Impact of iron- and/or sulfate-reduction on a cis-1,2-dichloroethene and vinyl chloride respiring bacterial consortium: experiments and model-based interpretation
| Autor: | Massimo Rolle, Alexandra Marie Murray, Mette Martina Broholm, Christof Holliger, Julien Maillard |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
desulfovibrio-vulgaris hildenborough
genome sequence Iron Vinyl Chloride Electron donor 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences kinetic-model Vinyl chloride dechlorination 03 medical and health sciences chemistry.chemical_compound Bioremediation Environmental Chemistry Sulfate 030304 developmental biology 0105 earth and related environmental sciences Dehalococcoides 0303 health sciences Bacteria biology Sulfates ferric iron Public Health Environmental and Occupational Health trichloroethylene tce General Medicine Biodegradation fe(iii) biology.organism_classification culture Dichloroethylenes Biodegradation Environmental chemistry Microbial population biology hydrogen Environmental chemistry competition |
| Zdroj: | Murray, A M, Maillard, J, Rolle, M, Broholm, M M & Holliger, C 2020, ' Impact of iron-and/or sulfate-reduction on a cis-1,2-dichloroethene and vinyl chloride respiring bacterial consortium: experiments and model-based interpretation ', Journal of Environmental Monitoring, vol. 22, pp. 740-750 . https://doi.org/10.1039/c9em00544g |
| ISSN: | 2050-7895 2050-7887 |
| DOI: | 10.1039/c9em00544g |
| Popis: | Process understanding of microbial communities containing organohalide-respiring bacteria (OHRB) is important for effective bioremediation of chlorinated ethenes. The impact of iron and sulfate reduction on cis-1,2-dichloroethene (cDCE) and vinyl chloride (VC) dechlorination by a consortium containing the OHRB Dehalococcoides spp. was investigated using multiphase batch experiments. The OHRB consortium was found to contain endogenous iron- and sulfate-reducing bacteria (FeRB and SRB). A biogeochemical model was developed and used to quantify the mass transfer, aquatic geochemical, and microbial processes that occurred in the multiphase batch system. It was determined that the added SRB had the most significant impact on contaminant degradation. Addition of the SRB increased maximum specific substrate utilization rates, k(max), of cDCE and VC by 129% and 294%, respectively. The added FeRB had a slight stimulating effect on VC dechlorination when exogenous SRB were absent, but when cultured with the added SRB, FeRB moderated the SRB's stimulating effect. This study demonstrates that subsurface microbial community interactions are more complex than categorical, guild-based competition for resources such as electron donor. |
| Databáze: | OpenAIRE |
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