| 土壤污染的修复方法研究——以表面活性剂强化微米Fe/Cu对有机氯农药的降解为例 |
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| 关键词:Fe/Cu bimetal surfactant hexachlorocyclohexane dichloro-diphenyl-trichloroethane |
| 基金项目:国家自然科学基金青年基金(编号: 41201311); 江苏省高校自然研究重大项目(编号: 12KJA180003); 江苏省环保科研课题(编号: 2013026); 江苏高校优势学科建设工程资助项目(PAPD); 南京林业大学2014年大学生实践创新训练计划项目 |
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| The Remediation Method for Contaminated Soil: A Case Study of Degradation of Organochlorine Pesticides by Surfactant-Enhanced Fe/Cu Bimetallic System |
| The polluted soil with main pollutants as hexachlorocyclohexane (HCH) and dichloro-diphenyl-trichloroethane (DDT) was dechlorinated using the bimetallic system made of micron iron powder and Cu. And the effects of micron Fe/Cu with surface active agents (rhamnolipid and Triton X-100 (TX-100)) on dechlorination efficiency of polluted soil containing organic-chlorine pesticide were analyzed. The results showed that Oxidation-Reduction Potential(ORP）of polluted soil increased slowly with time 35 d after the addition of micron Fe/Cu, with both surface active agents comparing with micron Fe/Cu only and control experiment. ORP was raised from –400 mV to –300 mV 55 d after the addition of micron Fe/Cu with TX-100; pH increased with time during the first 25 d from 5.0 to 6.5~7.2 except for the addition of micron Fe/Cu with rhamnolipid; the bimetallic system made of micron Fe/Cu had more efficient dechlorination effect relative to zero-valent iron, and both surface active agents, especially TX-100, improved the dechlorination efficiency of micron Fe/Cu in polluted soil. The pollutants removal rate was 90.0% and the removal rates of α-HCH, γ-HCH, P, P’-DDD & P, P’-DDT were 100%, 92.2%, 95.7% and 85.4%, respectively, 55 d after the addition of micron Fe (5%), Cu (1%) and TX-100 (5 mmoL/L) with initial pH at 4.5. |
| LI Chuan,YU Yuan,WAN Jin-zhong,WANG Xin-xin,BIAN Shi-yi,FEI Fei,XUE Jian-hui.2015.The Remediation Method for Contaminated Soil: A Case Study of Degradation of Organochlorine Pesticides by Surfactant-Enhanced Fe/Cu Bimetallic System[J].Acta Geoscientica Sinica,36(4):493-499. |
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