Effects of six different functional groups and their position on the bacterial metabolism of monosubstituted phenols under anaerobic conditions

Article Abstract:

The anaerobic condition and the nature of the substituent can have an effect on the metabolism and toxicity of phenolic compounds. An examination of the biodegradability of phenol and all isomers of aminophenol, chlorophenol, hydroxybenzoate (HB), dihydroxybenzene, methylphenol and nitrophenol under denitrifying and methanogenic conditions showed that all HB isomers incubated under both anaerobic conditions yielded stoichiometric quantities of N2 and CH4. Acclimation periods increased and rates of substrate depletion and initial production of N2 and CH4 decreased with the presence of any substituent on the phenolic nucleus.

Microbial metabolism, Phenols, Phenols (Class of compounds), Anaerobiosis

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Anaerobic degradation of benzene in diverse anoxic environments

Article Abstract:

A variety of aquatic sediments shows anaerobic microbial degradation of benzene under methanogenic, sulfate-reducing and iron-reducing conditions. This is contrary to the common observation that benzene is resistant to microbial degradation under anoxic conditions. Microbial degradation of benzene was observed in slurries constructed with sediments from different geographical locations and range from aquifer sands to fine-grained estuarine muds.

Microorganisms, Benzene

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Reductive dechlorination of polychlorinated biphenyls in anaerobic sediments

Article Abstract:

The condition that control polychorinated biphenyls in anaerobic sediments was studied. Two freshwater sediments from Hudson river and Silver Lake and one estuarine sediment from New Bedford Harbor were examined of their microbial activities and their resulting methanogenic and sulfidogenic reducing conditions. No sulfate-reducing condition activities were detected from any of the sediments.

Polychlorinated biphenyls, Sediments (Geology)

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