有机毒物污染土壤的淋洗化学修复技术研究

The Technology Remediation of Organic Compounds Contaminated Soil by Chemical Leaching

研究了以表面活性剂为助剂的化学淋洗法处理硝基苯和苯胺污染土壤的修复技术。研究发现,淋洗法处理硝基苯污染的土壤,硝基苯洗脱效率可达85%以上。淋洗后土壤中硝基苯含量完全能够达到居住区土壤中硝基苯质量比为58 mg/kg的评价标准,且仅为评价标准的50%,表明淋洗法处理硝基苯污染土壤成效显著。淋洗法处理苯胺污染的土壤,苯胺洗脱效率可达90%以上。淋洗后土壤中苯胺含量完全能够达到居住区土壤中苯胺质量比为240mg/kg的评价标准,且仅为评价标准的36%,表明淋洗法处理苯胺污染土壤成效显著。

Remediation of nitrobenzene and aniline contaminated soil by chemical leaching with surfactant additives was investigated. The results showed that elution efficiency of the nitrobenzene was above 85%. After leaching, the nitrobenzene content in the soil could entirely achieve the soil evaluation criteria of residential area （58 mg/kg）, which was only 50% of the evaluation criteria. The aniline concentration after leaching could also achieve the soil evaluation criteria of residential area （240 mg/kg）, which was only 36% of the evaluation criteria. The eluting rate of aniline was over 90%. Remarkable leaching effect of both nitrobenzene and aniline from the contaminated soil was indicated in this study.