氧化硫硫杆菌对电动修复铀污染土壤的强化作用  

Enhancement Effect of Acidithiobacillus Thiooxide on Electrokinetic Remediation of Uranium Contaminated Soil

作　　者：丁德馨[1] 董雪 张辉[1] 成浩 胡南[1] 王永东[2] 戴仲然 马建洪 DING Dexin;DONG Xue;ZHANG Hui;CHENG Hao;HU Nan;WANG Yongdong;DAI Zhongran;MA Jianhong(Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy,University of South China,Hengyang 421001,China;Hunan Province Key Laboratory of Green Development Technology for Extremely Low Grade Uranium Resources,University of South China,Hengyang 421001,China)

机构地区：[1]南华大学铀矿冶生物技术国防重点学科实验室,湖南衡阳421001 [2]南华大学极贫铀资源绿色开发技术湖南省重点实验室,湖南衡阳421001

出　　处：《有色金属工程》2022年第1期129-136,共8页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(U1967210,11775106);国家安全基金项目(32104060202);湖南省科技人才托举项目(2020TJ-Q03);湖南省教育厅重点资助项目(19A436)。

摘　　要：先构建一电动修复单元,研究了修复时长、电解液及电压梯度对电动修复铀污染土壤的影响。结果表明,在修复时长为7 d、电解液为0.1 mol/L柠檬酸与0.03 mol/L氯化铁混合液、电压梯度为1 V/cm及电极为石墨电极的条件下,该电动修复单元的修复效果达到最优;再在此基础上,向此电动修复单元接种氧化硫硫杆菌,构建一微生物-电动修复单元,研究了微生物对电动修复铀污染土壤的强化作用。结果表明,电动修复单元与微生物-电动修复单元中铀的去除率分别为65.12%和70.68%。氧化硫硫杆菌对电动修复铀污染土壤具有显著的强化作用,微生物-电动修复是一种有发展前景的强化方法。An electrokinetic remediation unit was constructed to study the effect of electrokinetic treatment time,electrolyte and voltage gradient on the electrokinetic treatment of the uranium contaminated soil.It was found that the remediation unit worked most efficiently when the optimal remediation time was 7 days,electrolyte was the mixture of 0.1 mol/L citric acid with 0.03 mol/L ferric chloride,the voltage gradient was 1 V/cm and electrode was graphite.On this basis,a microbial-electrokinetic remediation unit was constructed by inoculating Acidithiobacillus Thiooxide into the electrokinetic remediation unit to study the enhancement effect of microorganisms on electrokinetic remediation of uranium contaminated soil.The results indicated that the removal rates of uranium from soil in electrokinetic remediation unit and microbial-electrokinetic remediation unit were 65.12%and 70.68%,respectively.This study shows that Acidithiobacillus Thiooxide can significantly enhance the effect of electrokinetic remediation of uranium contaminated soil,and the microbial-electrokinetic remediation is a promising enhancement method.

关 键 词：电动修复 铀污染土壤 微生物 强化作用 

分 类 号：X53[环境科学与工程—环境工程]