耐镉菌联合植物吸收对土壤重金属镉污染的修复  

Remediation of cadmium-tolerant bacteria combined with plant absorption on soil heavy metal cadmium pollution

作　　者：周慧芳[1] 王京文[2] 孙吉林[2] 李丹[2] 张奇春[1] ZHOU Huifang;WANG Jingwen;SUN Jilin;LI Dan;ZHANG Qichun(Key Laboratory of Environment Remediation and Ecological Health of Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China;Plant Protection Station of Hangzhou City, Hangzhou 310020, China)

机构地区：[1]浙江大学环境与资源学院,污染环境修复与生态健康教育部重点实验室,杭州310058 [2]杭州市植保土肥总站,杭州310020

出　　处：《浙江大学学报（农业与生命科学版）》2017年第3期341-349,共9页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：杭州市科技局项目(20130533B01,20140533B10,20140533B03);浙江省公益项目(2016C32084);国家自然科学基金(41401266)

摘　　要：采用盆栽和大田试验,研究耐镉菌联合超积累景天植物吸收对土壤重金属镉污染的修复作用。结果表明:耐镉菌与十二烷基苯磺酸钠均可活化土壤中难溶态镉,其中十二烷基苯磺酸钠对铁锰结合态镉的活化效果较好,而耐镉菌对残渣态镉的活化能力较好;土壤中潜在可利用态镉转化为活性态镉后可通过贝洋棒(BY棒)或栽培超积累植物来吸收;在耐镉菌与景天植物的联合修复中,伴矿景天所吸收的镉远高于凹叶景天和东南景天的联合修复效果,且修复后土壤的酶活性强,微生物数量丰富。可见,耐镉菌与伴矿景天的联合修复是一种可行的镉污染修复方法。Heavy metal contaminants enter the environment through various means,causing heavy metal pollution in the soil,especially heavy metals in farmland soils,which are becoming increasingly serious.Microorganisms,especially bacteria have a large surface area,are charged and have strong metabolic activity,and play a unique role in remediation of heavy metalcontaminated soil.The cadmium-tolerant strain m6,isolated from cadmium-polluted soil by our lab,has a strong ability to enhance the mobility and bioavailability of heavy metals in soils.Ordinary surfactants also can activate heavy metals and improve the migration and bioavailability of heavy metals in soils,and have a positive effect on the removal of heavy metals in contaminated soils and sediments.In our previous study,a heavy metal adsorbent Beiyang rod(BY rod)was set up,which can adsorb heavy metals including mercury,zinc,cadmium and copper in soils.Therefore,the objective of the present work was to study the remediation effect of cadmium-tolerant strains or surfactants combined with plant absorption and BY rod on soil heavy metal cadmium(Cd)pollution.

关 键 词：土壤镉形态 耐镉菌 超积累植物 微生物活性 

分 类 号：X172[环境科学与工程—环境科学]