Zhuang Dingxiang, Yao Weiheng, Guo Yan, Chen Zhengzheng, Gui Herong, Zhao Yanyang
National Engineering Research Center of Coal Mine Water Hazard Controlling, School of Resources and Civil Engineering, Suzhou University, Suzhou 234000, China.
Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
Microorganisms. 2025 Jan 2;13(1):64. doi: 10.3390/microorganisms13010064.
Recently, the ability of microbial-induced calcium carbonate precipitation (MICP) to remediate heavy metals has been widely explored. was selected to remediate heavy metal-contaminated solution and aged refuse, exploring the feasibility of bioremediation of heavy metals and analyzing the changes in heavy metal forms before and after bioremediation, as well as the mechanism of remediation. The results showed that achieved remediation rates of 95%, 84%, 97%, and 98% for Cd, Pb, Zn, and Cr (III) in contaminated solution, respectively. It also achieved remediation rates of 74%, 84%, and 62% for exchangeable Cd, Pb, and Zn in aged refuse, respectively. The content of exchangeable Cr (III) before bioremediation was almost zero. The content of heavy metals with exchangeable form and carbonate-bounded form in aged refuse decreased after bioremediation, while the content of heavy metals with iron-manganese oxide binding form and residual form increased. Simultaneously, the presence of Fe and Al components in aged refuse, as well as the precipitation of calcium carbonate produced during the MICP process, jointly promotes the transformation of heavy metals into more stable forms.
近年来，微生物诱导碳酸钙沉淀（MICP）修复重金属的能力已得到广泛探索。选用其修复重金属污染溶液和陈腐垃圾，探讨重金属生物修复的可行性，分析生物修复前后重金属形态的变化以及修复机制。结果表明，其对污染溶液中Cd、Pb、Zn和Cr（III）的修复率分别达到95%、84%、97%和98%。它对陈腐垃圾中可交换态Cd、Pb和Zn的修复率分别达到74%、84%和62%。生物修复前可交换态Cr（III）的含量几乎为零。生物修复后，陈腐垃圾中可交换态和碳酸盐结合态重金属的含量降低，而铁锰氧化物结合态和残渣态重金属的含量增加。同时，陈腐垃圾中Fe和Al成分的存在以及MICP过程中产生的碳酸钙沉淀，共同促进了重金属向更稳定形态的转化。
