Influence of dissimilatory metal reduction on fate of organic and metal contaminants in the subsurface

Derek R. Lovley; Robert T. Anderson

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Influence of dissimilatory metal reduction on fate of organic and metal contaminants in the subsurface

机译：Influence of dissimilatory metal reduction on fate of organic and metal contaminants in the subsurface

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Dissimilatory Fe (III)-reducing microorganisms have the ability to destroy organic contaminants under anaerobic conditions by oxidizing them to carbon dioxide. Some Fe (III)-reducing microorganisms can also reductively dechlorinated chorinated contaminants. Fe (III)-reducing microorganisms can reduce a variety of contaminant metals and convert them from soluble forms to forms that are likely to be immobilized in the subsurface. Studies in petroleum-con-taminated aquifers have demonstrated that Fe (III)-reducing microorganisms can be effective agents in removing aromatic hydrocarbons from groundwater under anaerobic conditions. Laboratory studies have demonstrated the potential for Fe (III)-reducing microorganisms to remove uranium from contaminated groundwaters. The activity of Fe (III)-reducing microorganisms can be stimulated in several ways to enhance organic contaminant oxidation and metal reduction. Molecular analyses in both field and laboratory studies have demonstrated that microorganisms of the genus Geobacter become dominant members of the microbial community when Fe (III)-reducing conditions develop as the result of organic contamination, or when Fe (III)-reduction is artificially stimulated. These results suggest that further understanding of the ecophysiology of Geobacter species would aid in better prediction of the natural attenuation of organic contaminants under anaerobic conditions and in the design of strategies for the bioremediation of subsurface metal contamination.

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《Hydrogeology journal》 |2000年第1期|77-88|共12页
作者
Derek R. Lovley; Robert T. Anderson;
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Department of Microbiology, University of Massachusetts Amherst, Massachusetts 01003, USA;

Department of Civil and Environmental Engineering, University of Massachusetts Amherst, Massachusetts 01003, USA;

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正文语种英语
中图分类地质学;
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Influence of dissimilatory metal reduction on fate of organic and metal contaminants in the subsurface

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