Unveiling complete natural reductive dechlorination mechanisms of chlorinated ethenes in groundwater: insights from functional gene analysis

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dc.contributor.authorZhang, Zhuanxia
dc.contributor.authorAli, Mukhtiar
dc.contributor.authorTang, Zhiwen
dc.contributor.authorSun, Qi
dc.contributor.authorWang, Qing
dc.contributor.authorLiu, Xin
dc.contributor.authorYin, Lipu
dc.contributor.authorYan, Song
dc.contributor.authorXu, Minmin
dc.contributor.authorCoulon, Frederic
dc.contributor.authorSong, Xin
dc.date.accessioned2024-04-18T09:30:46Z
dc.date.available2024-04-18T09:30:46Z
dc.date.issued2024-03-22
dc.description.abstractMonitored natural attenuation (MNA) of chlorinated ethenes (CEs) has proven to be a cost-effective and environment-friendly approach for groundwater remediation. In this study, the complete dechlorination of CEs with formation of ethene under natural conditions, were observed at two CE-contaminated sites, including a pesticide manufacturing facility (PMF) and a fluorochemical plant (FCP), particularly in the deeply weathered bedrock aquifer at the FCP site. Additionally, a higher abundance of CE-degrading bacteria was identified with heightened dechlorination activities at the PMF site, compared to the FCP site. The reductive dehalogenase genes and Dhc 16 S rRNA gene were prevalent at both sites, even in groundwater where no CE dechlorination was observed. vcrA and bvcA was responsible for the complete dechlorination at the PMF and FCP site, respectively, indicating the distinct contributions of functional microbial species at each site. The correlation analyses suggested that Sediminibacterium has the potential to achieve the complete dechlorination at the FCP site. Moreover, the profiles of CE-degrading bacteria suggested that dechlorination occurred under Fe3+/sulfate-reducing and nitrate-reducing conditions at the PMF and FCP site, respectively. Overall these findings provided multi-lines of evidence on the diverse mechanisms of CE-dechlorination under natural conditions, which can provide valuable guidance for MNA strategies implementation.en_UK
dc.description.sponsorshipWe acknowledge the cooperation between China and the EU through the EiCLaR project (European Union’s Horizon 2020, N°965945).en_UK
dc.identifier.citationZhang Z, Ali M, Tang Z, et al., (2024) Unveiling complete natural reductive dechlorination mechanisms of chlorinated ethenes in groundwater: insights from functional gene analysis. Journal of Hazardous Materials, Volume 469, May 2024, Article number 134034en_UK
dc.identifier.issn0304-3894
dc.identifier.urihttps://doi.org/10.1016/j.jhazmat.2024.134034
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/21210
dc.language.isoen_UKen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectChlorinated ethenesen_UK
dc.subjectNatural reductive dechlorinationen_UK
dc.subjectRDase genesen_UK
dc.subjectGroundwateren_UK
dc.titleUnveiling complete natural reductive dechlorination mechanisms of chlorinated ethenes in groundwater: insights from functional gene analysisen_UK
dc.typeArticleen_UK
dcterms.dateAccepted2024-03-12

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