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Remediation of PCE-contaminated groundwater from an industrial site in southern Italy: A laboratory-scale study

Paper ID Volume ID Publish Year Pages File Format Full-Text
35714 45103 2007 8 PDF Available
Title
Remediation of PCE-contaminated groundwater from an industrial site in southern Italy: A laboratory-scale study
Abstract

Batch reactors and microcosms were used to evaluate groundwater bioremediation potential of tetrachloroethene (PCE) in the presence of additional pollutants present at a site located in the Apulia Region (SE Italy). Reductive dechlorination of PCE was studied under anaerobic conditions by comparing the effectiveness of three inocula: (a) soil sampled at the contaminated site, (b) anaerobic sludge from a municipal wastewater plant, and (c) an enriched dehalogenating culture containing Dehalococcoides species. In order to enhance dehalogenation, reactors inoculated with sludge were also amended with selected electron donors. Aerobic reactors were also established to study oxidative degradation of vinyl chloride (VC), that may accumulate after incomplete dechlorination of PCE.Results showed that consortia derived from anaerobic sludge and amended with electron donors quantitatively and incompletely degraded PCE to cis-dichloroethylene, whereas in reactors augmented with a dehalogenating culture complete dechlorination of PCE occurred even in the presence of additional toxic contaminants. The presence of Dehalococcoides spp. in the dehalogenating culture and its absence in reactors inoculated with anaerobic sludge was confirmed using FISH community analyses. In all cases, prolonged incubation periods were necessary for dechlorination. On the other hand, oxidative degradation of VC in aerobic reactors occurred after short lag times.

Keywords
Bioremediation; Bioaugmentation; Tetrachloroethylene (PCE); Dechlorination; Microcosms; Fluorescence in situ hybridization (FISH)
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Remediation of PCE-contaminated groundwater from an industrial site in southern Italy: A laboratory-scale study
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 11, November 2007, Pages 1498–1505
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us