Wikipedia

Asbestos

For other uses, see Asbestos (disambiguation).

Asbestos (/æsˈbɛstəs, æz-, -tɒs/ ass-BES-təs, az-, -⁠toss)[1] is a group of naturally occurring, toxic, carcinogenic and fibrous silicate minerals. There are six types, all of which are composed of long and thin fibrous crystals, each fibre (particulate with length substantially greater than width)[2] being composed of many microscopic "fibrils" that can be released into the atmosphere by abrasion and other processes. Inhalation of asbestos fibres can lead to various dangerous lung conditions, including mesothelioma, asbestosis, and lung cancer. As a result of these health effects, asbestos is considered a serious health and safety hazard.[3]

Asbestos
Fibrous tremolite asbestos on muscovite
General
CategorySilicate minerals
Strunz classification09.ED.15
Dana classification71.01.02d.03
Crystal systemOrthorhombic, monoclinic
Identification
Formula mass277.11 g
ColorGreen, red, yellow, white, gray, blue
Crystal habitAmorphous, granular, massive
CleavagePrismatic
FractureFibrous
Mohs scale hardness2.5.6.0
LusterSilky
StreakWhite
Specific gravity2.4–3.3
Optical propertiesBiaxial
Refractive index1.53–1.72
Birefringence0.008
2V angle20° to 60°
DispersionRelatively weak
ExtinctionParallel or oblique
Ultraviolet fluorescenceNon-fluorescent
Melting point400 to 1,040 °C (752 to 1,904 °F)

Archaeological studies have found evidence of asbestos being used as far back as the Stone Age to strengthen ceramic pots,[4] but large-scale mining began at the end of the 19th century when manufacturers and builders began using asbestos for its desirable physical properties. Asbestos is an excellent thermal and electrical insulator, and is highly fire resistant, so for much of the 20th century, it was very commonly used around the world as a building material (particularly for its fire-retardant properties), until its adverse effects on human health were more widely recognized and acknowledged in the 1970s.[5][6] Many buildings constructed before the 1980s contain asbestos.[7]

The use of asbestos for construction and fireproofing has been made illegal in many countries.[3] Despite this, around 255,000 people are thought to die each year from diseases related to asbestos exposure.[8] In part, this is because many older buildings still contain asbestos; in addition, the consequences of exposure can take decades to arise. The latency period (from exposure until the diagnosis of negative health effects) is typically 20 years.[7][9] The most common diseases associated with chronic asbestos exposure are asbestosis (scarring of the lungs due to asbestos inhalation) and mesothelioma (a type of cancer).[10]

Many developing countries still support the use of asbestos as a building material, and mining of asbestos is ongoing, with the top producer, Russia, having an estimated production of 790,000 tonnes in 2020.[11]

Etymology

edit

The word "asbestos", first used in the 1600s, ultimately derives from the Ancient Greek: ἄσβεστος, meaning "unquenchable" or "inextinguishable".[12][13][14][15] The name reflects use of the substance for wicks that would never burn up.[12]

It was adopted into English via the Old French abestos, which got the word from Greek via Latin, but in the original Greek, "asbestos" actually referred to quicklime. It is said by the Oxford English Dictionary that the word was wrongly used by Pliny for what we now call asbestos, and that he popularized the misnomer. Asbestos was originally referred to in Greek as amiantos, meaning "undefiled",[16] because when thrown into a fire it came out unmarked. "Amiantos" is the source for the word for asbestos in many languages, such as the Portuguese amianto and the French amiante. It had also been called "amiant" in English in the early 15th century, but this usage was superseded by "asbestos".[17] The word is pronounced /æsˈbɛstəs/ or /æsˈbɛstɒs/.[18]

History

edit

Asbestos has been used for thousands of years to create flexible objects that resist fire, including napkins, but, in the modern era, companies began producing consumer goods containing asbestos on an industrial scale.[19] Today, the risk of asbestos has been recognized; the use of asbestos is completely banned in 66 countries and strictly regulated in many others.[20][21]

Early references and uses

edit
For Chinese "fire-laundered cloth" in antiquity and medieval accounts, see huoshu.

Asbestos use dates back at least 4,500 years, when the inhabitants of the Lake Juojärvi region in East Finland strengthened earthenware pots and cooking utensils with the asbestos mineral anthophyllite; archaeologists call this style of pottery "asbestos-ceramic".[22] Some archaeologists believe that ancient peoples[clarification needed] made shrouds of asbestos, wherein they burned the bodies of their kings to preserve only their ashes and to prevent the ashes being mixed with those of wood or other combustible materials commonly used in funeral pyres.[23][24] Others assert that these peoples used asbestos to make perpetual wicks for sepulchral or other lamps.[25] A famous example is the golden lamp asbestos lychnis, which the sculptor Callimachus made for the Erechtheion.[26] In more recent centuries, asbestos was indeed used for this purpose.

A once-purported first description of asbestos occurs in Theophrastus, On Stones, from around 300 BC, but this identification has been refuted.[27][28] In both modern and ancient Greek, the usual name for the material known in English as "asbestos" is amiantos ("undefiled", "pure"), which was adapted into the French as amiante and into Spanish and Portuguese as amianto. In modern Greek, the word ἀσβεστος or ασβέστης stands consistently and solely for lime.

The term asbestos is traceable to Roman naturalist Pliny the Elder's first-century manuscript Natural History and his use of the term asbestinon, meaning "unquenchable"; he described the mineral as being more expensive than pearls.[29][12][13][22] While Pliny or his nephew Pliny the Younger is popularly credited with recognising the detrimental effects of asbestos on human beings,[30] examination of the primary sources reveals no support for either claim.[31]

In China, accounts of obtaining huo huan bu (火浣布) or "fire-laundered cloth" certainly dates to the Wei dynasty, and there are claims they were known as early as in the Zhou dynasty, though not substantiated except in writings thought to date much later [32][33] (see huoshu or "fire rat").

Athanasius of Alexandria, a Christian bishop living in 4th-century Egypt, references asbestos in one of his writings. Around the year 318, he wrote as follows:

The natural property of fire is to burn. Suppose, then, that there was a substance such as the Indian asbestos is said to be, which had no fear of being burnt, but rather displayed the impotence of the fire by proving itself unburnable. If anyone doubted the truth of this, all he need do would be to wrap himself up in the substance in question and then touch the fire."[34]

Wealthy Persians amazed guests by cleaning a cloth by exposing it to fire. For example, according to Tabari, one of the curious items belonging to Khosrow II Parviz, the great Sassanian king (r. 590–628), was a napkin (Persian: منديل) that he cleaned simply by throwing it into fire. Such cloth is believed to have been made of asbestos imported over the Hindu Kush.[35] According to Biruni in his book Gems, any cloths made of asbestos (Persian: آذرشست, āzarshost) were called shostakeh (Persian: شستكه).[36] Some Persians believed the fiber was the fur of an animal called the samandar (Persian: سمندر), which lived in fire and died when exposed to water;[25][37] this was where the former belief originated that the salamander could tolerate fire.[38] Charlemagne, the first Holy Roman Emperor (800–814), is also said to have possessed such a tablecloth.[39]

Marco Polo recounts having been shown, in a place he calls Ghinghin talas, "a good vein from which the cloth which we call of salamander, which cannot be burnt if it is thrown into the fire, is made ..."[40]

Industrial era

edit
 
Industrial scale asbestos mining began in 1878 in Thetford township, Quebec. By 1895, mining was increasingly mechanized.

The large-scale asbestos industry began in the mid-19th century. Early attempts at producing asbestos paper and cloth in Italy began in the 1850s but were unsuccessful in creating a market for such products. Canadian samples of asbestos were displayed in London in 1862, and the first companies were formed in England and Scotland to exploit this resource. Asbestos was first used in the manufacture of yarn, and German industrialist Louis Wertheim adopted this process in his factories in Germany. [41] In 1871, the Patent Asbestos Manufacturing Company was established in Glasgow, and during the following decades, the Clydebank area became a centre for the nascent industry.[42]

 
Canada's biggest power shovel loading an ore train with asbestos at the Jeffrey Mine, Johns-Manville Co., Asbestos, Quebec, June 1944

Industrial-scale mining began in the Thetford hills, Quebec, from the 1870s. Sir William Edmond Logan was the first to notice the large deposits of chrysotile in the hills in his capacity as head of Geological Survey of Canada. Samples of the minerals from there were displayed in London and elicited much interest.[41] With the opening of the Quebec Central Railway in 1876, mining entrepreneurs such as Andrew Stuart Johnson established the asbestos industry in the province.[43] The 50-ton output of the mines in 1878 rose to over 10,000 tonnes in the 1890s with the adoption of machine technologies and expanded production.[41][44] For a long time, the world's largest asbestos mine was the Jeffrey mine in the town of Asbestos, Quebec.[45]

 
The applications of asbestos multiplied at the end of the 19th century—this is an advertisement for an asbestos-lined clothes iron from 1906

Asbestos production began in the Urals of the Russian Empire in the 1880s, and the Alpine regions of Northern Italy with the formation in Turin of the Italo-English Pure Asbestos Company in 1876, although this was soon swamped by the greater production levels from the Canadian mines. Mining also took off in South Africa from 1893 under the aegis of the British businessman Francis Oates, the director of the De Beers company.[46] It was in South Africa that the production of amosite began in 1910. The U.S. asbestos industry had an early start in 1858 when fibrous anthophyllite was mined for use as asbestos insulation by the Johns Company, a predecessor to the current Johns Manville, at a quarry at Ward's Hill on Staten Island, New York.[47] US production began in earnest in 1899 with the discovery of large deposits in Belvidere Mountain in Vermont.

The use of asbestos became increasingly widespread toward the end of the 19th century when its diverse applications included fire-retardant coatings, concrete, bricks, pipes and fireplace cement, heat-, fire-, and acid-resistant gaskets, pipe insulation, ceiling insulation, fireproof drywall, flooring, roofing, lawn furniture, and drywall joint compound. In 2011, it was reported that over 50% of UK houses still contained asbestos, despite a ban on asbestos products some years earlier.[48]

In Japan, particularly after World War II, asbestos was used in the manufacture of ammonium sulfate for purposes of rice production, sprayed upon the ceilings, iron skeletons, and walls of railroad cars and buildings (during the 1960s), and used for energy efficiency reasons as well. Production of asbestos in Japan peaked in 1974 and went through ups and downs until about 1990 when production began to drop dramatically.[49]

Discovery of toxicity

edit
For additional chronological citations, see List of asbestos disease medical articles.

The 1898 Annual Report of the Chief Inspector of Factories and Workshops in the United Kingdom noted the negative health effects of asbestos,[50] the contribution having been made by Lucy Deane Streatfeild, one of the first women factory inspectors.

In 1899, H. Montague Murray noted the negative health effects of asbestos.[51] The first documented death related to asbestos was in 1906.[52]

In the early 1900s, researchers began to notice a large number of early deaths and lung problems in asbestos-mining towns. The first such study was conducted by Murray at the Charing Cross Hospital, London, in 1900, in which a postmortem investigation discovered asbestos traces in the lungs of a young man who had died from pulmonary fibrosis after having worked for 14 years in an asbestos textile factory. Adelaide Anderson, the Inspector of Factories in Britain, included asbestos in a list of harmful industrial substances in 1902. Similar investigations were conducted in France in 1906 and Italy in 1908.[53]

 
Asbestos fabric
 
Rockbestos, asbestos covered wire advertisement in Exhibitors Herald, 1926

The first diagnosis of asbestosis was made in the UK in 1924.[52][54][55] Nellie Kershaw was employed at Turner Brothers Asbestos in Rochdale, Greater Manchester, England, from 1917, spinning raw asbestos fibre into yarn.[55][56] Her death in 1924 led to a formal inquest. Pathologist William Edmund Cooke testified that his examination of the lungs indicated old scarring indicative of a previous, healed tuberculosis infection, and extensive fibrosis, in which were visible "particles of mineral matter ... of various shapes, but the large majority have sharp angles."[54] Having compared these particles with samples of asbestos dust provided by S. A. Henry, His Majesty's Medical Inspector of Factories, Cooke concluded that they "originated from asbestos and were, beyond a reasonable doubt, the primary cause of the fibrosis of the lungs and therefore of death."[55][57]

As a result of Cooke's paper, Parliament commissioned an inquiry into the effects of asbestos dust by E. R. A. Merewether, Medical Inspector of Factories, and C. W. Price, a factory inspector and pioneer of dust monitoring and control.[58] Their subsequent report, Occurrence of Pulmonary Fibrosis & Other Pulmonary Affections in Asbestos Workers, was presented to Parliament on 24 March 1930.[59] It concluded that the development of asbestosis was irrefutably linked to the prolonged inhalation of asbestos dust, and included the first health study of asbestos workers, which found that 66% of those employed for 20 years or more suffered from asbestosis.[58] The report led to the publication of the first asbestos industry regulations in 1931, which came into effect on 1 March 1932.[60] These rules regulated ventilation and made asbestosis an excusable work-related disease.[61] The term mesothelioma was first used in medical literature in 1931; its association with asbestos was first noted sometime in the 1940s. Similar legislation followed in the U.S. about ten years later.

Approximately 100,000 people in the United States have died, or are terminally ill, from asbestos exposure related to shipbuilding.[citation needed] In the Hampton Roads area, a shipbuilding center, mesothelioma occurrence is seven times the national rate.[62] Thousands of tons of asbestos were used in World War II ships to insulate piping, boilers, steam engines, and steam turbines. There were approximately 4.3 million shipyard workers in the United States during the war; for every 1,000 workers, about 14 died of mesothelioma and an unknown number died of asbestosis.[63]

The United States government and the asbestos industry have been criticized for not acting quickly enough to inform the public of dangers and to reduce public exposure. In the late 1970s, court documents proved that asbestos industry officials knew of asbestos dangers since the 1930s and had concealed them from the public.[63]

In Australia, asbestos was widely used in construction and other industries between 1946 and 1980. From the 1970s, there was increasing concern about the dangers of asbestos, and following community and union campaigning, its use was phased out, with mining having ceased in 1983.[64] The use of asbestos was phased out in 1989 and banned entirely in December 2003. The dangers of asbestos are now well known in Australia, and there is help and support for those suffering from asbestosis or mesothelioma.[65]

Use by industry and product type

edit

Serpentine group

edit
 
In Guy's Hospital, London, 1941, nurses arrange asbestos blankets over an electrically heated frame to create a hood over patients to help warm them quickly

Serpentine minerals have a sheet or layered structure. Chrysotile (commonly known as white asbestos) is the only asbestos mineral in the serpentine group. In the United States, chrysotile has been the most commonly used type of asbestos. According to the U.S. Environmental Protection Agency (EPA) Asbestos Building Inspectors Manual, chrysotile accounts for approximately 95% of asbestos found in buildings in the United States.[66] Chrysotile is often present in a wide variety of products and materials, including:

  • Chlor Alkali diaphragm membranes used to make chlorine (currently in the US)[67]
  • Drywall and joint compound (including texture coats)
  • Plaster
  • Gas mask filters throughout World War II until the 1960s for most countries; Germany and the USSR's Civilian issued filters up until 1988 tested positive for asbestos
  • Vinyl floor tiles, sheeting, adhesives
  • Roofing tars, felts, siding, and shingles[68]
  • "Transite" panels, siding, countertops, and pipes
  • Popcorn ceilings, also known as acoustic ceilings
  • Fireproofing
  • Caulk
  • Industrial and marine gaskets
  • Brake pads and shoes
  • Stage curtains
  • Fire blankets
  • Cement pipework
  • Interior fire doors
  • Fireproof clothing for firefighters
  • Thermal pipe insulation
  • Filters for removing fine particulates from chemicals, liquids, and wine
  • Dental cast linings
  • HVAC flexible duct connectors
  • Drilling fluid additives

In the European Union and Australia, it has been banned as a potential health hazard[69] and is no longer used at all.

  •  
    Example of asbestos cement siding and lining on a post-war temporary house in Yardley, Birmingham. Nearly 40,000 of these structures were built between 1946 and 1949 to house families
  •  
    An asbestos glove
  •  
    The M60 machine gun crew member responsible for a hot barrel change was issued protective asbestos gloves to prevent burns to the hands
  •  
    A household heat spreader for cooking on gas stoves, made of asbestos (probably 1950s; "amiante pur" is French for "pure asbestos")
  •  
    Gasket, containing nearly unbound asbestos
  •  
    Asbestos pipe for tobacco smoking from Belgium, with inscription "Real asbestos best quality".

Amphibole group

edit

Amphiboles including amosite (brown asbestos) and crocidolite (blue asbestos) were formerly used in many products until the early 1980s. [citation needed] Tremolite asbestos constituted a contaminant of many if not all naturally occurring chrysotile deposits. The use of all types of asbestos in the amphibole group was banned in much of the Western world by the mid-1980s, and in Japan by 1995.[70] Some products that included amphibole types of asbestos included the following:

  • Low-density insulating board (often referred to as AIB or asbestos insulating board) and ceiling tiles;
  • Asbestos cement sheets and pipes for construction, casing for water and electrical/telecommunication services;
  • Thermal and chemical insulation (e.g., fire-rated doors, limpet spray, lagging, and gaskets).
  • Electrical wiring, braided cables, cable wrap, wire insulation (usually crocidolite)

Cigarette manufacturer Lorillard (Kent's filtered cigarette) used crocidolite asbestos in its "Micronite" filter from 1952 to 1956.[71]

While mostly chrysotile asbestos fibers were once used in automobile brake pads, shoes, and clutch discs, contaminants of amphiboles were present. Since approximately the mid-1990s, brake pads, new or replacement, have been manufactured instead with linings made of ceramic, carbon, metallic, and aramid fiber (Twaron or Kevlar—the same material used in bulletproof vests).

Artificial Christmas snow, known as flocking, was previously made with asbestos.[72] It was used as an effect in films including The Wizard of Oz and department store window displays and it was marketed for use in private homes under brand names that included "Pure White", "Snow Drift" and "White Magic".[73]

Potential use in carbon sequestration

edit

The potential for use of asbestos to mitigate climate change has been raised. Although the adverse aspects of mining of minerals, including health effects, must be taken into account, exploration of the use of mineral wastes to sequester carbon is being studied. The use of mining waste materials from nickel, copper, diamond, and platinum mines have the potential as well, but asbestos may have the greatest potential and is the subject of research now in progress in an emerging field of scientific study to examine it. The most common type of asbestos, chrysotile, chemically reacts with CO2 to produce ecologically stable magnesium carbonate. Chrysotile, like all types of asbestos, has a large surface area that provides more places for chemical reactions to occur, compared to most other naturally occurring materials.[74]

Construction

edit

Developed countries

edit
 
Older decorative ceilings, similar to this one, may contain small amounts of white asbestos
 
1929 newspaper advertisement from Perth, Western Australia, for asbestos sheeting for residential building construction

The use of asbestos in new construction projects has been banned for health and safety reasons in many developed countries or regions, including the European Union, the United Kingdom, Australia, Hong Kong, Japan, and New Zealand. A notable exception is the United States, where asbestos continues to be used in construction such as cement asbestos pipes.[citation needed] The 5th Circuit Court prevented the EPA from banning asbestos in 1991 because EPA research showed the ban would cost between US$450 and 800 million while only saving around 200 lives in a 13-year timeframe, and that the EPA did not provide adequate evidence for the safety of alternative products.[75] Until the mid-1980s, small amounts of white asbestos were used in the manufacture of Artex, a decorative stipple finish,[76] however, some of the lesser-known suppliers of Artex-type materials were still adding white asbestos until 1999.[77]

Before the ban, asbestos was widely used in the construction industry in thousands of materials. Some are judged to be more dangerous than others due to the amount of asbestos and the material's friable nature. Sprayed coatings, pipe insulation, and Asbestos Insulating Board (AIB) are thought to be the most dangerous due to their high content of asbestos and friable nature. Many older buildings built before the late 1990s contain asbestos. In the United States, there is a minimum standard for asbestos surveys as described by ASTM standard E 2356–18. In the UK, the Health and Safety Executive have issued guidance called HSG264 describing how surveys should be completed although other methods can be used if they can demonstrate they have met the regulations by other means.[78] The EPA includes some, but not all, asbestos-contaminated facilities on the Superfund National Priorities List (NPL). Renovation and demolition of asbestos-contaminated buildings are subject to EPA NESHAP and OSHA Regulations. Asbestos is not a material covered under CERCLA's innocent purchaser defense. In the UK, the removal and disposal of asbestos and substances containing it are covered by the Control of Asbestos Regulations 2006.[79]

U.S. asbestos consumption hit a peak of 804,000 tons in 1973; world asbestos demand peaked around 1977, with 25 countries producing nearly 4.8 million metric tons annually.[80]

In older buildings (e.g. those built before 1999 in the UK, before white asbestos was banned), asbestos may still be present in some areas. Being aware of asbestos locations reduces the risk of disturbing asbestos.[81]

Removal of asbestos building components can also remove the fire protection they provide, therefore fire protection substitutes are required for proper fire protection that the asbestos originally provided.[81][82]

Outside Europe and North America

edit

Some countries, such as India, Indonesia, China and Russia, have continued widespread use of asbestos. The most common is corrugated asbestos-cement sheets or "A/C sheets" for roofing and sidewalls. Millions of homes, factories, schools or sheds, and shelters continue to use asbestos. Cutting these sheets to size and drilling holes to receive 'J' bolts to help secure the sheets to roof framing is done on-site. There has been no significant change in production and use of A/C sheets in developing countries following the widespread restrictions in developed nations.[83]

September 11 attacks

edit
See also: Health effects arising from the September 11 attacks

As New York City's World Trade Center collapsed following the September 11 attacks, Lower Manhattan was blanketed in a mixture of building debris and combustible materials. This complex mixture gave rise to the concern that thousands of residents and workers in the area would be exposed to known hazards in the air and dust, such as asbestos, lead, glass fibers, and pulverized concrete.[84] More than 1,000 tons of asbestos are thought to have been released into the air following the buildings' destruction.[85] Inhalation of a mixture of asbestos and other toxicants is thought to be linked to the unusually high death rate from cancer of emergency service workers since the disaster.[85] Thousands more are now thought to be at risk of developing cancer due to this exposure with those who have died so far being only the "tip of the iceberg".[85]

In May 2002, after numerous cleanup, dust collection, and air monitoring activities were conducted outdoors by EPA, other federal agencies, New York City, and the state of New York, New York City formally requested federal assistance to clean and test residences in the vicinity of the World Trade Center site for airborne asbestos.[84]

Asbestos contaminants in other products

edit

Vermiculite

edit

Vermiculite is a hydrated laminar magnesium-aluminum-iron silicate that resembles mica. It can be used for many industrial applications and has been used as insulation. Some deposits of vermiculite are contaminated with small amounts of asbestos.[86]

One vermiculite mine operated by W. R. Grace and Company in Libby, Montana exposed workers and community residents to danger by mining vermiculite contaminated with asbestos, typically richterite, winchite, actinolite or tremolite.[87] Vermiculite contaminated with asbestos from the Libby mine was used as insulation in residential and commercial buildings through Canada and the United States. W. R. Grace and Company's loose-fill vermiculite was marketed as Zonolite but was also used in sprayed-on products such as Monokote.

In 1999, the EPA began cleanup efforts in Libby and now the area is a Superfund cleanup area.[88] The EPA has determined that harmful asbestos is released from the mine as well as through other activities that disturb soil in the area.[89]

Talc

edit
 
A laboratory wire gauze made of asbestos, on a tripod over a Teclu burner

Talc can sometimes be contaminated with asbestos due to the proximity of asbestos ore (usually tremolite) in underground talc deposits.[90] By 1973, US federal law required all talc products to be asbestos-free.[91] Separating cosmetic-grade talc (e.g. talcum powder) from industrial-grade talc (often used in friction products) has largely eliminated this issue for consumers.[92] Cosmetics companies, including Johnson & Johnson, have known since the 1950s that talc products could be contaminated with asbestos.[93][94] In 2020, laboratory tests of 21 talc-based cosmetics products found that 15 percent were contaminated with asbestos.[93] In July 2024, the World Health Organization (WHO) heightened its health warning about talc exposure. In a study published in The Lancet, the WHO changed its classification of talc from "possibly carcinogenic" to "probably carcinogenic."[95]

In 2000, tests in a certified asbestos-testing laboratory found the tremolite form of amphibole asbestos used to be found in three out of eight popular brands of children's crayons that were made partly from talc: Crayola, Prang, and RoseArt.[96] In Crayola crayons, the tests found asbestos levels around 0.05% in Carnation Pink and 2.86% in Orchid; in Prang crayons, the range was from 0.3% in Periwinkle to 0.54% in Yellow; in Rose Art crayons, it was from 0.03% in Brown to 1.20% in Orange. Overall, 32 different types of crayons from these brands used to contain more than trace amounts of asbestos, and eight others contained trace amounts. The Art and Creative Materials Institute, a trade association which tested the safety of crayons on behalf of the makers, initially insisted the test results must have been incorrect, although they later said they do not test for asbestos.[96] In May 2000, Crayola said tests by Richard Lee, a materials analyst whose testimony on behalf of the asbestos industry has been accepted in lawsuits over 250 times, found its crayons tested negative for asbestos.[97] In spite of that, in June 2000 Binney & Smith, the maker of Crayola, and the other makers agreed to stop using talc in their products, and changed their product formulations in the United States.[97]

The mining company R T Vanderbilt Co of Gouverneur, New York, which supplied the talc to the crayon makers, states that "to the best of our knowledge and belief" there had never been any asbestos-related disease among the company's workers.[98] However media reports claim that the United States Mine Safety and Health Administration (MSHA) had found asbestos in four talc samples tested in 2000.[96] The Assistant Secretary for Mine Safety and Health subsequently wrote to the news reporter, stating that "In fact, the abbreviation ND (non-detect) in the laboratory report – indicates no asbestos fibers actually were found in the samples."[99] Multiple studies by mineral chemists, cell biologists, and toxicologists between 1970 and 2000 found neither samples of asbestos in talc products nor symptoms of asbestos exposure among workers dealing with talc,[100] but more recent work has rejected these conclusions in favor of "same as" asbestos risk.[101][102][clarification needed]

On 12 July 2018, a Missouri jury ordered Johnson & Johnson to pay a record $4.69 billion to 22 women who alleged the company's talc-based products, including its baby powder, contain asbestos and caused them to develop ovarian cancer.[103]

Types and associated fibers

edit

Six mineral types are defined by the EPA as "asbestos" including those belonging to the serpentine class and those belonging to the amphibole class. All six asbestos mineral types are known to be human carcinogens.[104][105] The visible fibers are themselves each composed of millions of microscopic "fibrils" that can be released by abrasion and other processes.[58]

  •  
    Chrysotile asbestos
  •  
    Asbestos fibers
  •  
    Asbestos
  •  
    Blue asbestos (crocidolite); the ruler is 1 cm
  •  
    Blue asbestos, teased to show the fibrous nature of the mineral

Serpentine

edit
 
Size of asbestos fibers compared to other particles (USEPA, March 1978)

Serpentine class fibers are curly. Chrysotile, CAS No. 12001-29-5 , is the only asbestos classed as a serpentine fiber. It is obtained from serpentinite rocks which are common throughout the world. Its idealized chemical formula is Mg3(Si2O5)(OH)4.[61] Chrysotile appears under the microscope as a white fiber.

Chrysotile has been used more than any other type and accounts for about 95% of the asbestos found in buildings in America.[106] Chrysotile is more flexible than amphibole types of asbestos and can be spun and woven into fabric. The most common use was corrugated asbestos cement roofing primarily for outbuildings, warehouses, and garages. It may also be found in sheets or panels used for ceilings and sometimes for walls and floors. Chrysotile has been a component in joint compound and some plasters. Numerous other items have been made containing chrysotile including brake linings, fire barriers in fuseboxes, pipe insulation, floor tiles, residential shingles, and gaskets for high-temperature equipment.[107]

Amphibole

edit

Amphibole class fibers are needle-like. Amosite, crocidolite, tremolite, anthophyllite and actinolite are members of the amphibole class.

Amosite

edit

Amosite, CAS No. 12172-73-5 , often referred to as brown asbestos, is a trade name for the amphiboles belonging to the cummingtonite-grunerite solid solution series, commonly from South Africa, named as a partial acronym for "Asbestos Mines of South Africa". One formula given for amosite is Fe7Si8O22(OH)2. Amosite is seen under a microscope as a grey-white vitreous fiber. It is found most frequently as a fire retardant in thermal insulation products, asbestos insulating board and ceiling tiles.[106]

Crocidolite

edit

Crocidolite, CAS No. 12001-28-4 , commonly known as blue asbestos, is the fibrous form of the amphibole riebeckite, found primarily in southern Africa, but also in Australia and Bolivia. One formula given for crocidolite is Na2FeII3FeIII2Si8O22(OH)2. Crocidolite is seen under a microscope as a blue fiber.

Crocidolite commonly occurs as soft friable fibers. Asbestiform amphibole may also occur as soft friable fibers but some varieties such as amosite are commonly straighter. All forms of asbestos are fibrillar in that they are composed of fibers with breadths less than 1 micrometer in bundles of very great widths. Asbestos with particularly fine fibers is also referred to as "amianthus".

Other materials

edit

Other regulated asbestos minerals, such as tremolite asbestos, CAS No. 77536-68-6 , Ca2Mg5Si8O22(OH)2; actinolite asbestos, CAS No. 77536-66-4, Ca2(Mg,FeII)5(Si8O22)(OH)2; and anthophyllite asbestos, CAS No. 77536-67-5 , (Mg,FeII)7Si8O22(OH)2; are less commonly used industrially but can still be found in a variety of construction materials and insulation materials and have been used in a few consumer products.

Other natural asbestiform minerals, such as richterite, Na(CaNa)(Mg,FeII)5(Si8O22)(OH)2, and winchite, (CaNa)Mg4(Al,FeIII)(Si8O22)(OH)2, though not regulated, are said by some to be no less harmful than tremolite, amosite, or crocidolite.[108] They are termed "asbestiform" rather than asbestos. Although the U.S. Occupational Safety and Health Administration (OSHA) has not included them in the asbestos standard, NIOSH and the American Thoracic Society have recommended them for inclusion as regulated materials because they may also be hazardous to health.[108]

"Mountain leather" is an old-fashioned term for flexible, sheet-like natural formations of asbestiform minerals which resemble leather. Asbestos-containing minerals known to form mountain leather include: actinolite, sepiolite, and tremolite.[109]

Production

edit
 
World production of asbestos (metric tons) from 1900 to 2017 with trend line

In 2017, 1.3 million tonnes of asbestos were mined worldwide. Russia was the largest producer with 53% of the world total, followed by Kazakhstan (16%), China (15%), and Brazil (11.5%).[110][111] Asia consumes some 70% of the asbestos produced in the world with China, India and Indonesia the largest consumers.[112]

In 2009, about 9% of the world's asbestos production was mined in Canada.[113] In late 2011, Canada's remaining two asbestos mines, both located in Quebec, halted operations.[114] In September 2012, the Quebec government halted asbestos mining.[115]

Health impact

edit
Main article: Health impact of asbestos
 
Left-sided mesothelioma (seen on the right of the image): chest CT

The most common diseases associated with chronic asbestos exposure are asbestosis (scarring of the lungs due to asbestos inhalation) and mesothelioma (cancer associated with asbestos).[10] Mesothelioma is an aggressive form of cancer and often leads to a life expectancy of less than 12 months after diagnosis.[116]

All types of asbestos fibers are known to represent serious health hazards in humans and animals.[117][118][119] Amosite and crocidolite are considered the most hazardous asbestos fiber types;[120][121] however, chrysotile asbestos has also produced tumors in animals and is a recognized cause of asbestosis and malignant mesothelioma in humans,[122] and mesothelioma has been observed in people who were occupationally exposed to chrysotile, family members of the occupationally exposed, and residents who lived close to asbestos factories and mines.[123]

During the 1980s and again in the 1990s, the asbestos industry suggested at times that the process of making asbestos cement could "neutralize" the asbestos, either via chemical processes or by causing the cement to attach to the fibers and changing their physical size; subsequent studies showed that this was untrue and that decades-old asbestos cement, when broken, releases asbestos fibers identical to those found in nature, with no detectable alteration.[124]

Exposure to asbestos in the form of fibers is always considered dangerous. Working with, or exposure to, material that is friable, or materials or works that could cause the release of loose asbestos fibers, is considered high risk. In general, people who become ill from inhaling asbestos have been regularly exposed in a job where they worked directly with the material.[125]

The US Occupational Safety and Health Administration (OSHA) has standards to protect workers from the hazards of exposure to asbestos in the workplace. The permissible exposure limit for asbestos is 0.1 fiber per cubic centimeter of air as an eight-hour time-weighted average, with an excursion limit of 1.0 asbestos fibers per cubic centimeter over a 30-minute period.[126]

Regulation

edit
Main article: Asbestos and the law

Complete bans on asbestos

edit
 
Asbestos warning label under EU directive of 1983

Worldwide, 66 countries and territories (including all those in the European Union) have banned the use of asbestos. Exemptions for minor uses are permitted in some countries listed; however, all countries listed must have banned the use of all types of asbestos.[127][128]

Country Ban Date
  Algeria
  Argentina
  Australia December 31, 2003
  Austria
  Bahrain
  Belgium
  Brazil
  Brunei
  Bulgaria
  Canada December 31, 2018
  Chile
  Colombia
  Croatia
  Cyprus
  Czech Republic
  Denmark
  Djibouti
  Egypt
  Estonia
  Finland
  France
  Gabon
  Germany
  Gibraltar
  Greece
  Honduras
  Hong Kong
  Hungary
  Iceland 1983
  Iraq
  Iran
  Ireland
  Israel
  Italy
  Japan March 2012
  Jordan
  South Korea January 2009
  Kuwait
  Latvia
  Liechtenstein
  Lithuania
  Luxembourg
  Malta
  Mauritius
  Monaco
  Mozambique
  Netherlands
  New Caledonia
  New Zealand 2015
  North Macedonia
  Norway
  Oman
  Poland
  Portugal
  Qatar
  Romania
  Saudi Arabia
  Serbia
  Seychelles
  Slovakia
  Slovenia
  South Africa
  Spain
  Sweden
   Switzerland
  Taiwan
  Turkey
  Ukraine September 6, 2022
  United Kingdom
  United States 2024[129]
  Uruguay

Australia

edit
 
Asbestos Products Ltd (Sydney) asbestos cement corrugated roofing for export
 
Asbestos-contaminated mulch in Sydney

The use of crocidolite (blue asbestos) was banned in 1967, while the use of amosite (brown asbestos) continued in the construction industry until the mid-1980s. It was finally banned from building products in 1989, though it remained in gaskets and brake linings until 31 December 2003, and cannot be imported, used, or recycled.[130][131]

Asbestos continues to be a problem in Australia. Two out of three homes in Australia built between World War II and the early 1980s still contain asbestos.[132]

The United Services Union, representing workers tasked with modifying electrical meter boxes at residences, stated that workers should refuse to do this work until the boxes have been inspected for asbestos,[133] and the head of the Australian Council of Trade Unions (ACTU) has called on the government to protect its citizens by ridding the country of asbestos by 2030.[134]

Handlers of asbestos materials must have a B-Class license for bonded asbestos and an A-Class license for friable asbestos.[citation needed]

The town of Wittenoom, in Western Australia, was built around a (blue) asbestos mine. The entire town continues to be contaminated and has been disincorporated, allowing local authorities to remove references to Wittenoom from maps and road signs.[citation needed]

In January 2024, asbestos was found in garden mulch supplied to dozens of sites including parks, playgrounds and schools across Sydney, triggering the Sydney asbestos mulch crisis.[135]

Canada

edit

As of December 31, 2018, it is illegal to import, manufacture, sell, trade, or use products made from asbestos. There are exemptions for its use in the chloralkali industry, the military, nuclear facilities, and for magnesium extraction from asbestos mining residues.[136]

Iran

edit

On 23 July 2000 Supreme Council of Environmental Protection of Iran banned any use of asbestos. On a note it states that after 44 years if there is no replacement technically, economically or financially the law is appealable and will be subject to review.[137][138][139]

On 22 November 2011 Iran's Environmental Protection Organization banned use of asbestos completely, it also banned all imports and exports of asbestos. On 9 October 2011 Supreme Council of Environmental Protection of Iran confirmed the new law and publicly announced it, updating and replacing the previous law.[137][138]

Japan

edit

Revelations that hundreds of workers had died in Japan over the previous few decades from diseases related to asbestos sparked a scandal in mid-2005.[140] Tokyo had, in 1971, ordered companies handling asbestos to install ventilators and check health regularly; however, the Japanese government did not ban crocidolite and amosite until 1995, and a near-complete ban with a few exceptions on asbestos was implemented in 2006, with the remaining exceptions being removed in March 2012 for a full-fledged ban.[141]

New Zealand

edit

In 1984, the import of raw amphibole (blue and brown) asbestos into New Zealand was banned. In 2002 the import of chrysotile (white) asbestos was also banned.[142] In 2015, the government announced that the importation of asbestos would be completely banned with very limited exceptions (expected to be applied to replacement parts for older machines) that would be reviewed on a case-by-case basis.[143]

North-west of Nelson, in the Upper Takaka Valley, is New Zealand's only commercially harvested asbestos mine. A low-grade Chrysotile was mined here from 1908 to 1917 but only 100 tons were washed and taken out by packhorse. A new power scheme enabled work to renew and between 1940 and 1949, 40 tons a month was mined by the Hume Company. This continued to 1964, when, due to the short length of its fibre, the limited commercial viability forced mining to cease.[144][145]

South Korea

edit

In May 1997, the manufacture and use of crocidolite and amosite, commonly known as blue and brown asbestos, were fully banned in South Korea.[146] In January 2009, a full-fledged ban on all types of asbestos occurred when the government banned the manufacture, import, sale, storage, transport or use of asbestos or any substance containing more than 0.1% of asbestos.[147] In 2011, South Korea became the world's sixth country to enact an asbestos harm aid act, which entitles any Korean citizen to free lifetime medical care as well as monthly income from the government if they are diagnosed with an asbestos-related disease.[148]

United Kingdom

edit

In the United Kingdom, blue and brown asbestos materials were banned outright in 1985 while the import, sale, and secondhand reuse of white asbestos was outlawed in 1999. The 2012 Control of Asbestos Regulations, updating and replacing the previous 2006 law, state that owners of non-domestic buildings (e.g., factories and offices) have a "duty to manage" asbestos on the premises by making themselves aware of its presence and ensuring the material does not deteriorate, removing it if necessary. Employers, e.g. construction companies, whose operatives may come into contact with asbestos must also provide annual asbestos training to their workers.[149]

United States

edit
See also: Asbestos and the law (United States)
 
Researcher using a fiber length classifier to produce length-selected fibers of asbestos for toxological studies

Prior to 2024, the United States remained one of the few developed countries to not completely ban asbestos.[150] Some American workers at chlorine plants frequently came in contact with the substance,[151] and OSHA exempted these plants from random inspections through the Voluntary Protection Program.[152]

In 1989, the United States Environmental Protection Agency (EPA) issued the Asbestos Ban and Phase-Out Rule, but in 1991, asbestos industry supporters challenged and overturned the ban in a landmark lawsuit: Corrosion Proof Fittings v. the Environmental Protection Agency.[153] Although the case resulted in several small victories for asbestos regulation, the EPA ultimately did not put an end to asbestos use. The ruling left many consumer products that can still legally contain trace amounts of asbestos. Six categories of asbestos-containing products are however banned: corrugated paper, rollboard, commercial paper, specialty paper, flooring felt and any new uses of asbestos. The Clean Air Act also bans asbestos pipe insulation and asbestos block insulation on components such as boilers and hot water tanks, and spray-applied surfacing asbestos-containing materials. The Consumer Product Safety Act bans asbestos in artificial fireplace embers and wall patching compounds. The Food and Drug Administration bans asbestos-containing filters in pharmaceutical manufacturing, processing, and packing.[154][155]

In 2014, the state of Washington banned asbestos in automotive brakes.[156]

In 2022, 224 metric tons of chrysotile asbestos were imported into the United States from Brazil and Russia, for use in diaphragms used to produce chlorine by the chloralkali process. As of 2020, imported goods containing asbestos included gaskets for some utility vehicles, rubber sheets used in gasket manufacturing, brake blocks for the oil industry, and vehicle friction materials such as aftermarket automotive brakes and linings.[157]

In 2024, the EPA announced a new rule to ban all ongoing uses of asbestos by 2037. The rule is the first to be implemented under 2016 amendments to the Toxic Substances Control Act.[158]

edit
Country
  Belarus
  Kazakhstan
  Russia
  India
  Pakistan
  China
  Cuba
  North Korea
  Mexico
  Vietnam

Mexico

edit

Since 1970, as a result of increased regulation of asbestos in Europe and in the United States, there was a massive transfer of asbestos-processing enterprises to Mexico. Asbestos is used in many products – roofing, boilers, pipes, brakes, and wires, produced by over 2,000 Mexican companies, many of them subsidiaries or subcontractors of US companies, and sold throughout the Americas. In 2000, 58% of Mexican asbestos-containing exports went to the United States, and 40% to Central American countries and Cuba.[159][160]

Vietnam

edit
 
Corrugated asbestos roof (with Fibre cement)

In Vietnam, chrysotile asbestos is not banned and is still widely used. Amphibole asbestos is banned from trade and use. Vietnam is one of the top 10 asbestos users in the world, with an annual import volume of about 65,000–70,000 tons of chrysotile.[161] About 90% of the imported asbestos is used to produce about 100 million m2 of cement roofing sheets (asbestos-cement). According to one study, among 300 families in Yen Bai, Thanh Hoa, 85% of households use asbestos roofing sheets, but only 5% know about the negative health effects.[162]

The master plan (for construction materials development to 2020 with orientation to 2030 submitted by the Ministry of Construction to the Government in January 2014) still suggests continued use of chrysotile for a long time.[162]

Substitutes for asbestos in construction

edit

Fiberglass insulation was invented in 1938 and is now the most commonly used type of insulation material. The safety of this material has also been called into question due to similarities in material structure.[163] However, the International Agency for Research on Cancer removed fiberglass from its list of possible human carcinogens in 2001.[164] A scientific review article from 2011 claimed epidemiology data was inconsistent and concluded that the IARC's decision to downgrade the carcinogenic potential of fiberglass was valid, although this study was funded by a sponsored research contract from the North American Insulation Manufacturer's Association.[165]

In 1978, a highly texturized fiberglass fabric was invented by Bal Dixit, called Zetex. This fabric is lighter than asbestos but offers the same bulk, thickness, hand, feel, and abrasion resistance as asbestos. The fiberglass was texturized to eliminate some of the problems that arise with fiberglass, such as poor abrasion resistance and poor seam strength.[166]

In Europe, mineral wool and glass wool are the main insulators in houses.

Many companies that produced asbestos-cement products that were reinforced with asbestos fibers have developed products incorporating organic fibers. One such product was known as "Eternit" and another "Everite" now use "Nutec" fibers which consist of organic fibers, portland cement and silica. Cement-bonded wood fiber is another substitute. Stone fibers are used in gaskets and friction materials.

Another potential fiber is polybenzimidazole or PBI fiber. Polybenzimidazole fiber is a synthetic fiber with a high melting point of 760 °C (1,400 °F) that also does not ignite. Because of its exceptional thermal and chemical stability, it is often used by fire departments and space agencies.

Recycling and disposal

edit
 
Wailuku, Hawaii post office sealed off for asbestos removal

In most developed countries, asbestos is typically disposed of as hazardous waste in designated landfill sites.

The demolition of buildings containing large amounts of asbestos-based materials pose particular problems for builders and property developers – such buildings often have to be deconstructed piece by piece, or the asbestos has to be painstakingly removed before the structure can be razed by mechanical or explosive means. One such example is the Red Road Flats in Glasgow, Scotland which used huge amounts of asbestos cement board for wall panelling – British health and safety regulations stipulate that asbestos material has to be removed in specially adapted vehicles and taken to a landfill site with an appropriate permit to accept asbestos, via an approved route, at certain times of the day.[citation needed]

In the United States, the EPA governs the removal and disposal of asbestos strictly. Companies that remove asbestos must comply with EPA licensing. These companies are called EPA licensed asbestos contractors. Anytime one of these asbestos contractors performs work a test consultant has to conduct strict testing to ensure the asbestos is completely removed.[citation needed]

Asbestos can be destroyed by ultra-high-temperature incineration and plasma melting process. A process of thermal decomposition at 1,000–1,250 °C (1,800–2,300 °F) produces a mixture of non-hazardous silicon-based wastes, and at temperatures above 1,250 °C (2,300 °F) it produces silicate glass.[167] Microwave thermal treatment can be used in an industrial manufacturing process to transform asbestos and asbestos-containing waste into porcelain stoneware tiles, porous single-fired wall tiles, and ceramic bricks.[168]

The combination of oxalic acid with ultrasound fully degrades chrysotile asbestos fibers.[169]

Abbreviations associated with asbestos

edit

See also

edit

References

edit
  1. ^ "asbestos". Dictionary.com Unabridged (Online). n.d.
  2. ^ "Exposure and Disposition". Exposure and Disposition – Asbestos – NCBI Bookshelf. National Academies Press (US). 2006.
  3. ^ a b "What is asbestos?". British Lung Foundation. 28 September 2015. Archived from the original on 16 April 2020. Retrieved 26 May 2019.
  4. ^ Yildirim Dilek; Sally Newcomb (2003). Ophiolite Concept and the Evolution of Geological Thought. Geological Society of America. p. 449. ISBN 978-0-8137-2373-0.
  5. ^ Bureau of Naval Personnel, Basic Electricity. 1969: US Navy.
  6. ^ Kazan-Allen, Laurie (15 July 2019). "Chronology of Asbestos Bans and Restrictions". International Ban Asbestos Secretariat.
  7. ^ a b Kazan-Allen, Laurie (2 May 2002). "Asbestos: Properties, Uses and Problems". International Ban Asbestos Secretariat.
  8. ^ Furuya, Sugio; Chimed-Ochir, Odgerel; Takahashi, Ken; David, Annette; Takala, Jukka (May 2018). "Global Asbestos Disaster". International Journal of Environmental Research and Public Health. 15 (5): 1000. doi:10.3390/ijerph15051000. ISSN 1661-7827. PMC 5982039. PMID 29772681.
  9. ^ King, Anthony (25 June 2017). "Asbestos, explained". Royal Society of Chemistry.
  10. ^ a b ATSDR – Asbestos – Health Effects. (1 April 2008). ATSDR Home. Retrieved 24 January 2011
  11. ^ Flanagan, Daniel M. (29 January 2021). "Mineral Commodity Summaries 2021". Mineral Commodity Summaries. U.S. Geological Survey. pp. 26–27. doi:10.3133/mcs2021. S2CID 242973747.
  12. ^ a b c Alleman, James E.; Mossman, Brooke T (July 1997). "Asbestos Revisited" (PDF). Scientific American. 277 (1): 54–57. Bibcode:1997SciAm.277a..70A. doi:10.1038/scientificamerican0797-70. Archived from the original (PDF) on 3 June 2010. Retrieved 26 November 2010.
  13. ^ a b Bostock, John (1856). "Asbestinon". The Natural History of Pliny. Vol. IV. Translated by Riley, H. T. London: Henry G. Bohn. p. 137. Retrieved 26 November 2010.
  14. ^ Shorter Oxford English Dictionary (5th ed.). Oxford University Press. 2002. ISBN 978-0-19-860457-0.
  15. ^ ἄσβεστος. Liddell, Henry George; Scott, Robert; A Greek–English Lexicon at the Perseus Project.
  16. ^ ἀμίαντος in Liddell and Scott.
  17. ^ "asbestos | Origin and meaning of asbestos by Online Etymology Dictionary". www.etymonline.com. Retrieved 14 December 2018.
  18. ^ "asbestos". Oxford Living Dictionaries. Oxford University Press. Archived from the original on 21 March 2019. Retrieved 21 March 2019.
  19. ^ Oversight Hearings on Asbestos Health Hazards to Schoolchildren: Hearings Before the Subcommittee on Elementary, Secondary, and Vocational Education of the Committee on Education and Labor, House of Representatives, Ninety-sixth Congress, First Session, on H.R. 1435 and H.R. 1524. U.S. Government Printing Office. 1979. p. 485. OCLC 1060686493.
  20. ^ Kazan-Allen, Laurie. "Current Asbestos Bans". International Ban Asbestos Secretariat. Retrieved 10 August 2022.
  21. ^ Anthony Newman Taylor; Paul Cullinan; Paul Blanc; Anthony Pickering (25 November 2016). Parkes' Occupational Lung Disorders. CRC Press. p. 157. ISBN 978-1-4822-4142-6. Retrieved 10 August 2022.
  22. ^ a b Ross, Malcolm & Nolan, Robert P (2003). "History of asbestos discovery and use and asbestos-related disease in context with the occurrence of asbestos within the ophiolite complexes". In Dilek, Yildirim & Newcomb, Sally (eds.). Ophiolite Concept and the Evolution of Geological Thought. Special Paper 373. Boulder, Colorado: Geological Society of America. ISBN 978-0-8137-2373-0.
  23. ^ Chambers, Ephraim (1728). Cyclopædia. p. 147. Retrieved 3 March 2024.
  24. ^ Pliny the Elder. Ch. 4.—LINEN MADE OF ASBESTOS. In The Natural History
  25. ^ a b "University of Calgary". Iras.ucalgary.ca. 30 September 2001. Archived from the original on 5 November 2009. Retrieved 12 January 2010.
  26. ^ Eleftheratou, S. (2016). Acropolis museum guide. Acropolis Museum Editions. p. 258.
  27. ^ Needham, Joseph (1959). "Asbestos". Science and Civilisation in China: Volume 3, Mathematics and the Sciences of the Heavens and the Earth. Cambridge University Press. p. 656. ISBN 9780521058018.
  28. ^ Caley, Earl R.; Richards, John F. C. (1956). "Commentary". Theophrastus on Stones: Introduction, Greek Text, English Translation, and Commentary. Graduate School Monographs: Contributions in Physical Science, No. 1. Columbus, OH: The Ohio State University. pp. 87–88. Archived from the original on 24 December 2013. Retrieved 31 January 2013. Moore thought that Theophrastus was really referring to asbestos. The colour of the stone makes this unlikely, though its structure makes it less improbable since some forms of decayed wood do have a fibrous structure like asbestos ... It is, however, unlikely that Theophrastus is alluding to asbestos since the mineral does not occur in the locality mentioned ... It is much more probable that Theophrastus is referring to the well-known brown fibrous lignite.
  29. ^ "Asbestos: The strange past of the 'magic mineral'". BBC. 7 February 2024.
  30. ^ Barbalace, Roberta C. (22 October 1995). "History of Asbestos". Environmentalchemistry.com. Retrieved 12 January 2010.
  31. ^ Maines, Rachel (2005). Asbestos and Fire: Technological Trade-offs and the Body at Risk. Rutgers University Press. p. 7. ISBN 978-0-8135-3575-3.
  32. ^ Cheng, Weiji (1992). History of Textile Technology of Ancient China. Science Press New York. p. 451. ISBN 9787030005489.
  33. ^ Needham (1959), pp. 656–657.
  34. ^ Athanasius (2018). On the Incarnation. GLH Publishing. p. 49. ISBN 978-1-948648-24-0.
  35. ^ New Encyclopædia Britannica (2003), vol. 6, p. 843
  36. ^ Dehkhoda Persian Dictionary
  37. ^ A Brief History of Asbestos Use and Associated Health Risks EnvironmentalChemistry.com website
  38. ^ "Fantastically Wrong: The Legend of the Homicidal Fire-Proof Salamander". WIRED. Retrieved 3 May 2016.
  39. ^ "Science: Asbestos". Time. 29 November 1926. Archived from the original on 31 January 2011. Retrieved 11 January 2011.
  40. ^ Polo, Marco; A C. Moule; Paul Pelliot (1938). Marco Polo: the Description of the World: A.C. Moule & Paul Pelliot. G. Routledge & Sons. pp. 156–57. Retrieved 31 January 2013.
  41. ^ a b c Selikoff, Irving J. (1978). Asbestos and Disease. Elsevier. pp. 8–20. ISBN 978-0-323-14007-2.
  42. ^ "Asbestos & Clydebank". Clydebank Asbestos Group. Archived from the original on 6 June 2014.
  43. ^ The storied province of Quebec : past and present. Volume V (1931) Archived 3 March 2016 at the Wayback Machine Wood, WCH; Atherton, WH; Conklin, EP pp. 814–5
  44. ^ Udd, John (1998) "A Chronology of Minerals Development in Canada" Archived 9 May 2013 at the Wayback Machine National Resources Canada
  45. ^ Jessica Elzea Kogel; et al., eds. (2006). Industrial minerals & rocks: commodities, markets, and uses. Society for Mining, Metallurgy, and Exploration. p. 195. ISBN 978-0-87335-233-8.
  46. ^ "Oats, Francis of Golant". South African Who's Who 1916. November 2006. Archived from the original on 1 June 2016. Retrieved 6 June 2014.
  47. ^ Betts, John (May–June 2009). "The Minerals of New York City". Rocks & Mineral Magazine. 84 (3): 204–252. doi:10.3200/RMIN.84.3.204-223. S2CID 128683529. Retrieved 21 April 2011.
  48. ^ Don, Andrew (1 May 2011) Asbestos: the hidden health hazard in millions of homes. The Guardian.
  49. ^ Morinaga, Kenji. "Asbestos in Japan" (PDF). European Conference 2003. Archived from the original (PDF) on 19 July 2011. Retrieved 12 January 2010.
  50. ^ "PDF link to relevant page of report" (PDF).
  51. ^ Luus, K (2007). "Asbestos: Mining exposure, health effects and policy implications". McGill Journal of Medicine. 10 (2): 121–6. PMC 2323486. PMID 18523609.
  52. ^ a b "The History of Asbestos in the UK – The story so far ... Asbestos uses and regulations timeline" (PDF). silverdell.plc.uk. 30 April 2012. Archived from the original (PDF) on 21 October 2013.
  53. ^ Selikoff, Irving J. (1978). Asbestos and Disease. Elsevier. pp. 20–32. ISBN 978-0-323-14007-2.
  54. ^ a b Cooke, W.E. (26 July 1924). "Fibrosis of the Lungs Due to the Inhalation of Asbestos Dust". Br Med J. 2 (3317). London: BMA: 140–2, 147. doi:10.1136/bmj.2.3317.147. ISSN 0959-8138. PMC 2304688. PMID 20771679.
  55. ^ a b c Selikoff, Irving J.; Greenberg, Morris (20 February 1991). "A Landmark Case in Asbestosis" (PDF). JAMA. 265 (7). Chicago, Illinois: AMA: 898–901. doi:10.1001/jama.265.7.898. ISSN 0098-7484. PMID 1825122. Retrieved 20 April 2010.
  56. ^ Bartrip, P.W.J. (2001). The Way from Dusty Death: Turner and Newall and the Regulation of the British Asbestos Industry 1890s–1970. London: The Athlone Press. p. 12. ISBN 978-0-485-11573-4.
  57. ^ Bartrip, Peter (1998). "Too little, too late? The home office and the asbestos industry regulations, 1931". Med. Hist. 42 (4). London: The Wellcome Trust Centre for the History of Medicine at UCL: 421–438. doi:10.1017/s0025727300064334. ISSN 0025-7273. PMC 1044071. PMID 10505397.
  58. ^ a b c Gee, David; Greenberg, Morris (9 January 2002). "Asbestos: from 'magic' to malevolent mineral" (PDF). Late Lessons from Early Warnings: The Precautionary Principle 1896–2000 (22). Copenhagen: EEA: 52–63. ISBN 978-92-9167-323-0. Retrieved 20 April 2010.
  59. ^ Published as Report on the effects of asbestos dust on the lungs and dust suppression in the asbestos industry. Part I. Occurrence of pulmonary fibrosis and other pulmonary affections in asbestos workers. Part II. Processes giving rise to dust and methods for its suppression. London: HMSO, 1930.
  60. ^ "Classic papers in Public Health: Annual Report of the Chief Inspector of Factories for the Year 1947 by E.R.A. Merewether – The Pump Handle". scienceblogs.com. 21 October 2013. Retrieved 21 October 2013.
  61. ^ a b "What is asbestos?". American Cancer Society. Archived from the original on 16 February 2015. Retrieved 12 January 2010.
  62. ^ Burke, Bill (6 May 2001) "Shipbuilding's Deadly Legacy: Introduction: Horrible Toll Could Have Been Avoided" Virginian-Pilot Norfolk, Virginia (newspaper); from Internet Archive
  63. ^ a b Burke, Bill (6 May 2001) "Shipyards, a Crucible for Tragedy: Part 1: How the war created a monster" Virginian-Pilot Norfolk, Virginia (newspaper)
  64. ^ Commons Librarian (22 December 2023). "Campaigns that Changed Western Australia". The Commons Social Change Library. Retrieved 19 April 2024.
  65. ^ Lavelle, Peter (29 April 2004) Australian Broadcasting Corporation Fact File: Asbestos. Australian Broadcasting Corporation
  66. ^ Franck, Harold; Franck, Darren (2016). Forensic Engineering Fundamentals. Boca Raton FL: CRC Press. p. 103. ISBN 978-1-4398-7840-8.
  67. ^ Caustic Soda Production. Olin Corporation
  68. ^ Hearst Magazines (July 1935). "Popular Mechanics". Popular Mechanics. Hearst Magazines: 62. ISSN 0032-4558. Retrieved 10 January 2012.
  69. ^ "NOHSC declares prohibition on use of chrysotile asbestos". Ascc.gov.au. 17 October 2001. Archived from the original on 7 June 2008.
  70. ^ "International Bans on Asbestos Use – Asbestos and Libby Health – the University of Montana".
  71. ^ Cigarette Filter Danger. Snopes.com. Retrieved 10 January 2012.
  72. ^ Otway, Helen (2005). "Unbelievable Random Facts". 1001 unbelievable Facts. Capella. p. 191. ISBN 978-1-84193-783-0.
  73. ^ Asbestos in Fake Snow Wizard of Oz. Retrieved 19 December 2014
  74. ^ Temple, James, Asbestos could be a powerful weapon against climate change (you read that right), MIT Technology Review, October 6, 2020
  75. ^ 947 F. 2d 1201 – Corrosion Proof Fittings v. Environmental Protection Agency. Openjurist.org. Retrieved 10 January 2012.
  76. ^ Where can asbestos be found, Asbestos Surveying Ltd, Birmingham, UK, 2 08 2008 Archived 11 June 2017 at the Wayback Machine. Retrieved 29 December 2008.
  77. ^ Artex website, Click the "Asbestos in Artex" button.
  78. ^ Asbestos: The survey guide (Second ed.). House and Safety Executive. 2012. ISBN 978-0-7176-6502-0. Retrieved 12 September 2022.
  79. ^ "Control of Asbestos Regulations 2006, Health and Safety Executive, London, UK, Undated. Retrieved 29 December 2008". Archived from the original on 19 May 2009. Retrieved 29 December 2008.
  80. ^ History of Asbestos, Asbestos.com, retrieved 7 April 2016
  81. ^ a b "Asbestos in the home booklet. Wrekin housing trust" (PDF). Retrieved 26 October 2010.
  82. ^ Asbestos Removal Archived 29 August 2012 at the Wayback Machine. Laws.sandwell.gov.uk (1 April 2005). Retrieved 10 January 2012.
  83. ^ "Globalization: Threat or Opportunity? An IMF Issues Brief". www.imf.org. Retrieved 21 October 2023.
  84. ^ a b Stephenson, John B. (20 June 2007). World Trade Center: preliminary observations on EPA's second program to address indoor contamination (GAO-07-806T): testimony before the Subcommittee on Superfund and Environmental Health, U.S. Senate Committee on Environment and Public Works. Washington, D.C.: U.S. Government Accountability Office.
  85. ^ a b c Pilkington, Ed (11 November 2009). "9/11's delayed legacy: cancer for many of the rescue workers". The Guardian. London. Archived from the original on 12 May 2017.
  86. ^ "EPA Asbestos Contamination in Vermiculite". Epa.gov. 28 June 2006. Archived from the original on 11 January 2010.
  87. ^ Meeker, G.P (2003). "The Composition and Morphology of Amphiboles from the Rainy Creek Complex, Near Libby, Montana". American Mineralogist. 88 (11–12): 1955–1969. Bibcode:2003AmMin..88.1955M. doi:10.2138/am-2003-11-1239. S2CID 12134481.
  88. ^ "Libby Asbestos – US EPA Region 8". Epa.gov. Archived from the original on 5 February 2010. Retrieved 12 January 2010.
  89. ^ "Risk Assessment – US EPA". Epa.gov. 22 December 2008.
  90. ^ Van Gosen, Bradley S.; Lowers, Heather A.; Sutley, Stephen J. (2004). "A USGS Study of Talc Deposits and Associated Amphibole Asbestos Within Mined Deposits of the Southern Death Valley Region, California". Pubs.usgs.gov.
  91. ^ Dillner, Luisa (29 February 2016). "Is it safe to use talcum powder?". The Guardian. ISSN 0261-3077. Retrieved 3 April 2017.
  92. ^ "The Straight Dope: Is talcum powder asbestos?". www.straightdope.com. 16 February 1990. Retrieved 3 April 2017.
  93. ^ a b "Cosmetics companies face major concern over asbestos contamination of talc | Environmental Working Group". www.ewg.org. 5 May 2023. Retrieved 6 September 2024.
  94. ^ Girion, Lisa (14 December 2018). "J&J knew for decades that asbestos lurked in its baby powder".
  95. ^ "WHO: Talc 'Probably Carcinogenic' to Humans". Drugwatch.com. Retrieved 6 September 2024.
  96. ^ a b c "Major brands of kids' crayons contain asbestos, tests show". Seattle Post-Intelligencer. 23 May 2000. Archived from the original on 4 March 2012.
  97. ^ a b Schneider, Andrew; Smith, Carol (13 June 2000). "Crayon firms agree to stop using talc" (PDF). Seattle Post-Intelligencer. Archived from the original (PDF) on 13 July 2012.
  98. ^ Schneider, Andrew; Smith, Carol (30 May 2000). "Old dispute rekindled over content of mine's talc" (PDF). Seattle Post-Intelligencer. Retrieved 7 March 2021.
  99. ^ McAteer, J. Davitt Assist. Secretary for Mine Safety and Health correspondence to Andrew Schneider of the Seattle Post-Intelligencer dated 14 June 2000 – copy obtainable through records archives MSHA.
  100. ^ For studies finding no asbestos in talcum powder samples, see:
    • Van Orden, D., R. J. Lee: Weight Percent Compositional Analysis of Seven RTV Talc Samples. Analytical Report to R. T. Vanderbilt Company, Inc. 22 November 2000. Submitted to Public Comments Record – C. W. Jameson, National Toxicology Program, 10th ROC Nominations "Talc (containing asbestiform fibers)". 4 December 2000.
    • Nord, G. L, S. W. Axen, R. P. Nolan: Mineralogy and Experimental Animal Studies of Tremolitic Talc. Environmental Sciences Laboratory, Brooklyn College, The City University of New York. Submitted to Public Comments Record – C. W. Jameson, National Toxicology Program, 10th ROC Nominations "Talc (containing asbestiform fibers)". 1 December 2000.
    • Kelse, J. W.; Thompson, C. Sheldon (1989). "The Regulatory and Mineralogical Definitions of Asbestos and Their Impact on Amphibole Dust Analysis". AIHA Journal. 50 (11): 613–622. doi:10.1080/15298668991375245.
    • Wylie, A.G. (2 June 2000) Report of Investigation. Analytical Report on RTV talc submitted to R. T. Vanderbilt Company, Inc. 13 February 1987 (Submitted to Public Comments Record – C. W. Jameson, National Toxicology Program, 10th ROC Nominations "Talc (containing asbestiform fibers)".
    • Crane, D. (26 November 1986) Letter to Greg Piacitelli (NIOSH) describing the analytical findings of the Occupational Safety and Health Administration regarding R. T. Vanderbilt Talc (In OSHA Docket H-33-d and in Public Comments Record – C. W. Jameson, National Toxicology Program, 10th ROC Nominations – 2 June 2000).
    • Crane, D. (12 June 2000) Background Information Regarding the Analysis of Industrial Talcs. Letter to the Consumer Product Safety Commission from the Occupational Safety and Health Administration. (Appended to CPSC Staff Report on "Asbestos in Children's Crayons" Aug. 2000).
    • McCrone Associates – Atlanta Lab.: Report on the Analysis of Paint CLS-5067-1 and Mineral Filler CLS-N-439-1. To Unspecified Paint Company 23 September 1992. (Submitted to Public Comments Record – C. W. Jameson, National Toxicology Program, 10th ROC Nominations "Talc (containing asbestiform fibers)". 2 June 2000.
    • Langer, A. M., Nolan, R. P. (November 2000) "Mineralogical Characterization of Vanderbilt Talc Specimens & Comparison of the 1976 Rohl Talc Report to NIOSH and Analysis Performed in 1988". In Public Comments – Nat'l Toxicology Program 10th ROC review. W. Jameson NIEHS MED EC-14, 79 Alexander Drive Research Triangle Park, NC "Talc (containing asbestiform fibers)".
    • United States Department of the Interior: Selected Silicate Minerals and Their Asbestiform Varieties by W. J. Campbell, et al. (Bureau of Mines Information Circular, I. C. 8751). Washington, D.C.: Dept. of the Interior, Bureau of Mines. (1977).
    For studies finding no biological effects associated with talcum powder, see:
  101. ^ Dement, JM; Brown, DP (1982). "Occupational exposure to talc containing asbestos". American Industrial Hygiene Association Journal. 43 (6): A24–5. PMID 7113917.
  102. ^ Hull, M. J.; Abraham, J. L.; Case, B. W. (2002). "Mesothelioma among Workers in Asbestiform Fiber-Bearing Talc Mines in New York State". Annals of Occupational Hygiene. 46: 132–135. doi:10.1093/annhyg/46.suppl_1.132.
  103. ^ Bellon, Tina. "Jury orders J&J to pay $4.7 billion in Missouri asbestos cancer case". U.S. Retrieved 13 July 2018.
  104. ^ "Asbestos, CAS No. 1332-21-4" (PDF). Archived (PDF) from the original on 29 April 2011.
  105. ^ Berman, D Wayne; Crump, Kenny S (2003). Final draft:technical support document for a protocol to assess asbestos-related risk. Washington DC: U.S. Environmental Protection Agency. p. 474.
  106. ^ a b "Asbestos – History and Uses". Wisconsin Department of Natural Resources. 31 August 2007. Archived from the original on 28 December 2007.
  107. ^ Loreto, Olga (18 September 2018). "What is Asbestos? Asbestos is a set of six naturally occurring..." EE&G. Retrieved 21 October 2023.
  108. ^ a b Occupational Exposure to Asbestos, Tremolite, Anthophyllite and Actinolite Archived 3 May 2017 at the Wayback Machine. U.S. Department of Labor. 1992
  109. ^ "Mountain Leather". www.mindat.org. Retrieved 20 September 2021.
  110. ^ Flanagan, Daniel M. (31 January 2018). "Mineral Commodity Summaries 2018" (PDF). Reston, Virginia: U.S. Geological Survey. p. 27.
  111. ^ "Asbestos" (PDF). U.S. Geological Survey Mineral Resources Program. January 2016.
  112. ^ Tsujimura, Tatsuya (18 November 2014). "Japanese docs trying to stop all asbestos use in Asia". The Japan Times. Tokyo.
  113. ^ "Asbestos" (PDF). U.S. Geological Survey Mineral Resources Program. January 2010.
  114. ^ Asbestos mining stops for the first time in 130 years. Canadian Broadcasting Corporation. 24 November 2011
  115. ^ Dougherty, Kevin (20 November 2012) Quebec Budget: Finance Minister Nicolas Marceau tightens spending, levies new taxes. Ottawa Citizen
  116. ^ "Asbestos Related Diseases". Asbestos Awareness. 27 April 2021. Retrieved 23 February 2022.
  117. ^ Asbestos: elimination of asbestos-related diseases. World Health Organization. July 2014
  118. ^ Straif, K; Benbrahim-Tallaa, L; Baan, R; Grosse, Y; Secretan, B; El Ghissassi, F; Bouvard, V; Guha, N; Freeman, C; Galichet, L; Cogliano, V; WHO International Agency for Research on Cancer Monograph Working Group (2009). "A review of human carcinogens—Part C: Metals, arsenic, dusts, and fibres" (PDF). The Lancet. Oncology. 10 (5): 453–4. doi:10.1016/S1470-2045(09)70134-2. PMID 19418618.
  119. ^ Collegium Razmzzini 2010 Statement on Asbestos. collegiumramazzini.org
  120. ^ "Types of Asbestos – Chyrsotile, Actinolite, Tremolite & More". Mesothelioma Center – Vital Services for Cancer Patients & Families. Retrieved 25 June 2020.
  121. ^ Hodgson, J; Darnton, A (2000). "The quantitative risks of mesothelioma and lung cancer in relation to asbestos exposure". The Annals of Occupational Hygiene. 44 (8): 565–601. doi:10.1016/s0003-4878(00)00045-4. ISSN 0003-4878. PMID 11108782.
  122. ^ Kanarek, M. S. (2011). "Mesothelioma from Chrysotile Asbestos: Update". Annals of Epidemiology. 21 (9): 688–97. doi:10.1016/j.annepidem.2011.05.010. PMID 21820631.
  123. ^ Marbbn, C.A. (2009). "Asbestos Risk Assessment". The Journal of Undergraduate Biological Studies: 12–24.
  124. ^ "Investigation of the chrysotile fibres in an asbestos cement sample (2006) – HSL/2007/11, p.26 onward" (PDF). www.hse.gov.uk]. Archived from the original (PDF) on 14 February 2019. Retrieved 5 April 2015.
  125. ^ "What does asbestos do to you? | Affects of exposure and who is at risk". CPD Online College. 17 July 2019. Retrieved 13 August 2019.
  126. ^ "OSHA Fact Sheet" (PDF). US Department of Labor, Occupational Safety and Health Administration. Retrieved 28 April 2020.
  127. ^ "National Asbestos Bans". ibasecretariat.org. Retrieved 22 June 2020.
  128. ^ "Chronology of Asbestos Bans and Restrictions". ibasecretariat.org. Retrieved 22 June 2020.
  129. ^ "Asbestos Part 1; Chrysotile Asbestos; Regulation of Certain Conditions of Use Under the Toxic Substances Control Act (TSCA)" (PDF). Environmental Protection Agency. 14 March 2024. Retrieved 16 August 2024.
  130. ^ "Mesothelioma in Australia". Asbestos.com. Retrieved 13 December 2012.
  131. ^ "National Health and Medical Research Council". Retrieved 13 December 2012.
  132. ^ "Building unions seek laws to clear asbestos". The Sydney Morning Herald. Retrieved 2 February 2013.
  133. ^ "Unions warn on meter board asbestos". Australian Associated Press. Retrieved 10 August 2013.
  134. ^ "All buildings should be cleared of asbestos by 2030 to save future generations". ACTU. 16 September 2011. Archived from the original on 13 April 2014.
  135. ^ Turnbull, Tiffanie (19 February 2024). "Sydney asbestos scare: How a mulch discovery has sent a city scrambling". BBC News. Archived from the original on 25 February 2024.
  136. ^ Povtak, Tim (22 October 2018). "/ News / Asbestos Exposure & Bans Canada Announces Asbestos Ban with Exemptions". Asbestos.com. Orlando, FL: The Mesothelioma Center.
  137. ^ a b ایران, عصر. "استفاده از هر گونه آزبست برای همیشه ممنوع شد". fa (in Persian). Retrieved 22 August 2023.
  138. ^ a b "محصولاتی که بوی سرطان می دهد!/ ممنوعیت کامل آزبست تا شهریور 91". خبرگزاری مهر | اخبار ایران و جهان | Mehr News Agency (in Persian). 16 December 2011. Retrieved 22 August 2023.
  139. ^ "ممنوعیت آزبست، انتظار شهروندان از مجلس". همشهری آنلاین (in Persian). 24 October 2011. Retrieved 22 August 2023.
  140. ^ Japanese Asbestos Scandal Archived 18 December 2012 at archive.today. Asia Monitor Resource Center. 28 September 2007
  141. ^ Asbestos use banned on all products from this month. Etoday.co.kr. Retrieved on 17 October 2015.
  142. ^ Smartt, Pamela (2004). "Mortality, morbidity, and asbestosis in New Zealand: the hidden legacy of asbestos exposure". The New Zealand Medical Journal. 117 (1205): U1153. PMID 15570336. Archived from the original on 5 June 2014.
  143. ^ "Govt moves on asbestos-containing products". The Beehive. Retrieved 16 June 2016.
  144. ^ "National Library of New Zealand". Grey River Argus, Volume LVII, Issue 9871, 8 January 1898, Page 4.
  145. ^ Blair, AK (1994). The Cobb: the history of the Cobb River hydro-electric power scheme. Christchurch, New Zealand: Cadsonbury Publications, Christchurch, 1998. pp. 67–69, 71–72, 100–101. ISBN 0-477-01699-5.
  146. ^ "학원 밀집 건물 석면노출 심각" Archived 2 April 2015 at the Wayback Machine. fnn.co.kr. 6 May 2013
  147. ^ Kim, Hyoung Ryoul (12 June 2009). "Overview of Asbestos Issues in Korea". J Korean Med Sci. 3. 24 (3): 363–367. doi:10.3346/jkms.2009.24.3.363. PMC 2698178. PMID 19543418.
  148. ^ 1970~80년대 석면 다룬 산업 근로자, 폐암 정기검사 필수 Archived 2 April 2015 at the Wayback Machine. health.joseilbo.com. 25 February 2013
  149. ^ Managing and working with asbestos – Control of Asbestos Regulations 2012 (PDF). London: Health and Safety Executive. 2013. ISBN 978-0-7176-6618-8. Archived (PDF) from the original on 16 December 2023.
  150. ^ Leer, Ben (17 September 2012), "Why Isn't Asbestos Banned in the United States?". asbestos.com.
  151. ^ McGrory, Kathleen; Bedi, Neil (7 December 2022). "Workers Across America Break Their Silence on Decades of Asbestos Exposure". ProPublica. Retrieved 9 December 2022.
  152. ^ McGrory, Kathleen; Bedi, Neil. "The U.S. Never Banned Asbestos. These Workers Are Paying the Price". ProPublica. Retrieved 9 December 2022.
  153. ^ https://law.justia.com/cases/federal/appellate-courts/F2/947/1201/153685/
  154. ^ EPA Asbestos Materials Bans: Clarification. epa.gov. 18 May 1999
  155. ^ "EPA Actions to Protect the Public from Exposure to Asbestos". United States Environmental Protection Agency. 12 March 2013. Retrieved 28 April 2020.
  156. ^ Washington State Better Brakes Law. ecy.wa.gov Archived 17 January 2012 at the Wayback Machine
  157. ^ https://pubs.usgs.gov/periodicals/mcs2024/mcs2024-asbestos.pdf
  158. ^
  159. ^ Algranti, Eduardo; Ramos-Bonilla, Juan Pablo; Terracini, Benedetto; Santana, Vilma S. Santana (29 March 2019). "Prevention of Asbestos Exposure in Latin America within a Global Public Health Perspective". Annals of Global Health. 85 (1). London: Ubiqiuity: 49. doi:10.5334/aogh.2341. ISSN 2214-9996. PMC 6634328. PMID 30924615.
  160. ^ "Asbestos in the world". HESA Newsletter. 27. Brussels: European Trade Union Institute: 12. June 2005.
  161. ^ Tấm lợp amiăng, kẻ giết người?, báo Pháp Luật, 10 July 2017, language=vietnamese
  162. ^ a b Xây dựng mạng lưới cấm sử dụng amiăng trắng ở Việt Nam, báo Pháp Luật, 27 November 2014, language=vietnamese
  163. ^ "Fiber Glass: A Carcinogen That's Everywhere". Rachel's News. Environmental Research Foundation. 31 May 1995. Archived from the original on 22 January 2021. Retrieved 4 February 2011.
  164. ^ Agents Classified by the IARC Monographs, Volumes 1–111 Archived 25 October 2011 at the Wayback Machine. iarc.fr
  165. ^ Marsh, G. M.; Buchanich, J. M.; Youk, A. O. (2011). "Fiber glass exposure and human respiratory system cancer risk: Lack of evidence persists since 2001 IARC re-evaluation". Regulatory Toxicology and Pharmacology. 60 (1): 84–92. doi:10.1016/j.yrtph.2011.02.009. PMID 21345360.
  166. ^ Dixit, B., "Performance of Protective Clothing: Development and Testing of Asbestos Substitutes", Performance of Protective Clothing, ASTM STP 900, R. L. Barker and G. C. Coletta, Eds., American Society for Testing and Materials, Philadelphia, 1986, pp. 446–460 ISBN 0-8031-0461-8.
  167. ^ Gualtieri, A. F.; Tartaglia, A. (2000). "Thermal decomposition of asbestos and recycling in traditional ceramics". Journal of the European Ceramic Society. 20 (9): 1409–1418. doi:10.1016/S0955-2219(99)00290-3.
  168. ^ Leonelli, C.; Veronesi, P.; Boccaccini, D.; Rivasi, M.; Barbieri, L.; Andreola, F.; Lancellotti, I.; Rabitti, D.; Pellacani, G. (2006). "Microwave thermal inertisation of asbestos containing waste and its recycling in traditional ceramics". Journal of Hazardous Materials. 135 (1–3): 149–55. Bibcode:2006JHzM..135..149L. doi:10.1016/j.jhazmat.2005.11.035. PMID 16406335.
  169. ^ Francesco Turci; Maura Tomatis; Stefano Mantegna; Giancarlo Cravotto; Bice Fubini (2007). "The combination of oxalic acid with power ultrasound fully degrades chrysotile asbestos fibres". Journal of Environmental Monitoring. 9 (10): 1064–1066. doi:10.1039/B709571F. PMID 17909639.
  170. ^ Asbestos-Containing Material (ACM), accessed 16 June 2020
  171. ^ "Where can you find asbestos? Asbestos Insulating Board (AIB)". www.hse.gov.uk. Archived from the original on 5 July 2022. Retrieved 7 September 2022.

Further reading

edit
edit
Retrieved from "https://en.wikipedia.org/w/index.php?title=Asbestos&oldid=1259750482"