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- W2766048123 abstract "Unlike occupational silica exposures, the association between non-occupational silica exposures and adverse health effects is not well researched, despite its occurrence in communities close to dust-generating sources such as tailings storage facilities (TSFs). Recent studies have shown that communities surrounding TSFs in South Africa often complain about the onset of dust-related health effects. Even though international interim non-occupational crystalline silica limits have been established, South Africa is yet to enforce its own limits for residential areas close to TSF sites.The objective of the study was to assess the need to enforce non-occupational crystalline silica limits for South Africa.The methods involved (1) Quantifying the silica polymorph content in bulk dust collected from TSFs in South Africa; (2) Assessing the possibility of the dust to reach surrounding communities through ambient and personal filter sampling and; (3) Conducting risk characterisation for both cancer and non-cancer endpoints.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 PM10 sampling and personal PM4 sampling all exceeded the international crystalline silica interim limits and reached maximum levels of 90 and 50.9 μg·m− 3, respectively. For three TSFs, sampling sites close to the TSFs showed higher PM4 silica levels compared to sites further from TSFs. Risk characterisation revealed the possibility of cancer and non-cancer health effects when chronically exposed to silica levels recorded during the study.The results indicate unacceptable crystalline silica exposures in surrounding communities and the need for enforcement of an ambient silica limit for South Africa." @default.
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- W2766048123 date "2017-10-01" @default.
- W2766048123 modified "2023-10-17" @default.
- W2766048123 title "Can occupational exposure to crystalline silica in ceramic industries affect the immune parameters?" @default.
- W2766048123 doi "https://doi.org/10.1016/j.toxlet.2017.07.629" @default.
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