| 耐镉细菌联合电动技术修复镉污染土壤的研究 |
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| 引用本文： | 尹静玄,王平,徐海音,张睿琦,赵珮伶,聂香兰,彭创新,龚绘林,梁云涛.耐镉细菌联合电动技术修复镉污染土壤的研究[J].环境科学学报,2020,40(6):2212-2219. |
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| 作者姓名： | 尹静玄 王平 徐海音 张睿琦 赵珮伶 聂香兰 彭创新 龚绘林 梁云涛 |
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| 作者单位： | 中南林业科技大学环境科学与工程学院,长沙410004,中南林业科技大学环境科学与工程学院,长沙410004,中南林业科技大学环境科学与工程学院,长沙410004,中南林业科技大学环境科学与工程学院,长沙410004,中南林业科技大学环境科学与工程学院,长沙410004,中南林业科技大学环境科学与工程学院,长沙410004,中南林业科技大学环境科学与工程学院,长沙410004,中南林业科技大学环境科学与工程学院,长沙410004,中南林业科技大学环境科学与工程学院,长沙410004 |
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| 基金项目： | 湖南省重点研发项目（No.2016SK2030）；国家自然科学基金（No.51908561）；大学生创新创业训练项目（No.201910538067X，S201910538035）；湖南省教育厅重点项目（No.18A163） |
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| 摘 要： | 为提高传统电动技术对重金属污染土壤的修复效果以及经济效益，本研究采用耐镉细菌联合电动修复技术修复镉污染土壤.通过在含镉土壤中接种3种耐镉细菌Escherichia coli strain、Bacillus sp.和Bacillus cereus strain，以电压梯度1 V·cm-1通电10 d，比较不同耐镉细菌对土壤Cd去除和形态转化，以及电能消耗的影响.结果表明，接种Escherichia coli strain、Bacillus sp.、Bacillus cereus strain的试验组比传统电动修复的Cd去除率分别提高7.63%、17.21%、19.53%；单位修复能耗分别降低64.78、109.52、116.54 kW·min·mg-1.由于Bacillus cereus strain对Cd2+的吸附量高于Escherichia coli strain和Bacillus sp.，且能有效降低土壤中Cd的生物毒性，因此采用Bacillus cereus strain联合电动技术修复镉污染土壤时效果最佳，Cd去除率达到30.77%，单位修复耗能为48.94 kW·min·mg-1.
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| 关 键 词： | 电动-微生物修复 耐镉细菌 镉污染土壤 镉去除 |
| 收稿时间： | 2019/11/7 0:00:00 |
| 修稿时间： | 2020/1/7 0:00:00 |
Study on the remediation of cadmium contaminated soil by cadmium-tolerant strains combined with electrokinetic remediation technology |
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| YIN Jingxuan,WANG Ping,XU Haiyin,ZHANG Ruiqi,ZHAO Peiling,NIE Xianglan,PENG Chuangxin,GONG Huilin and LIANG Yuntao.Study on the remediation of cadmium contaminated soil by cadmium-tolerant strains combined with electrokinetic remediation technology[J].Acta Scientiae Circumstantiae,2020,40(6):2212-2219. |
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| Authors: | YIN Jingxuan WANG Ping XU Haiyin ZHANG Ruiqi ZHAO Peiling NIE Xianglan PENG Chuangxin GONG Huilin and LIANG Yuntao |
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| Institution: | College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004,College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004,College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004,College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004,College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004,College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004,College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004,College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004 and College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004 |
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| Abstract: | To improve the treatment and cost efficiency of traditional electrokinetic (EK), this study used Cd-tolerant strains combined with EK on cadmium (Cd) contaminated soil remediation. Cd removal and energy consumption were evaluated by inoculating different Cd-tolerant strains, Escherichia coli, Bacillus sp. and Bacillus cereus in soil with 10 days under a 1V·cm-1. The results showed that the Cd removal efficiency with Escherichia coli, Bacillus sp. and Bacillus cereus was 7.63%, 17.21% and 19.53% respectively, which were higher than traditional EK treatment. In addition, the energy consumption with Escherichia coli, Bacillus sp. and Bacillus cereus was 64.78, 109.52 and 116.54 kW·min·mg-1 respectively, which were lower than traditional EK treatment. Bacillus cereus had a higher adsorption capacity and a lower toxicity of Cd in soil than Escherichia coli and Bacillus sp.. So Bacillus cereus combined with EK was applied and achieved the highest Cd removal efficiency of 30.77% and the lowest energy consumption 48.94 kW·min·mg-1. |
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| Keywords: | electro-bioremediation cadmium-tolerant strains Cd contaminated soil cadmium removal |
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