2018/04/10 by Jiaokun Li, Yu Huang, Huang Yu +6
Chemistry · Environmental Science · #16S ribosomal RNA #Antimony #Arsenic contamination and mitigation #Bacteria #Biology #Bioremediation #Chemistry #Contamination #Ecology #Environmental chemistry #Environmental remediation #Food science #Heavy Metal Exposure and Toxicity #Heavy metals in environment #Inorganic chemistry #Microbiology #Microorganism #Organic chemistry #Oxidizing agent #Soil water
paper · doi:10.1080/01490451.2018.1454556
crossref issued 2018/04/10 · crossref published 2018/04/10 · crossref published-online 2018/04/10 · openalex publication_date 2018/04/10 · crossref created 2018/04/10 · crossref published-print 2018/09/14 · crossref deposited 2020/08/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02 · crossref indexed 2026/08/02
Antimony (Sb)-oxidizing bacteria play an important role in environmental Sb bioremediation because of their ability to convert the more toxic Sb(III) to the less toxic Sb(V). So far, the information about the Sb(III)-oxidizing bacteria species is still limited. In this study, three highly Sb(III)-resistant bacterial strains were isolated from contaminated mine soils after aerobic enrichment culturing with Sb(III) (1 mM). The morphological, biochemical, and 16S rRNA gene sequencing analysis suggested that the three novel bacterial isolates fell within Cupriavidus, Moraxella, and Bacillus, respectively. Among the strains, Moraxella sp. S2 isolated from soils with the highest Sb content exhibited the highest minimum inhibitory concentration for Sb(III) but the lowest Sb(III) oxidation efficiency, which could not completely oxidize 50 μM Sb(III) in 15 days. Cupriavidus sp. S1 was able to oxidize 50 μM Sb(III) completely in 12 days, but could not oxidize 100 μM Sb(III) even with extended time of incubation, while Bacillus sp. S3 with the lowest resistance to Sb(III) could aerobically oxidize 100 µM Sb(III) within 2 days, showing high Sb(III) oxidation efficiency. Our research demonstrated that indigenous microorganisms associated with Sb mine soils were capable of Sb oxidation, and the novel bacteria isolated could represent good candidates for Sb remediation in heavily polluted sites.