SRB-沸石联合技术对土壤铅的固定效果  

Effect of SRB-zeolite technology on immobilization of lead in soil

作　　者：魏威 余江[1,2] 王亚婷 陶红群 邓思维 冉宗信[1,2] WEI Wei;YU Jiang;WANG Yating;TAO Hongqun;DENG Siwei;RAN Zongxin(College of Architecture and Environment,Sichuan University,Chengdu 610065,Sichuan Province,P.R.China;Institute of New Energy and Low Carbon Technology,Sichuan University,Chengdu 610065,Sichuan Province,P.R.China;Chengdu Environmental Protection Science Research Institute,Chengdu 610072,Sichuan Province,P.R.China)

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]四川大学新能源与低碳技术研究院,四川成都610065 [3]成都市环境保护科学研究院,四川成都610072

出　　处：《深圳大学学报（理工版）》2018年第6期597-602,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(31100374)~~

摘　　要：为解决土壤重金属铅污染问题,采用铅污染土壤模拟受控实验,探究3种化学固定剂(沸石、硅藻土和有机改良膨润土)和2种不同特性的微生物制剂(硫酸盐还原菌(sulfate-reducing bacteria,SRB)和有效微生物群(effective microorganisms,EM)菌),在单独作用条件下对土壤重金属铅的固定效果.结果显示,分别单独施加沸石或有机改良膨润土,可有效固定土壤重金属铅,最佳固定效率分别为61. 1%和21. 6%,而硅藻土对土壤中铅的固定效果不明显; SRB对土壤铅具有一定的固定作用,而EM菌对土壤中的铅起到活化作用.探究了最佳单一固定剂沸石与具有固定效果的SRB通过组配对土壤铅的固定效果,结果表明,沸石和SRB组配能显著降低土壤中铅的活性,其固定效率可达到70. 14%.沸石和SRB结合应用,有望成为土壤中重金属铅治理的新方法.In order to solve heavy metal lead pollution problem in soil,we investigate the effects of three chemical fixatives(zeolite,diatomite,organic modified bentonite)and two microbial preparations(sulfate-reducing bacteria(SRB),effective microorganisms(EM))with different characteristics on the immobilization of lead in soil.The results show that the zeolite or organic modified bentonite could effectively immobilize lead in soil,and their optimal fixation efficiencies are 61.1%and 21.6%,respectively.However,the effect of diatomite on lead fixation in soil is not obvious.SRB could immobilize lead in soil,and EM bacteria plays important role in the activation of lead in soil.Moreover,the immobilization effect on lead in soil are also investigated in this study by combining zeolite,which is the best single passivator,and SRB with immobilization.The results show that the combination of zeolite and SRB could significantly reduce the activity of lead in soil,and the fixation efficiency could reach 70.14%.It is thus expected that the application of the combination of zeolite and SRB may be a new method for the treatment of heavy metal lead in soil.

关 键 词：生物材料学 土壤 铅污染 硫酸盐还原菌 沸石 化学固定 浸出毒性 

分 类 号：X53[环境科学与工程—环境工程]