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 lowered sulfur compounds. a world Workshop was once held in September 1995 on the division for Inland Water examine of the UFZ-Centre for Environmental study in Magdeburg at the limnology of lakes created through open-cast lignite mining, emphasizing the customarily saw geogenic acidification after oxidation of pyrite. themes of curiosity have been case reports at the limnology of acid lakes, e.g. bacteriologically more advantageous procedures concerning heavy steel mobilization and acid new release, the ecology of sulfur-acidic lakes, and at the inorganic techniques of acidification. in addition, suggestions for the prevention and the abatement of acidification have been addressed together with the reasons of acidification, and the choices for decreasing the output of acidified groundwater from overburden dumps, for acid regulate through 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 team discussions concerning the subject matters pointed out above and additional difficulties that have been pointed out throughout the assembly. The monograph supplies a baseline of the country of technology at the world wide challenge of geogenic adidification of lakes following human mining actions, and the way to deal with this environmental problem.

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In Lake Edelmann and Lake Murner a significant fraction of the TRIS is AVS (79 and 61 % respectively; the percentages refer to the depth-integrated contents). In Lake Murner there is also elemental sulphur (32 % of TRIS). In Lake Au most of the TRIS should be FeS 2 • In Lake Edelmann and Lake Murner the organic carbon content was high in the first centimetres below the sediment - water interface. In Lake Murner increased concentrations were found only in the first 3 cm, with 23 % (w/w) in the upper centimetre.

In the future, mining in the central German district will be restricted to only three open pits: United Schleenhain, Profen, and Amsdorf. Another center of coal mining in eastern Germany is the Lusatian lignite mining district. This vast area contains 13 billion tons of lignite (proven reserves), or one-quarter of the total German reserves. The Lusatian lignite mining district comprises two lithologically different areas: the economically more important area of Lower Lusatia, situated mainly in Branden- 2 Regional Geology of the Lignite Mining Districts in Eastern 19 burg, and the area of Upper Lusatia in Saxony.

Hence, particularly in the upper 10 cm, ferric iron is the dominant fraction of total dissolved iron. 5 to 7 (Fig. 5 d). ----. -. Lake Au - - Lake Murner 20 •. ~ : • i ,:;. ~ e'e -10 :>r .... < ........ . -. -. -. Lake Murner -. o -------------------....... ••• -10~~ ....... 1 r----------, 20 ~ -<.. -- 30 . J o sot [mmoVl] 30 . - - - - - - - - - - - , 30 . - - - - . -. ,.. -. _ Lake Murner .. -" •••• •• I';>· - -- - -- - - - - - - - - - .... : --===-. L................. 234 5 6 d 7 pH Fig. 5 a-d.

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