Redox buffering in shallow aquifers contaminated by leachate
- Technical Univ. of Denmark, Lyngby (Denmark). Inst. of Environmental Science and Engineering
The redox conditions in two Danish landfill leachate-polluted aquifers (the Vejen and Grindsted) are discussed in terms of redox buffering. Dominant leachate contributors to reduction capacity (RDC) are dissolved organic matter and ammonium. Aquifer oxidation capacity is dominated by Fe(III) oxides, and the Vejen Landfill case shows that redox buffering by reduction of Fe(III) oxides may be important for plume development. Inorganic precipitates such as pyrite and other Fe(II) minerals may dramatically increase the oxygen demand of the aquifer. In mineral-poor aquifers such as the lower aquifer at Grindsted Landfill, redox buffering by solid electron acceptors is far less important, and smaller quantities of reduced species are formed.
- OSTI ID:
- 464897
- Report Number(s):
- CONF-950483--; ISBN 1-57477-002-0
- Country of Publication:
- United States
- Language:
- English
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