重金属污染土壤淋洗技术的基础研究与工程应用进展

Progress in basic research and engineering application of washing/flushing technology for heavy metal contaminated soil remediation

随着城市结构调整,工业企业易地搬迁后遗留下大量污染场地,严重威胁人居环境,亟待开展土壤修复。土壤淋洗技术具有工艺简单、处理范围广、修复效率高和治理费用相对低廉等优点,是目前修复重金属污染土壤最有效的技术之一,同时对于有机物污染土壤也具有显著修复效果。经过大量资料、文献调研,系统梳理土壤淋洗技术在国内的研究现状,结合实际工程案例,重点分析异位土壤淋洗设备的典型工艺技术路线,进而提出未来土壤淋洗技术的基础理论研究和工程应用发展方向,以期为中国重金属污染土壤淋洗技术的推广和应用提供参考。

With the adjustment of urban structure in China,a large number of contaminated sites are retained after the relocation of industrial enterprises.Normally,these sites pose serious threat to the living environment,and it is urgent to carry out soil remediation.Soil washing/flushing technology has the advantages of simple process,wide range of treatment,high remediation efficiency and relatively low treatment cost.Thus,soil washing/flushing technology is one of the most effective technologies for remediation of heavy metal contaminated soil at present,and it also has a significant remediation effect on organic contaminated soil.On the basis of investigating relevant materials and literature,the current research status of washing/flushing technology in China were systematically reviewed.Combined with engineering cases,the technological route of typical ex-situ washing/flushing equipment was analyzed,and then put forward the basic theoretical research and development direction of engineering application of washing/flushing technology in the future,so as to provide reference for the popularization and application of washing/flushing technology in contaminated soil,especially heavy metal contaminated soil in China.