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

Abstract:

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.

Key words: soil remediation equipment, low-temperature thermal desorption, chlorobenzene, VOCs, ex-situ soil remediation technology