INFLUENCE OF NITRATE CONCENTRATION ON CARBON-TETRACHLORIDE TRANSFORMATION BY A DENITRIFYING MICROBIAL CONSORTIUM

[摘要] A denitrifying consortium capable of transforming carbon tetrachloride (CCl4) was cultured from an aquifer soil isolated sample from the DOE Hanford Site in southeastern Washington State. Experiments were performed to determine the effects of nitrate concentration on CCl4 transformation by these microbes. The microorganisms were cultured under two different experimental conditions, both of which gave similar cell growth. Under conditions where both the electron donor (acetate) and electron acceptor (nitrate) were present at all times, little CCl4 transformation was observed. However, transformation was observed if the nitrate concentration was reduced to a level where it was periodically depleted. These results are discussed in relation to the design of an in situ bioremediation system.

[发布日期] 1994-12-01

[关键词] CCL4 BIODEGRADATION;IN SITU BIOREMEDIATION;DENITRIFICATION;ELECTRON DONOR;ELECTRON ACCEPTOR