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 within which oxygenated water is available in touch with sulfide minerals or different diminished sulfur compounds. a world Workshop was once 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 by means of open-cast lignite mining, emphasizing the customarily saw geogenic acidification after oxidation of pyrite. issues of curiosity have been case reviews at the limnology of acid lakes, e.g. bacteriologically more advantageous techniques with regards to heavy steel mobilization and acid new release, the ecology of sulfur-acidic lakes, and at the inorganic techniques of acidification. in addition, innovations for the prevention and the abatement of acidification have been addressed together with the factors of acidification, and the choices for decreasing the output of acidified groundwater from overburden dumps, for acid keep watch over 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 crew discussions concerning the subject matters pointed out above and extra difficulties that have been pointed out in the course of the assembly. The monograph supplies a baseline of the nation of technology at the around the globe challenge of geogenic adidification of lakes following human mining actions, and the way to deal with this environmental problem.
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Additional resources for Acidic Mining Lakes: Acid Mine Drainage, Limnology and Reclamation
They date back to the lower Oligocene epoch (35 - 30 million years). The coal is covered by 20 - 30 m of marine silty sands of the Rupel transgression. North of Leipzig, lignite layers date from the upper Oligocene to lower Miocene (30 - 22 million years ago). The four coal seams were worked in the Bitterfeld area. The lignite seams are separated by clay, sand, and gravel layers of fluvial origin. East and north-east of the Elbe valley, which was formed by the meltwaters of the Pleistocene glaciation period, coal in lower Miocene strata (about 20 million years old) continues to be mined today.
Locally restricted lignite seams with intercalated fine-grained sediments can be found in erosional structures such as channels and pockets. These cavities were caused by the leaching of salt, gypsum, and by karst phenomena in the basal rocks, mainly consolidated Triassic and Permian sediments. These lignite stocks are of small scale. The thickness of such lenticular coal accumulations may reach up to 100 m, such as in the Geisel valley. Similar occurrences can be found in the lignite pits of Merseburg (east), Teutschenthal, Amsdorf, and Helmstedt.
In Lake Au and Lake Murner depth profiles were measured, in Lake Au at the deepest point of the lake and in Lake Murner in the middle of the lake. In Lake Au sampling reached from the lake surface to just above the sediment at 26-m depth. In Lake Murner the surface sample was lost and therefore the profile begins in 5-m depth and ends in 35-m depth just above the sediment. pH was measured using an electrode (WTW E50). Dissolved sulphate was measured photometrically after precipitation as BaS04 (Tabatai 1974).
Acidic Mining Lakes: Acid Mine Drainage, Limnology and Reclamation by W. Geller, H. Klapper, M. Schultze (auth.), Prof. Dr. Walter Geller, Prof. Dr. Helmut Klapper, Prof. Dr. Wim Salomons (eds.)