射频加热强化土壤气相抽提技术的应用  

Application of radio frequency enhanced soil vapor extraction

作　　者：杨伟[1,2,3,4] 宋震宇[1,2,3,4] 李野[1,2,3,4] 袁珊珊[2,3,4] 邵兆俊 张景辉[2,3,4] 陈冠益[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]天津生态城环保有限公司,天津300467 [3]天津市污染场地治理修复技术工程中心,天津300467 [4]天津生态城环境检测中心有限公司,天津300467

出　　处：《环境工程学报》2015年第3期1483-1488,共6页Chinese Journal of Environmental Engineering

摘　　要：热强化土壤气相抽提技术是一种高效的土壤治理技术,广泛应用于包气带土壤中挥发性有机污染物的去除。在天津某有机污染场地开展射频加热强化土壤气提技术应用研究,研究了射频阳极连接方式对场地加热效果的影响,并考察了该技术对实验场地的实际修复效果。结果表明,射频阳极采用并联方式连接对场地的加热效果较好,加热10 d后,场地温度升高约40℃;随着SVE系统工作时间的延长,场地温度逐渐下降,土壤气中TVOCs的浓度逐渐下降;经过约2个月的修复,中浅层土壤中污染物的总去除率约90%,氯仿去除率达95%,深层土壤中的污染物去除率约64%。Thermal enhanced soil vapor extraction( SVE) has been effectively used for removal of volatile organic compounds( VOCs) from unsaturated soil. To explore the effectiveness of radio frequency heating enhanced SVE,a field demonstration of SVE remediation was carried out in Tianjin,and the impact of anode connection was studied. The results showed that excellent heating effect was achieved with paralleled anode,the temperature improved by 40℃ after 10 days. The temperature of the contaminated sites and the concentration of TVOCs decreased with the increase of SVE time. Two months after remedy,the 90% TVOCs were removed in middle-shallow soil and 64% were removed in depth.

关 键 词：射频 土壤气相抽提(SVE) 污染场地 修复 

分 类 号：X53[环境科学与工程—环境工程]