Box Experiment Study of Thermally Enhanced SVE for Benzene

Qixiang Zhang, Qiyan Feng, Xueqiang Zhu, Mei Zhang, Yanjun Wang and Liu Yang
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Qixiang Zhang: School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
Qiyan Feng: School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
Xueqiang Zhu: School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
Mei Zhang: Jiangsu Design Institute for Mineral Resources, Xuzhou 221000, China
Yanjun Wang: Jiangsu Design Institute for Mineral Resources, Xuzhou 221000, China
Liu Yang: Jiangsu Design Institute for Mineral Resources, Xuzhou 221000, China

IJERPH, 2021, vol. 18, issue 8, 1-14

Abstract: In order to describe the changes of soil temperature field, air flow field and remediation situation with time during the process of thermally enhanced SVE (soil vapor extraction), a remediation experiment of benzene contaminated soil with single extraction pipe was carried out in a box device. The results showed that the whole temperature of the system was raised to 80 °C in 4 h. 43% of benzene were removed in the first 2% of the extraction time. After 24 h, the repair efficiency was close to 100%. The device can efficiently remove benzene from soil. By continuously monitoring the parameters in the operation process of the system, the spatial distribution of temperature and soil gas pollutant concentration with time was plotted. It showed the benzene concentration distribution in the soil gas was more consistent with the temperature distribution before the start of ventilation, and the concentration of benzene in the soil gas dropped rapidly after ventilation, while the temperature distribution was almost unaffected. In the treatment of soil with a benzene content of 17.8 mg?kg ?1 , when the soil gas benzene concentration is the highest at 180 min, the peak value is 11,200 mg?m ?3 , and the average concentration is 7629.4 mg?m ?3 .

Keywords: soil vapor extraction; benzene; thermal enhancement; soil gas (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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