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Cerca | Lliura | Ajuda | Servei de Biblioteques | Sobre el DDD | Català English Español | |||||||||
| Pàgina inicial > Articles > Articles publicats > Dual C-Cl isotope fractionation offers potential to assess biodegradation of 1,2-dichloropropane and 1,2,3-trichloropropane by Dehalogenimonas cultures |
| Data: | 2024 |
| Resum: | 1,2-dichloropropane (1,2-DCP) and 1,2,3-trichloropropane (1,2,3-TCP) are hazardous chemicals frequently detected in groundwater near agricultural zones due to their historical use in chlorinated fumigant formulations. In this study, we show that the organohalide-respiring bacterium Dehalogenimonas alkenigignens strain BRE15 M can grow during the dihaloelimination of 1,2-DCP and 1,2,3-TCP to propene and allyl chloride, respectively. Our work also provides the first application of dual isotope approach to investigate the anaerobic reductive dechlorination of 1,2-DCP and 1,2,3-TCP. Stable carbon and chlorine isotope fractionation values for 1,2-DCP (ƐC = -13. 6 ± 1. 4 ‰ and ƐCl = -27. 4 ± 5. 2 ‰) and 1,2,3-TCP (ƐC = -3. 8 ± 0. 6 ‰ and ƐCl = -0. 8 ± 0. 5 ‰) were obtained resulting in distinct dual isotope slopes (Λ12DCP = 0. 5 ± 0. 1, Λ123TCP = 4 ± 2). However direct comparison of ΛC-Cl among different substrates is not possible and investigation of the C and Cl apparent kinetic isotope effects lead to the hypothesis that concerted dichloroelimination mechanism is more likely for both compounds. In fact, whole cell activity assays using cells suspensions of the Dehalogenimonas-containing culture grown with 1,2-DCP and methyl viologen as electron donor suggest that the same set of reductive dehalogenases was involved in the transformation of 1,2-DCP and 1,2,3-TCP. This study opens the door to the application of isotope techniques for evaluating biodegradation of 1,2-DCP and 1,2,3-TCP, which often co-occur in groundwaters near agricultural fields. |
| Ajuts: | Agencia Estatal de Investigación CTM2016-75587-C2-1-R Agencia Estatal de Investigación PID2019-103989RB-I00 Agencia Estatal de Investigación PID2022-138929OB-I00 Agencia Estatal de Investigación CGL2017-87216-C4-1-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-01008 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00308 |
| Nota: | Altres ajuts: acords transformatius de la UAB |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | Dehalogenimonas ; Dual-isotope fractionation ; 1,2-Dichloropropane ; 1,2,3-Trichloropropane ; Dihaloelimination ; Reductive dehalogenase |
| Publicat a: | Chemosphere, Vol. 358 (June 2024) , art. 142170, ISSN 1879-1298 |
11 p, 3.7 MB |