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DC Field | Value | Language |
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dc.contributor.author | Palau, Jordi | - |
dc.contributor.author | Trueba-Santiso, Alba | - |
dc.contributor.author | Yu, R. | - |
dc.contributor.author | Mortan, S | - |
dc.contributor.author | Shouakar-Stash, O | - |
dc.contributor.author | Freedman, D.L. | - |
dc.contributor.author | Wasmund, K. | - |
dc.contributor.author | Hunkeler, D. | - |
dc.contributor.author | Marco-Urrea, E. | - |
dc.contributor.author | Rosell Linares, Mònica | - |
dc.date.accessioned | 2023-03-16T07:53:29Z | - |
dc.date.available | 2023-03-16T07:53:29Z | - |
dc.date.issued | 2023-01-26 | - |
dc.identifier.issn | 0013-936X | - |
dc.identifier.uri | http://hdl.handle.net/2445/195361 | - |
dc.description.abstract | Brominated organic compounds such as 1,2-dibromoethane (1,2-DBA) are highly toxic groundwater contaminants. Multi-element compound-specific isotope analysis bears the potential to elucidate the biodegradation pathways of 1,2-DBA in the environment, which is crucial information to assess its fate in contaminated sites. This study investigates for the first time dual C−Br isotope fractionation during in vivo biodegradation of 1,2-DBA by two anaerobic enrichment cultures containing organohaliderespiring bacteria (i.e., either Dehalococcoides or Dehalogenimonas). Different εbulk C values (−1.8 ± 0.2 and −19.2 ± 3.5¿, respectively) were obtained, whereas their respective εbulk Br values were lower and similar to each other (−1.22 ± 0.08 and −1.2 ± 0.5¿), leading to distinctly different trends (ΛC−Br = Δδ13C/Δδ81Br ≈ εbulkC /εbulkBr ) in a dual C−Br isotope plot (1.4 ± 0.2 and 12 ± 4, respectively). These results suggest the occurrence of different underlying reaction mechanisms during enzymatic 1,2-DBA transformation, that is, concerted dihaloelimination and nucleophilic substitution (SN2-reaction). The strongly pathway-dependent ΛC−Br values illustrate the potential of this approach to elucidate the reaction mechanism of 1,2-DBA in the field and to select appropriate εbulkC values for quantification of biodegradation. The results of this study provide valuable information for future biodegradation studies of 1,2-DBA in contaminated sites. | - |
dc.format.extent | 10 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Chemical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1021/acs.est.2c07137 | - |
dc.relation.ispartof | Environmental Science & Technology, 2023, vol. 57, num. 5, p. 1949-1958 | - |
dc.relation.uri | https://doi.org/10.1021/acs.est.2c07137 | - |
dc.rights | (c) The Authors , 2023 | - |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.source | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) | - |
dc.subject.classification | Biodegradació | - |
dc.subject.classification | Isòtops de carboni | - |
dc.subject.classification | Isòtops | - |
dc.subject.other | Biodegradation | - |
dc.subject.other | Carbon isotopes | - |
dc.subject.other | Isotopes | - |
dc.title | Dual C-Br isotope fractionation indicates distinct reductive dehalogenation mechanisms of 1,2-dibromoethane in Dehalococcoides- and Dehalogenimonas-containing cultures | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 732488 | - |
dc.date.updated | 2023-03-16T07:53:29Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) |
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732488.pdf | 3.07 MB | Adobe PDF | View/Open |
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