氯苯类易挥发有机污染土壤异位低温热脱附实例研究  

Case Study On Ex-situ Remediation of Chlorobenzene-Like Volatile Organic Compounds(VOCs) Contaminated Soil With Technique of Low-Temperature Thermal Desorption

作　　者：王湘徽 祝欣[2] 龙涛[2] 邓绍坡[2] 林玉锁[2] 胡韬 

机构地区：[1]上海康恒环境股份有限公司,上海200040 [2]环境保护部南京环境科学研究所,江苏南京210042 [3]南京市燕子矶片区整治开发有限责任公司,江苏南京210028

出　　处：《生态与农村环境学报》2016年第4期670-674,共5页Journal of Ecology and Rural Environment

基　　金：上海市科委社发类重点支撑课题(13231202501);国家高技术研究发展计划(2013AA06A608)

摘　　要：针对南京市某大型化工企业退役场地,结合场地修复目标,使用生石灰对场地氯苯类挥发性有机污染物(VOCs)污染土壤进行异位低温热脱附处理。实验室试验结果表明,该方法可有效去除土壤中的VOCs,处理后各污染物去除率均达85%以上。在现场试验中,采用专业土壤修复设备KH200进行土壤破碎和药剂混合,处理过程全封闭运行,可有效降低扬尘等问题。通过投加生石灰提高土壤温度、降低土壤含水量的方法,有效地促进了土壤中VOCs的解吸和挥发,是一种高效率、低成本的土壤修复技术,经过KH200修复设备处理后土壤中各污染物均达到场地修复目标,具备工程应用可行性。The technique of low-temperature thermal desorption was used to remedy chlorobenzene-like VOCs contaminated soil. Results show that VOCs were effectively removed after the treatment,with removal rate reaching 85% or more for all the tested VOCs. In field trials,a specialized soil remediation machine KH200 was used to crush the soil and have it mixed with lime in full-closed operation to avoid dust pollution. Through raising soil temperature and lowering soil water content,desorption and volatilization of VOC was effectively accelerated. All the findings in the experiment demonstrate that the use of the technique of low-temperature thermal desorption and the KH200 equipment is a promising approach to efficient and low cost remediation of contaminated soils in sites of deserted chemical plants.

关 键 词：土壤修复设备 低温热脱附 氯苯 易挥发性有机物 异位土壤修复技术 

分 类 号：X53[环境科学与工程—环境工程]