DOI: 10.1016/j.watres.2018.12.061
Scopus记录号: 2-s2.0-85060079619
论文题名: Tetrachloroethene primes reductive dechlorination of polychlorinated biphenyls in a river sediment microcosm
作者: Xu G. ; Lu Q. ; Yu L. ; Wang S.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 87
结束页码: 95
语种: 英语
英文关键词: Dehalococcoides
; Microbial reductive dechlorination
; PCBs
; Sediment
; Tetrachloroethene
Scopus关键词: Bioremediation
; Dechlorination
; Ethylene
; Organic pollutants
; Rivers
; Sediments
; Dehalococcoides
; Effective approaches
; Efficient strategy
; In-situ bioremediation
; Microbial reductive dechlorination
; Polychlorinated biphenyl (PCBs)
; Reductive dechlorination
; Tetrachloroethene
; Polychlorinated biphenyls
; aroclor 1260
; chlorine
; polychlorinated biphenyl
; tetrachloroethylene
; bacterium
; bioremediation
; biostimulation
; concentration (composition)
; dechlorination
; fluvial deposit
; halide
; laboratory method
; microbial activity
; microcosm
; PCB
; pollutant removal
; reduction
; relative abundance
; tetrachloroethylene
; Article
; bacterium isolation
; bioremediation
; controlled study
; dechlorination
; Dehalococcoides
; Dehalococcoides mccartyi
; in vitro study
; in vivo study
; microcosm
; nonhuman
; priority journal
; Dehalococcoides
英文摘要: Halo-priming is an effective approach to initiate microbial reductive dechlorination of polychlorinated biphenyls (PCBs) at contaminated sites, of which the application has been restricted by introducing extra pollutants generated from priming organohalides. In this study, tetrachloroethene (PCE) was demonstrated to be an effective priming compound to enhance PCB dechlorination both in a PCB-dechlorinating pure culture and a river sediment microcosm. In the isolated PCB-dechlorinating Dehalococcoides mccartyi CG1, PCB dechlorination activities were stimulated by adding 0.05–0.2 mM PCE, and were inhibited when further increasing PCE concentrations. Both in vivo and in vitro experiments showed that PCBs and PCE were synchronously dechlorinated in D. mccartyi CG1. In a river sediment microcosm, which was established to mimic in situ biostimulation of PCB dechlorination, 0.2 mM PCE could significantly improve para-chlorine removal from both PCB180 (2345-245-CB) and Aroclor 1260, and increase the relative abundance of indigenous dechlorinating Dehalococcoides for more than 20 times (from <0.1% to 2.3–5.0%). At the same time, PCE as a priming compound was completely dechlorinated to non-toxic ethene. Overall, this study provided an efficient strategy to stimulate in situ bioremediation of PCBs. © 2019 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122020
Appears in Collections: 气候变化事实与影响
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作者单位: School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, 510006, China; Environmental Microbiome Research Center, Sun Yat-Sen University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510006, China
Recommended Citation:
Xu G.,Lu Q.,Yu L.,et al. Tetrachloroethene primes reductive dechlorination of polychlorinated biphenyls in a river sediment microcosm[J]. Water Research,2019-01-01