PMID- 36327838 OWN - NLM STAT- MEDLINE DCOM- 20221129 LR - 20221201 IS - 1873-3336 (Electronic) IS - 0304-3894 (Linking) VI - 443 IP - Pt B DP - 2023 Feb 5 TI - Effect of phosphate on cadmium immobilized by microbial-induced carbonate precipitation: Mobilization or immobilization? PG - 130242 LID - S0304-3894(22)02036-2 [pii] LID - 10.1016/j.jhazmat.2022.130242 [doi] AB - Microbial-induced carbonate precipitation (MICP) is a promising technology to immobilize/remediate heavy metals (HMs) like cadmium (Cd). However, the long-term stability of MICP-immobilized HMs is unclear, especially in farmland where chemical fertilization is necessary. Therefore, we performed MICP treatment on soils contaminated with various Cd compounds (CdCO(3), CdS, and CdCl(2)) and added diammonium phosphate (DAP) to explore the impact of phosphate on the MICP-immobilized Cd. The results showed that MICP treatment was practical to immobilize the exchangeable Cd but to mobilize the carbonate and Fe/Mn oxide-bound Cd. After applying DAP, soil pH declined due to ammonium nitrification. At high P/Ca molar ratios (1/2 and 1), partial previously immobilized Cd was released due to the carbonate dissolution. Contrarily, exchangeable Cd transformed to less mobilizable Fe/Mn oxide-bound at low P/Ca molar ratios (1/4 and 1/8). Meanwhile, other treatments were also helpful in avoiding the release of immobilized Cd, such as applying non-ammonium phosphate and adding lime material after soil acidification. Our investigation suggested that the long-term stability of HMs in remediated sites should be carefully evaluated, especially in agricultural areas with phosphate and nitrogen fertilizer input. CI - Copyright (c) 2022 Elsevier B.V. All rights reserved. FAU - Liao, Zisheng AU - Liao Z AD - CAS Key Laboratory of Mineralogy and Metallogeny & Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, 510640 Guangzhou, China; CAS Center for Excellence in Deep Earth Science, 511 Kehua Street, 510640 Guangzhou, China; University of Chinese Academy of Science, 19 Yuquan Road, 100049 Beijing, China. FAU - Wu, Shijun AU - Wu S AD - CAS Key Laboratory of Mineralogy and Metallogeny & Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, 510640 Guangzhou, China; CAS Center for Excellence in Deep Earth Science, 511 Kehua Street, 510640 Guangzhou, China. Electronic address: wus@gig.ac.cn. FAU - Xie, Hong AU - Xie H AD - CAS Key Laboratory of Mineralogy and Metallogeny & Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, 510640 Guangzhou, China; CAS Center for Excellence in Deep Earth Science, 511 Kehua Street, 510640 Guangzhou, China; University of Chinese Academy of Science, 19 Yuquan Road, 100049 Beijing, China. FAU - Chen, Fanrong AU - Chen F AD - CAS Key Laboratory of Mineralogy and Metallogeny & Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, 510640 Guangzhou, China; CAS Center for Excellence in Deep Earth Science, 511 Kehua Street, 510640 Guangzhou, China. FAU - Yang, Yongqiang AU - Yang Y AD - CAS Key Laboratory of Mineralogy and Metallogeny & Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, 510640 Guangzhou, China; CAS Center for Excellence in Deep Earth Science, 511 Kehua Street, 510640 Guangzhou, China. FAU - Zhu, Runliang AU - Zhu R AD - CAS Key Laboratory of Mineralogy and Metallogeny & Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, 510640 Guangzhou, China; CAS Center for Excellence in Deep Earth Science, 511 Kehua Street, 510640 Guangzhou, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20221022 PL - Netherlands TA - J Hazard Mater JT - Journal of hazardous materials JID - 9422688 RN - 00BH33GNGH (Cadmium) RN - 0 (Soil Pollutants) RN - 0 (Soil) RN - 0 (Metals, Heavy) RN - 0 (ammonium phosphate) RN - 0 (Phosphates) RN - 0 (Carbonates) RN - 0 (Oxides) RN - H0G9379FGK (Calcium Carbonate) SB - IM MH - Cadmium/metabolism MH - *Soil Pollutants/metabolism MH - Soil/chemistry MH - *Metals, Heavy/analysis MH - Phosphates/chemistry MH - Carbonates MH - Oxides/chemistry MH - Calcium Carbonate OTO - NOTNLM OT - Cadmium OT - Immobilization OT - Microbial-induced carbonate precipitation (MICP) OT - Phosphate OT - Soil acidification COIS- Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Runliang Zhu reports financial support was provided by Fundamental and Applied Fundamental Research Major Program of Guangdong Province. Shijun Wu reports financial support was provided by National Natural Science Foundation of China. Shijun Wu reports financial support was provided by Guangdong Basic and Applied Basic Research Foundation. Shijun Wu reports financial support was provided by Science and Technology Planning Project of Guangdong Province. EDAT- 2022/11/04 06:00 MHDA- 2022/11/30 06:00 CRDT- 2022/11/03 19:30 PHST- 2022/08/18 00:00 [received] PHST- 2022/10/07 00:00 [revised] PHST- 2022/10/20 00:00 [accepted] PHST- 2022/11/04 06:00 [pubmed] PHST- 2022/11/30 06:00 [medline] PHST- 2022/11/03 19:30 [entrez] AID - S0304-3894(22)02036-2 [pii] AID - 10.1016/j.jhazmat.2022.130242 [doi] PST - ppublish SO - J Hazard Mater. 2023 Feb 5;443(Pt B):130242. doi: 10.1016/j.jhazmat.2022.130242. Epub 2022 Oct 22.