Limestone Neutralisation of Arsenic-Rich Effluent from a Gold Mine

Traditionally acid mine water is neutralised with lime. Limestone is a cheaper alternative for such applications. A case study showed that limestone can be used effectively to replace lime for the neutralization of arsenic rich acid water. The cost of limestone treatment is 45.8% less than that of l...

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Bibliographic Details
Published in:Mine water and the environment 2008-03, Vol.27 (1), p.46-51
Main Authors: de Beer, M., Mathews, E. H., Krueger, D., Maree, J., Mbhele, N., Phalanndwa, M., Novhe, O.
Format: Article
Language:English
Subjects:
Acid mine drainage
Acid mine water
Acidity
Acids
Arsenic
Calcium carbonate
Earth and Environmental Science
Earth Sciences
Ecotoxicology
Effluents
Geology
Gold mines & mining
Heavy metals
Hydrogeology
Industrial Pollution Prevention
Laboratories
Landfill
Landfills
Leachates
Lime
Limestone
Magnesium
Mine drainage
Mineral Resources
Neutralization
Oxidation
Sludge
Technical Communication
Waste disposal sites
Water Quality/Water Pollution
Water treatment
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Summary:Traditionally acid mine water is neutralised with lime. Limestone is a cheaper alternative for such applications. A case study showed that limestone can be used effectively to replace lime for the neutralization of arsenic rich acid water. The cost of limestone treatment is 45.8% less than that of lime. The acidity can be removed from 33.5 to 0.06 g/L (as CaCO 3 ). The study also showed no significant differences in the TCLP characteristics of the resultant sludge when water is treated with lime or with limestone. Sludge from the limestone treatment process can be disposed of on a non-hazardous landfill site.
ISSN:1025-9112
1616-1068
DOI:10.1007/s10230-007-0023-3