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Silica exposure is also associated with lung cancer, chronic obstructive pulmonary disease, respiratory symptoms, ... Murray J. Risk of pulmonary tuberculosis relative to silicosis and exposure to silica dust in South African gold miners [published erratum appears in Occup Environ Med 1999 Mar;56(3):215–6]. Occup Environ Med. …
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Hnizdo E. Loss of lung function associated with exposure to silica dust and with smoking and its relation to disability and mortality in South African gold miners. ... Hnizdo E, Murray J. Risk of pulmonary tuberculosis relative to silicosis and exposure to silica dust in South African gold miners. Occup Environ Med. 1998 Jul; 55 (7):496–502.
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The combined effect of underground gold mining dust with a high content of free silica and tobacco smoking on the prevalence of respiratory impairment was examined among 2209 South African gold ...
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During mechanical processes such as crushing, cutting, drilling, or grinding of natural stone, or man-made products that contain silica, workers generate silica dust commonly referred to as respirable crystalline silica (RCS) . Silica dust particles with size from 0.01 to 100 μm in diameter are a significant health concern .
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Results. All bulk dust samples consisted mostly of crystalline silica (73.14–87.09%). Large percentages of nanoparticles were identified in all bulk samples (66.8–70.7%) indicating the possibility of the dust to lodge deep within the lungs. The crystalline silica levels obtained from ambient PM 10 sampling and personal PM 4 …
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Silica dusts are associated with specific types of dermatitis or skin inflammation. A dry, dusty environment can promote minor skin reactions. These irritations are not expected to initiate long-term chronic skin disorders, however. Long-term dermal exposures to silica dusts are associated with connective tissue diseases with a potential to produce
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Silica exposure is also associated with lung cancer, chronic obstructive pulmonary disease, respiratory symptoms, ... Hnizdo E, Murray J. Risk of pulmonary tuberculosis relative to silicosis and exposure to silica dust in South African gold miners [published erratum appears in Occup Environ Med 1999 Mar;56(3):215–6].
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Silica dust is a known cause of silicosis and lung cancer, and is strongly linked to TB and other lung diseases. An estimated 15 million artisanal miners worldwide …
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It is an irreversible, fibrotic lung disease specifically caused by exposure to respirable crystalline silica (RCS) dust. Over 20,000 incident cases of... Current global …
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Older in-service gold miners in South Africa have a high prevalence of PTB, which is significantly associated with dust and silica exposure, even in the absence of silicosis. Limitations include a ...
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Silica. Print. Photo by NIOSH. Millions of U.S. workers are exposed to respirable crystalline silica (RCS) in a variety of industries. Silica dust is made up of small particles that can become airborne during work activities with materials that contain silica. Particles that are small enough to be inhaled deep into the lungs are called respirable.
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Tel.: 1-412-386-6460; Fax: 1-412-386-4917 E-mail address: [email protected] 16285). The current Mine Safety and Health Administration (MSHA) rule for the mining industry remains an 8-hour TWA concentration of 100 μg m–3, controlled indirectly by reducing the respirable dust standard (30 CFR 56.5001; 30.
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Characterizing Particle Size Distributions of Crystalline Silica in Gold Mine Dust. Aerosol Air Qual. Res. 17: 24-33. https://doi/10.4209/aaqr.2016.05.0179. …
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Abstract. Occupational exposure to silica occurs at workplaces in factories like quartz crushing facilities (silica flour milling), agate, ceramic, slate pencil, glass, stone quarries and mines, etc., Non-occupational exposure to silica dust can be from industrial sources in the vicinity of the industry as well as non-industrial sources.
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Taylor & Francis. Summary: Silica dust hazards in large gold mines have been well documented, but the situation is far worse in small-scale gold mining …
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There are very few available silica dust measurements from the platinum mines because the silica content of the dust is not routinely measured (20). One study calculated the crystalline silica content of crushed stope rock samples from two platinum mines as 0.45%, compared with 9.9 and 39.1% in two gold mines (21). The silica content of ...
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Exposure to silica dust is a risk factor for the development of PTB in the absence of silicosis, even after exposure to silica dust ends. ... Risk of pulmonary tuberculosis relative to silicosis and exposure to silica dust in South African gold miners Occup Environ Med . 1998 ... For the whole cohort, the factors associated with increased risk ...
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Such characterization could improve monitoring techniques and control technologies for crystalline silica, decreasing worker exposure to silica and preventing future incidence of silicosis. Three gold mine dust samples were aerosolized in a laboratory chamber. Particle size-specific samples were collected for gravimetric analysis and for ...
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2. Granite. Granite is a complex stone, which is why it comes in so many colors. It's loosely defined as a coarse-grained, quartz-rich, intrusive igneous rock. Auriferous granite often contains gold-bearing quartz veins as well, and these veins are generally sought out first by miners due to their higher gold content.
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Older in‐service gold miners in South Africa have a high prevalence of PTB, which is significantly associated with dust and silica exposure, even in the absence of silicosis. Limitations include a survivor workforce and the use of cumulative exposures based on current exposures. Dust control is an important component in control of the PTB ...
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There are new cancer links with silica, including women and nonsmokers with excess lung cancer; excess lung cancer among patients with CWP; children's dust …
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The present study of exposure levels of diesel particulate matter, respirable dust, crystalline silica, and noise during underground gold mining demonstrates that better control mechanisms are needed to protect workers.
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Given the aforementioned, much-existing literature Csavina et al. 2012; Rees and Murray 2020; Sarver et al. 2021;Vanka et al. 2022) have tried to examine the mechanisms of industrial mine dust ...
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ABSTRACTDust containing crystalline silica is common in mining environments in the U.S. and around the world. The exposure to respirable crystalline silica remains an important occupational issue and it can lead to the development of silicosis and other respiratory diseases. Little has been done with regard to the characterization of the …
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Background: A nested case-control study for lung cancer was performed on a cohort of 2260 South African gold miners in whom an association between exposure to silica dust and risk of lung cancer was previously reported. The objective was to investigate an expanded set of risk factors and also cancer cell type. Methods: The 78 cases of lung …
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Respirable silica dust, also known as respirable crystalline silica (RCS), is a natural substance found in rocks during the mining process, and is a major harmful contaminant for miners. This fine ...
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Silica dust can originate from various sources across different industries and work environments. Silica-containing products can emit dust particles during cutting, crushing, drilling, polishing, sawing, or grinding. Such minute particles can penetrate the lungs and lead to various health problems, including silicosis.
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At the most fundamental level, there needs to be increased awareness and surveillance of the risks associated with silica dust exposures and more effective methods of control. To contribute towards global silicosis elimination strategies, there is an urgent need for countries worldwide to adopt more protective RCS OELs exposure standards ...
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In South Africa between 1973 and 2013 an estimated minimum 1.2 million workers passed through the gold mining industry with its high silica dust exposures [1, 2]. Of other middle income countries India has approximately 11.5 million people working in silica-exposed jobs, Brazil over 2 million, while China is thought to have the largest …
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include, phosphate, iron, copper, gold, lead, silver, zinc and other mineral deposits. Although these minerals are dotted all over the country, Mahd Ad Dhahab gold mine is …
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