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dc.contributor.authorSiggins, Alma
dc.contributor.authorThorn, Camilla
dc.contributor.authorHealy, Mark G.
dc.contributor.authorAbram, Florence
dc.identifier.citationSiggins, Alma, Thorn, Camilla, Healy, Mark G., & Abram, Florence. (2021). Simultaneous adsorption and biodegradation of trichloroethylene occurs in a biochar packed column treating contaminated landfill leachate. Journal of Hazardous Materials, 403, 123676. doi:
dc.description.abstractTrichloroethylene (TCE) is a human carcinogen that is commonly found in landfill leachate as a result of anthropogenic activities. Contaminated leachate plumes may be intercepted prior to reaching groundwater and treated in situ using permeable reactive barriers (PRB). This study used a packed column system containing herbal pomace and spruce biochar, previously shown to have TCE adsorptive capabilities, to investigate the feasibility of using pyrolysed waste as a fill material in a PRB. Influent containing raw or autoclaved landfill leachate was used to investigate the potential for environmental micro-organisms to establish a TCE-dechlorinating biofilm on the biochar, in order to prolong the operational life span of the system. TCE removal ≥ 99.7 was observed by both spruce and herbal pomace based biochars. No dichloroethylene (DCE) isomers were present in the column effluents, but cis-1,2 DCE was adsorbed to the biochar treating raw landfill leachate, indicating that dechlorination was occurring biologically in these columns. Known microbial species that are individually capable of complete dechlorination of TCE to ethene were not detected by 16S rRNA gene sequencing, but several species capable of partial TCE dechlorination (Desulfitobacterium spp., Sulfurospirillium spp. and Desulfuromonas spp) were present in the biofilms of the columns treating raw landfill leachate. These data demonstrate that biochar from waste material may be capable of supporting a dechlorinating biofilm to promote bioremediation of TCE.en_IE
dc.description.sponsorshipThis project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Actions grant agreement No 748106. The authors would like to acknowledge assistance with column installation from Edward Kilcullen, NUI Galway; biochar contributions from Caspar von Ziegner, NovoCarbo, Germany and Timo Ferdinand, HerbaCarbo, Germany; and supply of landfill leachate from Barry Cormican, East Galway Landfill.en_IE
dc.relation.ispartofJournal Of Hazardous Materialsen
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.subjectPermeable Reactive Barrieren_IE
dc.subjectWaste reuseen_IE
dc.titleSimultaneous adsorption and biodegradation of trichloroethylene occurs in a biochar packed column treating contaminated landfill leachateen_IE
dc.contributor.funderHorizon 2020en_IE
dc.local.contactMark Healy, Room Eng-1038, Civil Engineering, Col Of Engineering & Informatics, Nui Galway. 5364 Email:
dc.local.copyrightcheckedOpen access article
dcterms.projectinfo:eu-repo/grantAgreement/EC/H2020::MSCA-IF-EF-RI/748106/EU/Treatment of contaminated land using a biochar/media mixture/TOOLBOXen_IE

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Attribution-NonCommercial-NoDerivs 3.0 Ireland
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