PMID- 37442938 OWN - NLM STAT- MEDLINE DCOM- 20230811 LR - 20240327 IS - 1614-7499 (Electronic) IS - 0944-1344 (Linking) VI - 30 IP - 38 DP - 2023 Aug TI - Bioreduction and mineralization of Cr(VI) by Sporosarcina saromensis W5 induced carbonate precipitation. PG - 89355-89368 LID - 10.1007/s11356-023-28536-3 [doi] AB - The microbial reduction of Cr(VI) to Cr(III) is widely applied, but most studies ignored the stability of reduction products. In this study, the Cr(VI)-reducing bacterium of Sporosarcina saromensis combined with microbially induced carbonate precipitation (MICP) was used to explore the reduction and mineralization mechanisms of Cr(VI). The results indicated that the high concentration of Ca(2+) could significantly enhance the reduction and mineralization of Cr(VI). The highest reduction and mineralization efficiencies of 99.5% and 55.9% were achieved at 4 g/L Ca(2+). Moreover, the urease activity of S. saromensis in the experimental group was up to 13.28 U/mg NH(3)-N. Besides, the characteristic results revealed that Cr(VI) and reduced Cr(III) were absorbed on the surface or got into the interspace of CaCO(3), which produced a new stable phase (Ca(10)Cr(6)O(24)(CO(3))). Overall, the combination of S. saromensis and MICP technology might be a high-efficiency and environmentally friendly strategy for further application in the Cr(VI)-containing groundwater. CI - (c) 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature. FAU - Jiang, Chunyangzi AU - Jiang C AD - School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China. FAU - Hu, Liang AU - Hu L AD - School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China. huliang2018@csu.edu.cn. FAU - He, Ni AU - He N AD - School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China. FAU - Liu, Yayuan AU - Liu Y AD - School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China. FAU - Zhao, Hongbo AU - Zhao H AD - School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China. LA - eng GR - 52270172/National Natural Science Foundation of China/ GR - 51909281/National Natural Science Foundation of China/ GR - 2022YFE0119600/Key Research and Development International Cooperation Project/ PT - Journal Article DEP - 20230714 PL - Germany TA - Environ Sci Pollut Res Int JT - Environmental science and pollution research international JID - 9441769 RN - 18540-29-9 (chromium hexavalent ion) RN - 0R0008Q3JB (Chromium) RN - 0 (Carbonates) RN - H0G9379FGK (Calcium Carbonate) RN - Sporosarcina saromensis SB - IM MH - *Chromium MH - Carbonates MH - *Sporosarcina MH - Calcium Carbonate OTO - NOTNLM OT - Hexavalent chromium OT - Microbial remediation OT - Sporosarcina saromensis W5 OT - Urease EDAT- 2023/07/14 13:06 MHDA- 2023/08/11 06:42 CRDT- 2023/07/13 23:18 PHST- 2023/03/14 00:00 [received] PHST- 2023/06/28 00:00 [accepted] PHST- 2023/08/11 06:42 [medline] PHST- 2023/07/14 13:06 [pubmed] PHST- 2023/07/13 23:18 [entrez] AID - 10.1007/s11356-023-28536-3 [pii] AID - 10.1007/s11356-023-28536-3 [doi] PST - ppublish SO - Environ Sci Pollut Res Int. 2023 Aug;30(38):89355-89368. doi: 10.1007/s11356-023-28536-3. Epub 2023 Jul 14.