Rapid dechlorination of carbon tetrachloride and chloroform by extracellular agents in cultures of methanosarcina thermophila

Article Abstract:

The presence of an excreted biomolecule from Methanosarcina thermophila are extracellular agents in carbon tetrachloride (CT) and chloroform (CF) transformation, which is further enhanced by the elemental iron. Batch experiments show that supernatants grown in iron rich mediums are found to facilitate rapid CT and CF transformation whereas supernatants grown in mediums with no iron were only able to catalyze CT transformations. CF and CT transformation rates are also found to be unaffected by filtering and autoclaving.

Comment:

Presence of Methanosarcina thermophila plus elemental iron hastens carbon tetrachloride and chloroform transformation

United States, Science & research, Article

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Rapid dechlorination of carbon tetrachloride and chloroform by extracellular agents in cultures of Methanosarcina thermophila

Article Abstract:

The efficacy of Methanosarcina thermophila extracellular agents in carbon tetrachloride (CT) and chloroform (CF) is found to be enhanced by the iron. Supernatants grown in iron rich mediums are found to facilitate rapid CT and CF transformation whereas supernatants grown in mediums with no iron were only able to catalyze CT transformations. CF and CT transformation rates are also found to be unaffected by filtering and autoclaving.

Biodegradation, Bacteria, Thermophilic, Thermophiles

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Carbon atom-initiated degradation of carbon tetrachloride in the presence of molecular oxygen: a product and mechanistic study

Article Abstract:

Carbon tetrachloride has been found to be chemically degraded by gas-phase reaction in the presence of molecular oxygen. FT-IR and GC/MS experiments show that the initial step involves carbon-chlorine bond breaking due atomic carbon-carbon tetrachloride reaction forming a carbon-chlorine intermediate species. Phosgene and carbon dioxide are finally generated as final products via the addition of oxygen.

Analysis, Decomposition (Chemistry)

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