Reliance on existing wetlands for pollution control around the Witwatersrand gold/uranium mines of South Africa - Are they sufficient?
- 236 Downloads
The gold deposits of the Witwatersrand contain appreciable concentrations of uranium, which have at times been exploited commercially. Conditions downstream of mines have led to the development of extensive wetland systems, which have been shown to concentrate heavy metals including uranium and uranium series radionuclides from water discharged by mining operations and leachates derived from mine wastes. While these wetlands act as pollution sinks, geochemical simulations and models indicate that metals may be remobilised and pose a hazard to downstream water users.
KeywordsGold Deposit Mining Area Sequential Extraction Informal Settlement Wetland Sediment
Unable to display preview. Download preview PDF.
- IWQS (1999)Report on the Radioactivity Monitoring Programme in the Mooi River (Won-derfonteinspruit) Catchment. Institute for Water Quality Studies. Department of Water Affairs and Forestry. Report No.: N/C200/00//RPQ/2399.Google Scholar
- Ure A M, Quevauviller P H, Muntau H and Griepink B (1993) Speciation of Heavy Metals in Soils and Sediments. An Account of the Improvement and Harmonization of Extraction Techniques Undertaken under the Auspices of the BCR of the Commission of the European Communities.Intern. J. Environ. Anal. Chem., 51, 135.Google Scholar
- Wade P W, Woodborne S, Morris M W, Vos P and Jarvis N V (2001) Tier 1 risk assessment of selected radionuclides in sediments of the Mooi River Catchment, Water Research Commission, Pretoria, 107pp.Google Scholar