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Author (up) Hedin, R.S.; Nairn, R.W.; Kleinmann, R.L.P. openurl 
  Title Passive Treatment of Coal Mine Drainage Type Journal Article
  Year 1994 Publication Bureau of Mines Information Circular Abbreviated Journal  
  Volume Ic-9389 Issue Pages 1-35  
  Keywords wetland Grubenwasser treatment Wasserreinigung Wasserbehandlung mine water  
  Abstract Passive methods of treating mine water utilize chemical and biological processes that decrease metal concentrations and neutralize acidity. Compared to conventional chemical treatment, passive methods generally require more land area, but utilize less costly reagents and require less operational attention and maintenance. Currently, three types of passive technologies exist: aerobic wetlands, wetlands that contain an organic substrate, and anoxic limestone drains. Aerobic wetlands promote mixed oxidation and hydrolysis reactions, and are most effective when the raw mine water is net alkaline. Organic substrate wetlands promote anaerobic bacterial activity that results in the precipitation of metal sulfides and the generation of bicarbonate alkalinity. Anoxic limestone drains generate bicarbonate alkalinity and can be useful for the pretreatment of mine water before it flows into a wetland. Rates of metal and acidity removal for passive systems have been developed empirically. Aerobic wetlands remove Fe and Mn from alkaline water at rates of 10-20 g×m-2×d-1 and 0.5-1.0 g×m-2×d-1, respectively.  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0096-1914 ISBN Medium  
  Area Expedition Conference  
  Notes Passive Treatment of Coal Mine Drainage; 1; abgegeben an TUFG 100700 / 0 13 Abb., 19 Tab.; AMD ISI | Wolkersdorfer Approved no  
  Call Number CBU @ c.wolke @ 17474 Serial 355  
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