How does landfill leachate affect the chemical processes in a lake system downgradient from a landfill site? |
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| Authors: | Thomas Striebel Wolfgang Schäfer Stefan Peiffer |
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| Institution: | (1) Lehrstuhl für Hydrologie, Universität Bayreuth, Postfach 101251, D-8580 Bayreuth, Germany;(2) Lehrstuhl für Hydrologie, Universität Bayreuth, D-3500 Kassel, Germany;(3) Limnologische Forschungsstation, Universität Bayreuth, Postfach 101251, D-8580 Bayreuth, Germany;(4) Present address: Fachbereich Bauingenieurwesen, Universität Kassel, D-3500 Kassel, Germany |
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| Abstract: | A field study on the geochemical properties of a chemically-stressed limnic environment was performed in Lake Silbersee, which receives leachate water of high inorganic loading from an upgradient landfill site. The highly concentrated sulfate ion in groundwater, when entering the pore water system of the lake, gives rise to an intensive microbial sulfate reduction. A diagenetic approach was used to explain the existence of a marine-like aqueous system within a geologically slightly acidic aquifer, consisting of a well-buffered lake water and an alkalinity producing, excess sulphide containing sediment pore water system. |
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| Keywords: | Landfill leachates pH regulation groundwater sediment-water interaction sulfate reduction alkalinity |
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