摘要
本文针对重金属污染的淤泥质土展开了净化修复作用研究.通过微生物诱导碳酸钙沉积(MICP)技术,利用巴氏芽孢杆菌自身脲酶水解尿素产生碳酸根离子,与淤泥质土体中重金属离子生成沉淀,探究淤泥质土体中不同重金属离子、不同老化期的净化修复效率.研究表明,污染淤泥质土在MICP作用下净化修复都很显著,基本净化效率达到了80%.对于不同重金属离子、混合污染程度及老化期,固定效率有所差异.
In this paper,the purification and remediation of heavy metal contaminated muddy soil was studied.By using MICP technology,bicarbonate ions were produced by urease hydrolysis of Bacillus pasteurei,and precipitated with heavy metal ions in muddy soil,to explore the purification and repair efficiency of different heavy metal ions in muddy soil and different aging periods.The results show that the remediation of contaminated muddy soil under the action of MICP is very significant,and the basic purification efficiency reaches 80%.For different heavy metal ions,mixed pollution degree and aging period,the fixation efficiency is different.
作者
周威
刘冬
王延宁
Ankit Garg
林鹏
ZHOU Wei;LIU Dong;WANG Yanning;Ankit GARG;LIN Peng(Department of Civil and Environmental Engineering,Shantou University,Shantou 515063,Guangdong,China;Guangdong Structural Safety and Monitoring Engineering Technology Research Center,Shantou 515063,Guangdong,China)
出处
《汕头大学学报（自然科学版）》
2020年第4期63-68,共6页
Journal of Shantou University：Natural Science Edition
基金
广东省自然科学基金资助项目(10151503101000006)
汕头大学科研启动基金资助项目(NTF19008)
广东省基础与应用基础研究基金资助项目(2020A1515011398)。
关键词
MICP技术
淤泥质土
重金属
老化期
固定效率
MICP technology
muddy soil
heavy metals
aging period
fixation efficiency
