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dc.contributor.authorLi, L
dc.contributor.authorZhang, B
dc.contributor.authorLi, L
dc.contributor.authorBorthwick, AGL
dc.date.accessioned2021-11-09T19:11:13Z
dc.date.issued2022-01
dc.identifier.issn0304-3894
dc.identifier.issn1873-3336
dc.identifier.other126932
dc.identifier.urihttp://hdl.handle.net/10026.1/18292
dc.description.abstract

Elevated selenium levels in the environment, with soluble selenate [Se(VI)] as the common chemical species, pose a severe threat to human health. Anaerobic Se(VI) bioreduction is a promising approach for selenium detoxification, and various organic/inorganic electron donors have proved effective in supporting this bioprocess. Nevertheless, autotrophic Se(VI) bioreduction driven by solid inorganic electron donors is still not fully understood. This work is the first to employ elemental sulfur [S(0)] as electron donor to support Se(VI) bioreduction. A batch trial with mixed culture demonstrated the feasibility of this bioprocess, with Se(VI) removal efficiency of 92.4 ± 0.7% at an initial Se(VI) concentration of 10 mg/L within 36 h. Continuous column tests showed that increased initial concentration, flow rate, and introduction of NO3--N depressed Se(VI) removal. Se(VI) was mainly bioreduced to solid elemental Se with trace selenite in the effluent, while S(0) was oxidized to SO42-. Enrichment of Thiobacillus, Desulfurivibrio, and Sulfuricurvum combined with upregulation of genes serA, tatC, and soxB indicated Se(VI) bioreduction was coupled to S(0) oxidation. Thiobacillus performed S(0) oxidation and Se(VI) reduction independently. Intermediate metabolites as volatile fatty acids, hydrogen and methane from S(0) oxidation were utilized by heterotrophic Se(VI) reducers for Se(VI) detoxification, indicative of microbial synergy.

dc.format.extent126932-126932
dc.format.mediumPrint-Electronic
dc.languageen
dc.language.isoen
dc.publisherElsevier BV
dc.subjectBiodetoxification
dc.subjectElemental sulfur
dc.subjectMicrobial reduction
dc.subjectSelenate
dc.subjectHumans
dc.subjectOxidation-Reduction
dc.subjectSelenic Acid
dc.subjectSelenious Acid
dc.subjectSelenium
dc.subjectSelenium Compounds
dc.subjectSulfur
dc.titleMicrobial selenate detoxification linked to elemental sulfur oxidation: Independent and synergic pathways
dc.typejournal-article
dc.typeJournal Article
dc.typeResearch Support, Non-U.S. Gov't
plymouth.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/34419844
plymouth.volume422
plymouth.publisher-urlhttp://dx.doi.org/10.1016/j.jhazmat.2021.126932
plymouth.publication-statusPublished
plymouth.journalJournal of Hazardous Materials
dc.identifier.doi10.1016/j.jhazmat.2021.126932
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Engineering, Computing and Mathematics
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.publisher.placeNetherlands
dcterms.dateAccepted2021-08-15
dc.rights.embargodate2022-8-16
dc.identifier.eissn1873-3336
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1016/j.jhazmat.2021.126932
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2022-01
rioxxterms.typeJournal Article/Review


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