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Microbial dehalogenation of organohalides in marine and estuarine environments

Paper ID Volume ID Publish Year Pages File Format Full-Text
15594 42454 2015 9 PDF Available
Title
Microbial dehalogenation of organohalides in marine and estuarine environments
Abstract

•PCBs, PCDDs, PBDEs, DDT can be dehalogenated in marine and estuarine environments.•In situ-mimicking conditions provide better estimate of environmental pollutant fate.•Biostimulation and bioaugmentation approaches require site-specific assessment.•Few marine and estuarine dehalorespiring bacteria have been isolated so far.•Marine sediments harbor a large diversity of rdhA genes.

Marine sediments are the ultimate sink and a major entry way into the food chain for many highly halogenated and strongly hydrophobic organic pollutants, such as polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), polybrominated diphenylethers (PBDEs) and 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT). Microbial reductive dehalogenation in anaerobic sediments can transform these contaminants into less toxic and more easily biodegradable products. Although little is still known about the diversity of respiratory dehalogenating bacteria and their catabolic genes in marine habitats, the occurrence of dehalogenation under actual site conditions has been reported. This suggests that the activity of dehalogenating microbes may contribute, if properly stimulated, to the in situ bioremediation of marine and estuarine contaminated sediments.

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Microbial dehalogenation of organohalides in marine and estuarine environments
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Publisher
Database: Elsevier - ScienceDirect
Journal: Current Opinion in Biotechnology - Volume 33, June 2015, Pages 287–295
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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