An innovative method for soil vapor extraction to improve extraction and tail gas treatment efficiency

被引：7
|
作者：
Ding, Yang [1 ,2 ]
Zhang, Yuling [1 ,2 ]
Deng, Zhiqun [1 ,2 ]
Song, Hewei [1 ,2 ]
Wang, Jili [1 ,2 ]
Guo, Haizhao [3 ]
机构：
[1] Jilin Univ, Key Lab Groundwater Resources & Environm, Minist Educ, Changchun 130021, Peoples R China
[2] Coll New Energy & Environm, Changchun 130021, Peoples R China
[3] Jilin Univ, Acad Affairs Off, Changchun 130021, Peoples R China
来源：
SCIENTIFIC REPORTS | 2022年 / 12卷 / 01期
基金：
中国国家自然科学基金;
关键词：
VOLATILE ORGANIC-COMPOUNDS; CONTAMINATED SOIL; REMOVAL; REMEDIATION; ZONE; VOCS; OXIDATION; PROGRESS;
D O I：
10.1038/s41598-022-08734-8
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
This study aims to improve soil vapor extraction (SVE) to address its shortcomings in treating halogenated hydrocarbon-contaminated soil. Indoor simulation experiments based on SVE were conducted to provide technical guidance for the remediation of 1,2-DCA-contaminated soil, with the overall intention of soil repair and ecological restoration. A thermal oxidation SVE (TOSVE) system was designed on the basis of SVE technology for application in the remediation of low-permeability soil contaminated with halogenated hydrocarbons from a chemical plant in Northeast China. Laboratory simulation experiments were conducted based on TOSVE technology to study the removal of target pollutants under different organic contents, moisture and air speeds. For the first time, a new material, scoria, was added to the oxidant at different proportions, and its effect on the exhaust gas treatment efficiency was examined. Thermal extraction improved the extraction efficiency of pollutants from low-permeability soil. Moreover, the adsorption-oxidation effect of 0.1-0.25 mm scoria prepared by 20% Na2S2O8 on 1,2-dichloroethane (1,2-DCA) in tail gas was higher than that of the oxidant without scoria, indicating that scoria is effective in tail gas treatment.
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页数：11
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