| 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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| 引用本文：李川,禹媛,万金忠,王新新,卞师怡,费菲,薛建辉.2015.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[J].地球学报,36(4):493-499. |
| DOI：10.3975/cagsb.2015.04.12 |
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| 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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| 中文摘要:利用Cu作为催化金属与微米铁制成双金属体系处理主要污染物为六六六(HCH)和滴滴涕(DDT)的某污染场地土壤, 探讨了不同表面活性剂(鼠李糖脂与Triton X-100(TX-100))对微米Fe/Cu双金属体系降解土壤中有机氯农药的影响。结果表明: 相对于空白和只添加零价铁与微米Fe/Cu的三组的稳定, 添加了两种表面活性剂的Fe/Cu双金属体系, 35 d后土壤氧化还原电位(ORP)随时间呈缓慢上升趋势, Fe/Cu+TX-100至55 d时ORP由–400 mV升高到–300 mV; 除Fe/Cu+鼠李糖脂组外, 0~25 d内各组土壤pH随时间逐渐升高, 从初始的5.0左右提高到6.5~7.2; 微米Fe/Cu对污染物的降解效果相比零价铁有提高, 鼠李糖脂与TX-100的投加能强化微米Fe/Cu对土壤中HCH和DDT的降解, TX-100的增强效果更为显著。当Fe投加量5%, Cu负载1%, TX-100浓度5 mmoL/L, 初始pH 4.5时, 处理55d后, α-HCH、γ-HCH、P, P’-DDD和P, P’-DDT的降解去除率达到100%、92.2%、95.7% 和85.4%, 总污染物去除率为90.0%。 |
| 中文关键词:Fe/Cu双金属 表面活性剂 六六六 滴滴涕 |
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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 |
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| Abstract: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. |
| keywords:Fe/Cu bimetal surfactant hexachlorocyclohexane dichloro-diphenyl-trichloroethane |
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