Reductive Dechlorination of 2,3,4-Chlorobiphenyl by Biostimulation and Bioaugmentation

doi:10.1089/ees.2011.0228

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Resources Management > Periodical Articles > Item 310902800/27666

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/27666

Title:	Reductive Dechlorination of 2,3,4-Chlorobiphenyl by Biostimulation and Bioaugmentation
Authors:	Sudjarid, Wichidtra Chen, I-Ming Monkong, Wachiraporn Anotai, Jin
Contributors:	環境資源管理系
Keywords:	Pcbs Sediment Slurry Bioremediation
Date:	2012-04
Issue Date:	2014-03-21 16:16:59 (UTC+8)
Publisher:	Mary Ann Liebert Inc
Abstract:	Dechlorination ability of indigenous microorganisms from seven stream sediments collected around Bangkok and its vicinity in Thailand was tested by amended with seven polychlorinated biphenyl congeners (PCBs) including 2,3,4-chlorobiphenyl (234-CBp), 22'5-CBp, 24'5-CBp, 22'35'-CBp, 22'45-CBp, 23'44'5-CBp, and 22'34'5'6-CBp. After 2-22 weeks of incubation, 234-CBp dechlorination could be initiated and dechlorinated to 24-CBp in all seven sediment slurry without any further enrichment, with dechlorination completed within 28 weeks. This is the first evidence indicating that 234-CBp dechlorination consortium actually existed in the natural streams of Thailand and could perform the 234-CBp dechlorination in the fresh sediment slurry without any nutrient amendment. The lag phase of 234-CBp was shortest in the sediment slurry collected and prepared from the Hua Lum Poo Canal (HLP), which was sporadically contaminated with hexachlorobenzene. In biostimulation experiments, HLP nutrient-strengthened sediment slurry was amended by yeast extract, mineral nutrients, acetate, lactate, and pyruvate, but no significant enhancement was found for 234-CBp dechlorination. It implied that the present substrates and nutrients at this site were sufficient to sustain the activity of 234-CBp dechlorination consortium. In bioaugmentation experiments, sediment slurry from HLP that possessed higher dechlorination potential was introduced to another five less effective sediment slurries for 234-CBp dechlorination tests. Results indicated a significant acceleration to those important slurries, and revealed a promising application for the in-situ remediation of PCB contamination in Thailand that might be expanded to worldwide application.
Relation:	Environmental Engineering Science, 29(4), 255-261
Appears in Collections:	[Dept. of Environmental Resources Management] Periodical Articles

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