Analysis of substrates to support a halorespiration enhanced redox transition zone in chlorinated solvent impacted groundwater

摘要

The ability of three different polymeric organic materials (POMs) to create redox conditions favorable for reductive dechlorination was evaluated over a period of 70 days. Corn crop residue, unrefined chitin, and wood shavings were mixed with sand, packed into columns, and flushed with groundwater either once per day or once every other day. Extracted groundwater was evaluated for pH, methane, dissolved hydrogen, total organic carbon and volatile fatty acids (VFAs). Results show that for unrefined chitin and corn crop residue, anaerobic and nutrient-rich conditions (i.e. rich in VFAs) are created after 1 day and are sustained for more than 70 days.