PMID- 35283154 OWN - NLM STAT- MEDLINE DCOM- 20220506 LR - 20220506 IS - 1879-1298 (Electronic) IS - 0045-6535 (Linking) VI - 298 DP - 2022 Jul TI - Bioremediation of stainless steel pickling sludge through microbially induced carbonate precipitation. PG - 134213 LID - S0045-6535(22)00706-8 [pii] LID - 10.1016/j.chemosphere.2022.134213 [doi] AB - In this study, microbial induce carbonate precipitation (MICP) was introduced to immobilize chromium (Cr) in stainless steel pickling sludge (SSPS). Two methods were utilized to conduct the MICP process - Bacteria lysis liquor (BLL)-based MICP and bacteria-based MICP. BLL was obtained by breaking the cell walls with ultrasonic treatment. The urea hydrolyzation test illustrated that the BLL was better than bacteria solution. Both the treatments of bacteria lysis liquor-based MICP and bacteria-based MICP process can effectively entrap the Cr into mineral lattices, that reduce the potential environmental risk of SSPS. With 30 g/L urea and 7 days' treatment, BLL-based MICP presented better immobilization performance than bacteria-based MICP by lowering the bacteria concentration (OD(600)) from 0.8 to 0.7. The excellent biosorption of BLL contributed to Cr removal. Nevertheless, the addition of calcium (Ca) significantly enhanced the immobilization performance of bacteria-based MICP process rather than BLL-based MICP process. pH-dependent leaching tests illustrated the leaching of Cr followed an amphoteric pattern, while the leaching of Ni and Ca followed the cation pattern. Geochemical modeling revealed that the leaching of Cr from bio-mineralized products was solubility-controlled by Cr(OH)(3) and Cr(2)O(3). CI - Copyright (c) 2022 Elsevier Ltd. All rights reserved. FAU - Zhang, Junke AU - Zhang J AD - Department of Environmental Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, PR China; Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, PR China. Electronic address: zjkhuangjing@163.com. FAU - Su, Peidong AU - Su P AD - Department of Environmental Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, PR China; Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, PR China. Electronic address: supd2018@126.com. FAU - Li, Lin AU - Li L AD - Department of Civil and Architectural Engineering, Tennessee State University, Nashville, TN, 37209, USA. Electronic address: lli1@tnstate.edu. LA - eng PT - Journal Article DEP - 20220310 PL - England TA - Chemosphere JT - Chemosphere JID - 0320657 RN - 0 (Carbonates) RN - 0 (Sewage) RN - 0R0008Q3JB (Chromium) RN - 12597-68-1 (Stainless Steel) RN - 8W8T17847W (Urea) RN - H0G9379FGK (Calcium Carbonate) SB - IM MH - Bacteria MH - Biodegradation, Environmental MH - Calcium Carbonate MH - Carbonates MH - Chemical Precipitation MH - Chromium MH - *Sewage MH - *Stainless Steel MH - Urea OTO - NOTNLM OT - Bacteria toxicity OT - Bio-mineralization OT - Chromium leaching OT - Hazardous material OT - MICP EDAT- 2022/03/15 06:00 MHDA- 2022/05/07 06:00 CRDT- 2022/03/14 05:42 PHST- 2021/11/12 00:00 [received] PHST- 2022/03/01 00:00 [revised] PHST- 2022/03/03 00:00 [accepted] PHST- 2022/03/15 06:00 [pubmed] PHST- 2022/05/07 06:00 [medline] PHST- 2022/03/14 05:42 [entrez] AID - S0045-6535(22)00706-8 [pii] AID - 10.1016/j.chemosphere.2022.134213 [doi] PST - ppublish SO - Chemosphere. 2022 Jul;298:134213. doi: 10.1016/j.chemosphere.2022.134213. Epub 2022 Mar 10.