纳米零价铁与降解菌联合修复多氯联苯污染土壤效果的研究  

Effect of remediation of polychlorinated biphenyls(PCBs)contaminated soil by combined treatment of nanoscale zero-valent iron and PCBs-degrading strain

作　　者：邵绿扬 陈曦 沈超峰[3] SHAO Lyuyang;CHEN Xi;SHEN Chaofeng(Department of Water Resources and Environmental Engineering,Tamkang University,New Taipei City 25137,Taiwan,China;Shanghai Chemical Engineering Monitoring Station for Environment Protection,Shanghai 200050,China;College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,Zhejiang,China)

机构地区：[1]淡江大学水资源及环境工程研究所,中国台湾新北25137 [2]上海市化工环境保护监测站,上海200050 [3]浙江大学环境与资源学院,浙江杭州310058

出　　处：《浙江大学学报（农业与生命科学版）》2023年第3期389-397,共9页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家重点研发计划项目“华东废旧电器拆解场地污染区修复技术集成与工程示范”(2019YFC1803700)。

摘　　要：多氯联苯(polychlorinated biphenyls, PCBs)是土壤中典型的污染物,纳米零价铁(nanoscale zero-valent iron,n ZVI)可以高效地将高氯代PCBs脱氯成更容易被微生物降解的低氯代PCBs。本研究从浙江省台州市某电子垃圾拆解场采集了受PCBs污染的土壤样品,采用nZVI与PCBs降解菌嗜吡啶红球菌(Rhodococcus pyridinovorans)R04开展联合修复研究,考察其对PCBs的去除效果。结果表明:nZVI与降解菌R04联合处理对土壤中PCBs总量及各氯代PCB同类物的去除效果均优于nZVI或R04单独处理;nZVI与降解菌R04联合处理32 d时,土壤中PCBs去除率达59.4%,高于单独使用nZVI的去除率(46.1%),也显著高于单独使用降解菌R04的去除率(34.4%,P<0.05)。因此,nZVI与降解菌联合修复PCBs污染土壤具有较好的应用潜力。Polychlorinated biphenyls(PCBs)are typical pollutants in soil.Nanoscale zero-valent iron(nZVI)can effectively dechlorinate high-chlorinated PCBs into low-chlorinated PCBs which can be more easily degraded by microorganisms.In this study,soil samples contaminated by PCBs were collected from an e-waste recycling site in Taizhou,Zhejiang Province.The remediation of combined nZVI and PCBs-degrading strain Rhodococcus pyridinovorans R04 was carried out to investigate the removal effect of PCBs in soil.The results showed that the combined treatment of nZVI and degrading strain R04 had better effects than the treatment of nZVI or R04 alone in removing PCBs or various chlorinated PCB congeners in soil.After combined treatment with nZVI and degrading strain R04 for 32 d,the removal rate of PCBs in soil reached 59.4%,which was higher than 46.1%of nZVI treatment and 34.4%of degrading strain R04 treatment(P<0.05).Therefore,the combination of nZVI and degrading bacteria in the remediation of PCBs contaminated soil has good application potential.

关 键 词：多氯联苯 脱氯 纳米零价铁 降解菌 土壤污染修复 

分 类 号：X53[环境科学与工程—环境工程]