Acidic Mining Lakes: Acid Mine Drainage, Limnology and by W. Geller, H. Klapper, M. Schultze (auth.), Prof. Dr. Walter

By W. Geller, H. Klapper, M. Schultze (auth.), Prof. Dr. Walter Geller, Prof. Dr. Helmut Klapper, Prof. Dr. Wim Salomons (eds.)

Acidification is a common challenge in any respect mining websites during which oxygenated water is available in touch with sulfide minerals or different diminished sulfur compounds. a world Workshop used to be held in September 1995 on the division for Inland Water study of the UFZ-Centre for Environmental examine in Magdeburg at the limnology of lakes created through open-cast lignite mining, emphasizing the usually saw geogenic acidification after oxidation of pyrite. themes of curiosity have been case reviews at the limnology of acid lakes, e.g. bacteriologically stronger strategies relating to heavy steel mobilization and acid new release, the ecology of sulfur-acidic lakes, and at the inorganic tactics of acidification. in addition, strategies for the prevention and the abatement of acidification have been addressed together with the reasons of acidification, and the choices for lowering the output of acidified groundwater from overburden dumps, for acid keep an eye on in the course of the flooding of open-cast mines, and power measures for prompted in situ organic neutralization. This quantity has 25 chapters together with a bankruptcy with result of staff discussions in regards to the issues pointed out above and extra difficulties that have been pointed out in the course of the assembly. The monograph supplies a baseline of the kingdom of technological know-how at the around the world challenge of geogenic adidification of lakes following human mining actions, and the way to deal with this environmental problem.

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Extra resources for Acidic Mining Lakes: Acid Mine Drainage, Limnology and Reclamation

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Environmental Science Series. Springer, Berlin Heidelberg New York, pp 89 -105 Singer PC, Stumm W (1970) Acid mine drainage: rate-determining step. Science 167: 1121-1123 Stumm W, Morgan JJ (1981) Aquatic chemistry, 2nd edn. , Saxony). Int Rev Ges Hydrobiol 80: 15 - 25 Van Berk W (1987) Hydrochemische Stoffumsetzungen in einem Grundwasserleiter beeinfluBt durch eine Steinhohlenbergehalde. Besondere Mitteilungen zum Dtsch Gewasserkdl Jahrb 49: 1-175 Wisotzky F (1994) Untersuchungen zur Pyritoxidation in Sedimenten des Rheinischen Braunkohlenreviers und deren Auswirkungen auf die Chemie des Grundwassers.

4 Summary Our survey shows the influence of FeS2 oxidation and acid mine drainage on the chemical composition of lake water and sediments. Increased input of the mobilized compounds, mainly acidity, sulphate, AI, Fe and Mn, and the good solubility of most of the metals at low pH result in high concentrations 44 K. Friese et al. of the dissolved compounds in the acidic lakes. Although some lakes are neutral, their ionic composition indicates pyrite oxidation in their catchment area. In these lakes acidity is buffered by more calcareous soil composition, riverine water throughflow or other human activities.

1 Composition of Lake Water The lakes under investigation can be divided into two distinct groups according to their pH values (Fig. 3): one group with pH values below 4 and the other with pH values between 6 and 8. The observed pH distributions are caused by a Fe(OH)x-buffering system and a CO 2 -bicarb onate-carbonate-buffering system, respectively. The Fe(OH)x-buffering system is based on the different species of iron oxyhydroxides and correlates with high concentrations of iron, reaching maximum values of 200 mg/I.

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