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dc.contributor.advisor Edwards, A. Khoza, Norman Nkuzi
dc.contributor.other Kekana, M. P. 2013-04-11T07:29:29Z 2013-04-11T07:29:29Z 2012
dc.description Thesis (MPH. (Occupational and Environmental Health))-- University of Limpopo, 2012 en_US
dc.description.abstract Background: The objective of this study was to quantify personal time-weighted average respirable dust and silica exposure of workers at foundries in Gauteng and to rank the occupations in foundries according to the risk of exposure to silica quartz. Methods: A task-based risk assessment of 56 personal samples from two foundries was conducted. Personal exposure data was collected from workers’ breathing zones for the full working shift. All analyses of samples for silica dust were carried out in the CSIR Centre for Mining Innovation’s Laboratory, which has SANAS accreditation (ISO 17025) for both x-ray powder diffraction and particle size analysis methods. Results: The personal time-weighted average mean and median respirable silica dust concentration was 0.184 mg/m³ and 0.167 mg/m³ respectively. The maximum exposure concentration was 0.835 mg/m³ and minimum exposure was 0.010 mg/m³. The occupations within the foundries with the highest exposures were moulders, sand mixers, furnace operators and the lowest exposed occupations were grinders, closers, and casting operators. The majority of foundry workers (62%) in both foundries are exposed to respirable silica dust at above the South African occupational exposure level (OEL). Conclusion and recommendations: Foundry workers are over-exposed to respirable silica dust and are potentially at high risk of contracting silicosis and other occupational diseases associated with respirable silica dust. It is recommended that a dust control programme be implemented and a baseline study be conducted. en_US
dc.format.extent Thesis (MPH. (Occupational Environmental Health)) --University of Limpopo, 2012 en_US
dc.language.iso en en_US
dc.relation.requires Adobe acrobar reader, version 6 en_US
dc.subject Foundry workers en_US
dc.subject Silica dust en_US
dc.subject Industrial hygiene en_US
dc.subject.lcsh Silica dust en_US
dc.subject.lcsh Silica -- Toxicology en_US
dc.subject.lcsh Silicosis en_US
dc.subject.lcsh Occupational diseases en_US
dc.subject.lcsh Lungs -- Dust diseases en_US
dc.subject.lcsh Foundries -- Dust control en_US
dc.title Respirable crystalline silica dust exposure amongst foundary workers in Gauteng (South Africa) : a task-based risk assessment en_US
dc.type Thesis en_US

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