Qin Jia, Cao Huan, Xu Yang, He Fei, Zhang Fengji, Wang Wenqiang
College of optoelectronic manufacturing, Zhejiang Industry and Trade Vocational College Wenzhou 325002 China
School of Materials Science and Engineering, Lanzhou University of Technology Lanzhou Gansu 730050 China.
RSC Adv. 2025 Jan 29;15(4):2840-2849. doi: 10.1039/d4ra05829a. eCollection 2025 Jan 23.
Microbially induced calcium carbonate precipitation (MICP) has emerged as a promising technique for environmental remediation, particularly for heavy metal removal. This study explores the potential of MICP for Cr(iii) removal, analyzing the effects of temperature, pH, calcium source addition, and initial Cr(iii) concentration on removal efficiency. The results show that Cr(iii) can be efficiently removed with a removal rate approaching 100% under optimal conditions (25 °C, pH 7.0, 1.0 g CaCl). The presence of Cr(iii) induces the transformation of CaCO crystals from calcite to spherulitic aragonite, forming Cr-bearing carbonate compounds and hydroxides. This study provides insights into the mechanisms and optimal conditions for MICP-mediated Cr(iii) removal, highlighting its feasibility and effectiveness for large-scale environmental remediation and offering an economical and environmentally friendly solution to Cr contamination.
微生物诱导碳酸钙沉淀（MICP）已成为一种很有前景的环境修复技术，特别是在去除重金属方面。本研究探讨了MICP去除Cr(III)的潜力，分析了温度、pH值、钙源添加量和初始Cr(III)浓度对去除效率的影响。结果表明，在最佳条件（25°C，pH 7.0，1.0 g CaCl）下，Cr(III)可以被高效去除，去除率接近100%。Cr(III)的存在促使CaCO晶体从方解石转变为球霰石文石，形成含Cr的碳酸盐化合物和氢氧化物。本研究深入了解了MICP介导的Cr(III)去除机制和最佳条件，突出了其在大规模环境修复中的可行性和有效性，并为Cr污染提供了一种经济且环保的解决方案。
