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Its high mobility and reactivity pose significant environmental risks. This study developed an <jats:styled-content style=\"fixed-case\"><jats:italic>Shewanella oneidensis<\/jats:italic><\/jats:styled-content> MR\u20101\u2010 Fe<jats:sub>2<\/jats:sub>O<jats:sub>3<\/jats:sub>\u2010biochar composite to enhance vanadium bioremediation. The composite exhibited strong vanadium resistance, achieving 92.5\u2009\u00b1\u20091.48% removal of pentavalent vanadium [V(V)] at 100\u2009mg\/l with an optimal biochar\/Fe\u2082O\u2083 ratio of 10:1. Its efficiency was further assessed under varying pH, organic carbon levels, and V(V) concentrations. XPS analysis confirmed the presence of tetravalent vanadium [V (IV)] and divalent iron [Fe (II)], while FTIR spectroscopy identified functional groups (\u2010OH, C=C, C=O) within the composite. These results suggest a synergistic removal mechanism involving complexation, dissimilatory iron reduction, and microbial V(V) reduction. This study provides a promising strategy for remediating V(V)\u2010contaminated groundwater.<\/jats:p><\/jats:sec><jats:sec><jats:title>Practitioner Points<\/jats:title><jats:p><jats:list list-type=\"bullet\">\n<jats:list-item><jats:p>A novel composite consisted of <jats:styled-content style=\"fixed-case\"><jats:italic>Shewanella oneidensis<\/jats:italic><\/jats:styled-content> MR\u20101, Fe<jats:sub>2<\/jats:sub>O<jats:sub>3,<\/jats:sub> and biochar was synthesized<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Complex promoted microbial life and increased resistance towards V(V)<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Complexation, Fe (II) oxidation, and bioreduction collectively contributed to V(V) removal<\/jats:p><\/jats:list-item>\n<\/jats:list><\/jats:p><\/jats:sec>","DOI":"10.1002\/wer.70063","type":"journal-article","created":{"date-parts":[[2025,3,30]],"date-time":"2025-03-30T21:13:52Z","timestamp":1743369232000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Remediation of vanadium(V)\u2010contaminated groundwater by the <scp><i>Shewanella oneidensis<\/i><\/scp> MR\u20101, Fe<sub>2<\/sub>O<sub>3<\/sub>, and biochar composite"],"prefix":"10.1002","volume":"97","author":[{"given":"Luyao","family":"Wang","sequence":"first","affiliation":[{"name":"MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, School of Water Resources and Environment China University of Geosciences Beijing  Beijing P. 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