Study on Reductive Dechlorination of PCBs in Groundwater by Fe/Zn Bimetal

• 作者: LIU Yuan-yuan ZHANG Lan-ying QIU Ming-ying REN He-jun DU Jun
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 双金属系统 还原脱氯 地下水 PCB 锌 铁 多氯联苯 印刷电路板
• 年，卷（期）: 2012,（7）
• 页码范围: 42-45
• 页数: 4页
• 分类号: X503

摘要

[Objective]The research aimed to study reductive dechlorination effect of PCBs in groundwater by Fe /Zn bimetal. [Method]Fe /Zn bimetal as reduction system,PCBs degradation ratio as inspected index,degradation effect of PCBs by Fe /Zn bimetallic system when adding selfmade hydroxypropyl-β-cyclodextrin ( HP-β-CD) was studied. Meanwhile,we investigated the influences of loading ratio and Fe-Zn dosage on PCBs dechlorination. [Result]PCBs was significantly solubilized by the synthesized HP-β-CD. With increase of the HP-β-CD concentration,the apparent solubility of PCBs increased linearly,forming 1∶1 inclusion complex. When Fe-Zn dosage was 10 g,and mass fraction of Zn was 7%,the dechlori-nation efficiency of 321 μg /L PCBs was 47. 6% after degrading for 7 d at 10 ℃. [Conclusion]The research provided theoretical guiding for in situ remediation of the groundwater contaminated by PCBs.