四川轻化工大学学报（自然科学版）2025，Vol.38Issue(1)：11-19,9.DOI:10.11863/j.suse.2025.01.02
两步MICP法修复Cu2+污染液研究
Study on Remediation of Cu2+-contaminated Solutions Based on Two-step MICP Method
摘要
Abstract
Due to the susceptibility of bacterial activity to heavy metal toxicity,the traditional microbially induced carbonate precipitation(MICP)method has poor remediation effect on some heavy metals such as Cu and Cd.However,the two-step MICP method adopts the hydrolyzation first followed by the remediation,which can effectively break through the limitation of heavy metal toxicity and improve the bioremediation efficiency.Through a series of Cu2+contaminated solution remediation experiments,the influence factors such as initial Cu2+concentration,calcium chloride concentration,hydrolyzed solution volume,treatment method and remediation time on the remediation effect parameters,such as solution pH,precipitation increase mass,Cu2+removal ratio and Ca2+sedimentation rate,are investigated.The results show that the Cu2+removal ratio increased from 17%(traditional method)to 76%(two-step MICP method)after 24 h remediation,and the remediation rate of the two-step MICP method is up to 7 times than that of the traditional method.Within the experimental range,the increase of the initial Cu2+concentration will not reduce the remediation of Cu2+-contaminated solution by the two-step MICP method,and the appropriate elevation of the Ca2+concentration effectively improves the Cu2+removal ratio.When the initial Cu2+concentration is between 1800 to 2400 mg·L-1,the calcium chloride concentration is 1.6 mol·L-1,and the volume of hydrolyzed solution is 5 mL,the reactants utilization and Cu2+removal ratio are highest.The remediation effect of the two-step MICP method is optimal,which can provide a reference for the efficient remediation of Cu-contaminated soil.关键词
生物修复/Cu2+污染液/微生物诱导碳酸盐沉淀/两步MICP法/去除率Key words
bioremediation/Cu2+-contaminated solution/microbially induced carbonate precipitation/two-step MICP method/removal ratio分类
资源环境引用本文复制引用
陈维,曾晨,陆海军,段雨蓬,潘焯航..两步MICP法修复Cu2+污染液研究[J].四川轻化工大学学报（自然科学版）,2025,38(1):11-19,9.基金项目
湖北省自然科学基金项目(2022CFA011 （）
2023AFD214) （）
湖北省教育厅科学研究计划青年人才项目(Q20231611) （Q20231611）
