The role of natural Fe(II)-bearing minerals in chemoautotrophic chromium (VI) bio-reduction in groundwater
dc.contributor.author | Lu, J | |
dc.contributor.author | Zhang, Baogang | |
dc.contributor.author | He, C | |
dc.contributor.author | Borthwick, Alistair | |
dc.date.accessioned | 2021-08-22T11:49:43Z | |
dc.date.issued | 2020-05 | |
dc.identifier.issn | 0304-3894 | |
dc.identifier.issn | 1873-3336 | |
dc.identifier.other | 121911 | |
dc.identifier.uri | http://hdl.handle.net/10026.1/17662 | |
dc.description.abstract |
To date, comparatively little is known about the role of natural Fe(II)-bearing minerals in bioremediation of chromium (VI) contaminated aquifers subject to chemoautotrophic conditions. This work employed four kinds of Fe(II)-bearing minerals (pyrite, mackinawite, wustite, and magnetite) as inorganic electron donors to support Cr(VI) bio-reduction. In batch experiments, mackinawite (FeS) performed best, with Cr(VI) removal efficiency of 98.1 ± 1.21 % in 96 h. Continuous column experiments lasting 180 d implied that groundwater chemistry and hydrodynamics influenced the Cr(VI) removal process. A breakthrough study suggested that biotic and abiotic contributions to Cr(VI) reduction were 76.0 ± 1.12 % and 24.1 ± 1.43 %, respectively. Cr(VI) was reduced to insoluble Cr(III), whereas Fe(II) and S(-II) in mackinawite were finally oxidized to Fe(III) and sulfate. Mackinawite evolved progressively into pyrrhotite. High-throughput 16S rRNA gene sequencing indicated that mackinawite-driven Cr(VI) reduction was mediated through synergistic interactions of microbial consortia; i.e. autotrophs as Acidovorax synthesized volatile fatty acids as metabolic intermediates, which were consumed by Cr(VI) reducers as Geobacter. Genes encoding enzymes for S oxidation (soxB) and Cr(VI) reduction (chrA, yieF) were upregulated. Cytochrome c participating in Fe(II) oxidation increased significantly. This work advances the development of sustainable techniques for Cr(VI) polluted groundwater remediation. | |
dc.format.extent | 121911-121911 | |
dc.format.medium | Print-Electronic | |
dc.language | en | |
dc.language.iso | eng | |
dc.publisher | Elsevier BV | |
dc.subject | Bio-reduction | |
dc.subject | Chromium (VI) | |
dc.subject | Fe(II)-bearing minerals | |
dc.subject | Mackinawite | |
dc.subject | Bacteria | |
dc.subject | Biodegradation, Environmental | |
dc.subject | Chromium | |
dc.subject | Ferrous Compounds | |
dc.subject | Groundwater | |
dc.subject | Minerals | |
dc.subject | Models, Chemical | |
dc.subject | Oxidation-Reduction | |
dc.subject | Water Pollutants, Chemical | |
dc.title | The role of natural Fe(II)-bearing minerals in chemoautotrophic chromium (VI) bio-reduction in groundwater | |
dc.type | journal-article | |
dc.type | Journal Article | |
dc.type | Research Support, Non-U.S. Gov't | |
plymouth.author-url | https://www.ncbi.nlm.nih.gov/pubmed/31879105 | |
plymouth.volume | 389 | |
plymouth.publication-status | Published | |
plymouth.journal | Journal of Hazardous Materials | |
dc.identifier.doi | 10.1016/j.jhazmat.2019.121911 | |
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.place | Netherlands | |
dcterms.dateAccepted | 2019-12-15 | |
dc.rights.embargodate | 9999-12-31 | |
dc.identifier.eissn | 1873-3336 | |
dc.rights.embargoperiod | Not known | |
rioxxterms.versionofrecord | 10.1016/j.jhazmat.2019.121911 | |
rioxxterms.licenseref.uri | http://www.rioxx.net/licenses/all-rights-reserved | |
rioxxterms.licenseref.startdate | 2020-05-05 | |
rioxxterms.type | Journal Article/Review |