摘要
为研究微生物修复在土壤中的适用情况,以实验室模拟巴氏芽孢杆菌(Bacillus pasteurii)诱导碳酸钙共沉淀(Microbilly induced calcite precipitation,MICP)稳定化土壤中的Pb。结果表明,采用MICP技术对土壤pH值、电导率及有机物含量等基础理化性质有很大的影响。土壤中Pb的浸出率最高下降76.34%,重金属Pb有效态的比例下降了41.64%,Pb的碳酸盐结合态的含量最高升高13.24%。同时通过SEM和XRD分析,可以观察到土壤中Pb与碳酸钙共沉淀附着在土壤颗粒表面而被固定下来。因此,MICP技术是一种具有应用前景的土壤中Pb污染的修复技术方法。
Microbilly induced calcite precipitation(MICP)was used to stabilized Pb by Bacillus pasteurii to investigate the remediation effects in polluted soil.The leaching rate of Pb in soil decreased by 76.34%,the content of available state decreased by 41.64%,and the content of carbonate binding state increased by 13.24%by the bacterium due toits co-precipitation with calcium carbonate.Pb were co-precipitated with calcium carbonateon thesurface of soil particles according to SEM and XRD analysis.MICP technology has great applicationprospectson the remediation of Pb pollution soil.
作者
陈敏洁
李亚飞
李博文
姜晓茹
郑春丽
CHEN Minjie;LI Yafei;LI Bowen;JIANG Xiaoru;ZHENG Chunli(School of Life Science and Technology,Inner Mongolia University of Science and Technology,Baotou 014010,China;School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《有色金属工程》
CAS
北大核心
2020年第12期128-134,共7页
Nonferrous Metals Engineering
基金
国家重点研发计划项目(2018YFC1802904)
国家自然科学基金资助项目(41561094,41867061)
内蒙古自然科学基金(2017MS0401)。
