Removal of antimony by dissimilatory and sulfate‐reducing pathways in anaerobic packed bed bioreactors

Abstract BACKGROUND Antimony is a toxic and potentially carcinogenic metalloid widely used in industry, whose untreated wastewater could lead to water body pollution. Antimony‐reduced species tend precipitate the form of minerals. The biological reduction antimonate antimonite occurs under anaerobic conditions by two extracellular pathways: dissimilatory reaction with dissolved H 2 S sulfate‐reducing systems. objective this study was determine removal from synthetic pathways packed bed reactors. RESULTS average antimony 28.4% 58.8% for processes, respectively. At end experiment, X‐ray diffraction analysis demonstrated presence valentinite reactor, struvite, valentinite, kermesite being crystal resulting stibnite oxidation exposure environmental conditions. Phylogenetic showed genera Geobacter Pseudomonas , associated reduction, high abundance bacteria reactor. In there dominance genus Dysgonomonas which play key role redox transformation metalloid. CONCLUSION has been obtained processes. Valentinite observed differences between both possible acting transformation. © 2022 Authors. Journal Chemical Technology Biotechnology published John Wiley & Sons Ltd on behalf Society Industry (SCI).