Transformations of 1,1,2,2-tetrachloroethane under methanogenic conditions

Article Abstract:

Biotic and abiotic transformations of 1,1,2,2-tetrachloroethane (TeCA) under methanogenic conditions were investigated. It was shown that the degradation of TeCA began without lag with municipal digester sludge. Biotic transformation produced 1,1,2-trichloroethane, trans-1,2-dichloroethene and cis-1,2-dichloroethene while Abiotic degradation produced trichloroethene. Under methanogenic conditions, dichloroelimination and dehydrochlorination were both instrumental in the removal of TeCA and 1,1,2-TCA.

Environmental aspects, Water, Underground, Groundwater, Solvents

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Effect of hydrogen on reductive dechlorination of chlorinated ethenes

Article Abstract:

Hydrogen (H2) is an important electron donor in the reductive dechlorination of chloroethenes. In a study conducted in a methanogenic fluidized bed reactor operating over 14 months, it was found that tetrachloroethene was dechlorinated at a faster rate when H2 levels increased. Additionally, dechloronating bacteria had high levels of H2 utilization than methanogens

Research and Development in the Physical, Engineering, and Life Sciences, Industrial Gas Manufacturing, Industrial gases, Hydrogen, Water Pollution Control R&D, Oxidation-reduction reaction, Oxidation-reduction reactions, Water pollution research, Vinyl chloride

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Chlorophenol toxicity removal and monitoring in aerobic treatment: recovery from process upsets

Article Abstract:

A study has tested the use of an aerobic fluidized-bed reactor for bioremediation of ground water containing chlorophenols. The experiment achieved over 99% removal of stable chlorophenol. Investigation established mineralization of chlorophenols had occurred. The Microtox acute toxicity assay monitored chlorophenol degradation.

Health aspects, Bioremediation, Chlorophenols

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