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Author (up) Potgieter-Vermaak, S.S.; Potgieter, J.H.; Monama, P.; Van Grieken, R. url  openurl
  Title Comparison of limestone, dolomite and fly ash as pre-treatment agents for acid mine drainage Type Journal Article
  Year 2006 Publication Minerals Engineering Abbreviated Journal  
  Volume 19 Issue 5 Pages 454-462  
  Keywords Acid rock drainage Mining Tailings Environmental  
  Abstract The physical, chemical and biological nature of Vaal Dam water, the main source of water in Gauteng, South Africa, is often affected by underground water pollution (acid mine water) and industrial effluents. The ecological significance and detrimental effects necessitate investigations into treating the water prior to discharge into public streams. Although several acid mine water treatment techniques and methods exist, they all have certain disadvantages. Lime treatment is the most common approach. In this investigation, limestone, dolomite and fly ash were selected as pre-treatment agents based on their low cost. Simulated acid mine water containing these agents was tested using a Jar Test apparatus. Samples were analyzed before and after treatment for pH, ferrous, ferric, calcium, magnesium and sulphate ions. The study demonstrated that the quality of the water improved with an increase in the amount and surface area of the raw material dosed and an increase in contact time. It was also influenced by the chemical composition of the acid mine water and aeration. Chemical cost savings of 38% are achieved when lime is replaced with limestone, and cost savings of 23% and 48% can be accomplished when limestone is substituted with dolomite and fly ash respectively. This could result in significant savings to the gold and coal mining industries, and could lead to a mutual benefit/gain between industrialists/polluters and the public.  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0892-6875 ISBN Medium  
  Area Expedition Conference  
  Notes Apr.; Comparison of limestone, dolomite and fly ash as pre-treatment agents for acid mine drainage; Science Direct Approved no  
  Call Number CBU @ c.wolke @ 17461 Serial 42  
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