| Biostimulation of the autochthonous microbial community for the depletion of polychlorinated biphenyls (PCBs) in contaminated sediments. | |
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MedLine Citation:
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PMID: 23208754 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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In this study, the effect of the biostimulation of the autochthonous microbial community on the depletion of polychlorinated biphenyls (PCBs) in historically contaminated sediments (6.260 ± 9.3 10(-3) μg PCB/ g dry weight) has been observed. Biostimulation consisted of (1) the amendment of an electron donor to favor the dehalogenation of the high-chlorinated PCBs and (2) the vegetation of sediments with Sparganium sp. plants to promote the oxidation of the low-chlorinated PCBs by rhizodegradation. The effects of the treatments have been analyzed in terms of both PCB depletion and changes of the autochthonous bacterial community structure. The relative abundance of selected bacterial groups with reference to untreated sediments has been evaluated by quantitative real-time PCR. The amendment of acetate determined the enrichment of anaerobic dechlorinators like Dehalococcoides sp. Vegetation with Sparganium sp. plants determined the enrichment of either (3) the dechlorinators, Dehalococcoides and the Chloroflexi o-17/DF-1 strains or (4) the Acidobacteria, β-Proteobacteria, Actinobacteria, α-Proteobacteria, Bacteroidetes, and Firmicutes. The combination of the two biostimulation strategy determined the 91.5 % of abatement of the initial PCB content. |
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Authors:
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Simona Di Gregorio; Hassan Azaizeh; Roberto Lorenzi |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-12-4 |
Journal Detail:
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Title: Environmental science and pollution research international Volume: - ISSN: 1614-7499 ISO Abbreviation: Environ Sci Pollut Res Int Publication Date: 2012 Dec |
Date Detail:
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Created Date: 2012-12-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9441769 Medline TA: Environ Sci Pollut Res Int Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Biology, University of Pisa, Via Luca Ghini 5-56123, Pisa, Italy, sdigregorio@biologia.unipi.it. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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