Anaerobic microbial redox processes in a landfill leachate contaminated aquifer (Grindsted, Denmark)

摘要

The distribution of anaerobic microbial redox processes was investigated along a 305 m long transect of a shallow landfill-leachate pollute aquifer. By unamended bioassays containing sediment and groundwater, 37 samples were investigated with respect to methane production, sulfate, iron, and manganese reduction, and denitrification. Methane production was restricted to the most reduced part of the plume with rates of 0.003-0.055 nmol CH_4/g dry weight/day. Sulfate reduction was observed at rates of maximum 1.8 nmol SO~2+_4/g dry weight/day along With methane production in the plume, but sulfate reduction was also observed further downgradi- Ent of the landfill.