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- W2065702980 abstract "This paper reports detailed O2 measurements of pyrite bearing sediments in a column study and their interpretation based on a hydrogeochemical modelling approach. The research focuses on the quantitative effects of effective diffusion and microbiologic activity on pyrite weathering and acidification. A column experiment was set up and O2 saturation and moisture contents were monitored over 100 days. The anoxic material used for the column experiment was taken from a sediment core of a mining waste dump in the southern periphery of the Lohsa storage system in the Lusatia region of Germany. The measured O2 breakthrough curves were modelled using the simulator SAPY, a one-dimensional reactive transport code which considers the kinetics of chemical reactions and the delivery of O2 into the sediment. The simulation yielded a strong dependence of pyrite oxidation on the moisture content which was quantified by an empirical equation. It was shown that the oxidation rate was catalysed by microbial activity exceeding the rate of diffusive O2 delivery. In order to develop a management tool for predictive issues the results have already been applied to natural environments in another study using the adapted model." @default.
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- W2065702980 date "2007-01-01" @default.
- W2065702980 modified "2023-09-26" @default.
- W2065702980 title "Effective diffusion and microbiologic activity as constraints describing pyrite oxidation in abandoned lignite mines" @default.
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- W2065702980 doi "https://doi.org/10.1016/j.apgeochem.2006.09.003" @default.
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