典型多氯联苯在太湖底泥微环境中的脱氯降解

发布时间：2018-03-03 23:08

本文选题：太湖　切入点：多氯联苯　出处：《东南大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：以太湖底泥为介质构建反应微环境,考察了商业产品Aroclor系列中9种常见多氯联苯单体(二氯联苯PCB5和PCB12、四氯联苯PCB64和PCB71、类二VA英五氯联苯PCB105和PCB114、六氯联苯PCB149和PCB153、七氯联苯PCB170)在24周时间内的脱氯降解情况.结果显示:太湖底泥中的天然微生物具备降解多氯联苯的能力,9种添加的母体多氯联苯均出现不同程度的脱氯现象,泥浆中多氯联苯总浓度由(49.56±0.38)mg/kg降至(42.19±0.14)mg/kg;脱氯方式以对位脱氯和间位脱氯为主,检测到的主要脱氯产物包括PCB1,PCB2,PCB25,PCB32,PCB47,PCB49,PCB52,PCB66,PCB90,PCB99,PCB101和PCB102;在24周内,微环境体系总二VA英毒性当量(TEQs)从(297±2)pg/g降至(21±5)pg/g,降幅达92.9%,显示出良好的环境解毒效果.
[Abstract]:The reaction microenvironment was constructed with the sediment of Taihu Lake as the medium. The dechlorination degradation of nine common polychlorinated biphenyls (PCB5 and PCB12, PCB64 and PCB71, PCB105 and PCB114, PCB149 and PCB153, PCB170) in commercial Aroclor series was investigated in 24 weeks. The results show that the natural microorganisms in the sediment of Taihu Lake have the ability to degrade PCBs. All of the 9 kinds of mother PCBs are dechlorinated to varying degrees. The total concentration of PCBs in the mud decreased from 49.56 卤0.38 mg / kg to 42.19 卤0.14 mg / kg; the main dechlorination methods were paratactic dechlorination and para-dechlorination. The main dechlorination products detected included PCB32PCB47PCB49PB52PCB6B90PCB90PCB9PCB101 and PCB102PCB90PCB90PCB9PCB101and PCB102PCB9PCB101 and PCB102PCB9PCB101, PCB9PCB101 and PCB102PCB9PCB101 and PCB102PCB9PCB101 and PCB102PCB9PCB101 and PCB102. The total diVA toxicity equivalent (TEQs) of the microenvironment system decreased from 297 卤2 g / g to 21 卤5 g / g, a decrease of 92.9%, showing a good environmental detoxification effect.
【作者单位】：东南大学土木工程学院;中国电建集团华东勘测设计研究院有限公司;
【基金】：国家自然科学基金资助项目(41671468,41301546,51408119) 南京大学污染控制与资源化国家重点实验室开放基金资助项目(PCRRF16018)
【分类号】：X524

【参考文献】