vermiculite ore exposed
Workers Exposed To Libby Vermiculite Ore Have High Rate
2022-1-17 · Workers Exposed To Libby Vermiculite Ore Have High Rate Of Chest Wall Abnormalities Date: July 10, 2005 Source: University of Cincinnati Summary: More than one-quarter of tested workers at an Ohio ...
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Workers exposed to Libby Vermiculite Ore have | EurekAlert!
2005-5-24 · More than one-quarter of tested workers at an Ohio manufacturing plant historically exposed to asbestos-containing vermiculite ore exhibited signs of
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Workers Exposed To Libby Vermiculite Ore Have High Rate
Workers Exposed To Libby Vermiculite Ore Have High Rate Of Chest Wall Abnormalities. SAN DIEGO -- More than one-quarter of tested workers at an Ohio manufacturing plant historically exposed to asbestos-containing vermiculite ore exhibited signs of scarring of the chest wall lining, a study by researchers from the University of Cincinnati has found.
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(PDF) Mortality of vermiculite miners exposed to tremolite
The vermiculite ore as fed to the mill contained 4-6% of amphibole fibre in the tremolite series. Vital status was established in all but one of the 406 and death certificates were obtained and ...
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Cohort Study of Mortality of Vermiculite Miners Exposed
The vermiculite ore as fed to the mill contained 4-6% of amphibole fibre in the tremolite series. Vital status was established in all but one of the 406 and ... Cohort study of mortality of vermiculite miners exposed to tremolite 439 MINERALOGY It is well established that the vermiculite deposit in Libby is contaminated by asbestiform fibres.17 ...
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Researchers to Assess Effects of Town's Vermiculite Ore ...
2009-11-5 · According to researchers at Mount Sinai School of Medicine, thousands of residents and workers in Libby, Mont., have been exposed to asbestos-contaminated vermiculite ore for nearly a century ...
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MORTALITY OF VERMICULITE MINERS EXPOSED TO
1988-1-1 · MORTALITY OF VERMICULITE MINERS EXPOSED TO TREMOLITE H. E. AMANDUS,* R. W H E E L E R , * B. G. A R M S T R O N G , ! ... by groups from NIOSH and McGill University among past and present employees of a Montana mine and mill where the vermiculite ore is contaminated by amphibole fibres, mainly of the tremoliteactinolite series.
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Vermiculite Health, Safety and Environmental Aspects
2014-12-16 · Addison, J. “Vermiculite: A Review of the Mineralogy and Health Effects of Vermiculite Exploitation” Regulatory Toxicology and Pharmacology 21, 397-405, 1995. Amandus, H.E., Wheeler, R., Jankovic, J., and Tucker, J. “The Morbidity and Mortality of Vermiculite Miners and Millers Exposed to Tremolite-Actinolite: Part I, Exposure Estimates”
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VERMICULITE IS NOT ASBESTOS
2014-12-1 · Vermiculite ore deposits, like most other rocks, contain an assemblage of other minerals besides the vermiculite (Addison and Davies 1990). There may be major components such as feldspars, pyroxenes, amphiboles, carbonates, and quartz, as well as minor components such as phosphates, iron oxides, titanium oxides and zircon (Atkinson et al 1982).
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Exposure to Asbestos-Containing Vermiculite Ore and ...
ore was mined beginning in the 1920s by the Zonolite Company and then later by W.R. Grace, which bought the mine in 1963. It is estimated that between 1924 and 1990, when the mine was closed, a total of 5.8 million tons of vermiculite ore was mined and dis tributed (Kuntz et al. 2009), making Zonolite Mountain the largest vermiculite ore mine in
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Cohort Study of Mortality of Vermiculite Miners Exposed
The vermiculite ore as fed to the mill contained 4-6% of amphibole fibre in the tremolite series. Vital status was established in all but one of the 406 and ... Cohort study of mortality of vermiculite miners exposed to tremolite 439 MINERALOGY It is well established that the vermiculite deposit in Libby is contaminated by asbestiform fibres.17 ...
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Modeling community asbestos exposure near a vermiculite ...
2011-2-23 · Contaminated vermiculite ore from Libby, Montana was processed in northeast Minneapolis from 1936 to 1989 in a densely populated urban residential neighborhood, resulting in non-occupational ...
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Researchers to Assess Effects of Town's Vermiculite Ore ...
2009-11-5 · According to researchers at Mount Sinai School of Medicine, thousands of residents and workers in Libby, Mont., have been exposed to asbestos-contaminated vermiculite ore for nearly a century ...
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MORTALITY OF VERMICULITE MINERS EXPOSED TO
1988-1-1 · MORTALITY OF VERMICULITE MINERS EXPOSED TO TREMOLITE H. E. AMANDUS,* R. W H E E L E R , * B. G. A R M S T R O N G , ! ... by groups from NIOSH and McGill University among past and present employees of a Montana mine and mill where the vermiculite ore is contaminated by amphibole fibres, mainly of the tremoliteactinolite series.
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(PDF) Mortality in a cohort of vermiculite miners exposed ...
Prior to the early 1990s, between 50 to 80% of the world's supply of vermiculite ore was mined near Libby, Montana, where sodic-calcic elongate amphiboles 1
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Asbestos Mines - Vermiculite Mining & Asbestos Exposure
2021-10-7 · Miners of vermiculite, talc and taconite have been exposed to asbestos in contaminated deposits. Exposure was highest before asbestos regulations were implemented in the 1970s, but active vermiculite, talc and taconite mines in the U.S. remain contaminated with asbestos and pose an exposure threat to current miners.
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US: Vermiculite Products Could Expose Consumers to ...
2000-2-15 · The vermiculite ore at a mine in Libby, Montana, was contaminated with tremolite. For more than 60 years, W.R. Grace &amjp; Co. dug vermiculite ore out of the Zonolite Mountain in Libby. Vermiculite is a volcanic mineral compound that expands when wet.
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A risk assessment for exposure to grunerite asbestos ...
1999-3-30 · Vermiculite Ore Containing Tremolite Asbestos. The mineral vermiculite has the generalized chemical formula (Mg, Ca) 0.35 (Mg, Fe, Al) 3 (Al, Si) 4 O 10 (OH) 2 nH 2 O. On heating, the mineral loses water rapidly and expands to form a lightweight aggregate used for various purposes, e.g., insulation, soil conditioning, and filter medium.
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CHS - Examples - Libby, Montana - Community
2013-7-3 · Mine workers and Libby residents were exposed to asbestos released into the air due to mining operations for vermiculite ore and vermiculite processing in Libby. In addition, family members of mine workers were exposed to asbestos that workers brought home on their work clothing. This study was based on 123 people who had lived in Libby, worked ...
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Limiting Potential Exposures of Workers to Asbestos ...
Vermiculite ore mined near Libby, Montana, which accounted for more than half the worldwide production of vermiculite from 1925 to 1990, was contaminated with asbestos and asbestos-like fibers. Workplace exposure to these fibers caused a serious health problem in local miners and millers, as well as some downstream workers.
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Health of vermiculite miners exposed to trace amounts of ...
There were four deaths from lung cancer and 3.31 expected (SMR 1.21, 95% CI 0.33-3.09). Three of the four deaths were in the lowest exposure category (less than 1 f/ml y); no death was attributed to mesothelioma or pneumoconiosis. These findings contrast with those in Montana where the vermiculite ore was heavily contaminated with fibrous ...
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Exposure to Asbestos-Containing Vermiculite Ore and ...
ore was mined beginning in the 1920s by the Zonolite Company and then later by W.R. Grace, which bought the mine in 1963. It is estimated that between 1924 and 1990, when the mine was closed, a total of 5.8 million tons of vermiculite ore was mined and dis tributed (Kuntz et al. 2009), making Zonolite Mountain the largest vermiculite ore mine in
Read More
MORTALITY OF VERMICULITE MINERS EXPOSED TO
1988-1-1 · MORTALITY OF VERMICULITE MINERS EXPOSED TO TREMOLITE H. E. AMANDUS,* R. W H E E L E R , * B. G. A R M S T R O N G , ! ... by groups from NIOSH and McGill University among past and present employees of a Montana mine and mill where the vermiculite ore is contaminated by amphibole fibres, mainly of the tremoliteactinolite series.
Read More
Researchers to Assess Effects of Town's Vermiculite Ore ...
2009-11-5 · According to researchers at Mount Sinai School of Medicine, thousands of residents and workers in Libby, Mont., have been exposed to asbestos-contaminated vermiculite ore for nearly a century ...
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An examination of I Arbertor National eview I
2006-8-31 · exposed to the asbestos con- tained in the vermiculite ore. Background Vermiculite, which is used in lawn and garden products, various building materials, and in insulation, was mined and processed in Libby, MT, from the early 1920s until 1990. Although most vermiculite products pose no health problem, the vermiculite ore from the
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US: Vermiculite Products Could Expose Consumers to ...
2000-2-15 · The vermiculite ore at a mine in Libby, Montana, was contaminated with tremolite. For more than 60 years, W.R. Grace &amjp; Co. dug vermiculite ore out of the Zonolite Mountain in Libby. Vermiculite is a volcanic mineral compound that expands when wet.
Read More
A risk assessment for exposure to grunerite asbestos ...
1999-3-30 · Vermiculite Ore Containing Tremolite Asbestos. The mineral vermiculite has the generalized chemical formula (Mg, Ca) 0.35 (Mg, Fe, Al) 3 (Al, Si) 4 O 10 (OH) 2 nH 2 O. On heating, the mineral loses water rapidly and expands to form a lightweight aggregate used for various purposes, e.g., insulation, soil conditioning, and filter medium.
Read More
It’s Your Health
2020-9-30 · qualities. Of concern is vermiculite ore produced by the Libby Mine in Montana from the 1920's to 1990. It was sold as Zonolite® Attic Insulation and possibly other brands in Canada during that time. Vermiculite from the Libby Mine may contain amphibole asbestos. The Libby Mine supplied the majority of the world market in vermiculite-based ...
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CHS - Examples - Libby, Montana - Community
2013-7-3 · Mine workers and Libby residents were exposed to asbestos released into the air due to mining operations for vermiculite ore and vermiculite processing in Libby. In addition, family members of mine workers were exposed to asbestos that workers brought home on their work clothing. This study was based on 123 people who had lived in Libby, worked ...
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