REMOVAL OF BENZENE FROM CLAY SOIL IN NORTHEASTERN CHINA BY THERMAL ENHANCED SOIL VAPOR EXTRACTION

LI Xiaojie; ZHANG Wenwen; MA Chuanbo; MA Fujun; GU Qingbao; XU Duanping

doi:10.13205/j.hjgc.202204019

Volume 40 Issue 4

Apr. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(4): 134-139,187

LI Xiaojie, ZHANG Wenwen, MA Chuanbo, MA Fujun, GU Qingbao, XU Duanping. REMOVAL OF BENZENE FROM CLAY SOIL IN NORTHEASTERN CHINA BY THERMAL ENHANCED SOIL VAPOR EXTRACTION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(4): 134-139,187. doi: 10.13205/j.hjgc.202204019

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LI Xiaojie, ZHANG Wenwen, MA Chuanbo, MA Fujun, GU Qingbao, XU Duanping. REMOVAL OF BENZENE FROM CLAY SOIL IN NORTHEASTERN CHINA BY THERMAL ENHANCED SOIL VAPOR EXTRACTION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(4): 134-139,187. doi: 10.13205/j.hjgc.202204019

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REMOVAL OF BENZENE FROM CLAY SOIL IN NORTHEASTERN CHINA BY THERMAL ENHANCED SOIL VAPOR EXTRACTION

doi: 10.13205/j.hjgc.202204019

1. College of Resources and Environment Engineering, Liaoning Technical University, Fuxin 123000, China;
2. Department of Contaminted Site Risk Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

Received Date: 2021-08-05
Available Online: 2022-07-06

Abstract

Abstract

Taking the clay in Northeastern China as the research object, the contaminated soil was simulated, and the effects of extraction rate, soil water content and thermal enhancement on the remediation of benzene-contaminated soil by soil vapor extraction were studied. At the same time, the heat transfer effect of soil with different water content and the variation law of soil temperature under the heating condition of central heat source were explored. The results showed that: 1) the best pumping rate for the remediation of benzene-contaminated soil by soil vapor extraction was 10 L/min; 2) in the clay soil with water content of 5%~20%, the remediation effect of soil vapor extraction decreased with the increase of soil water content, but under the effect of thermal enhancement, the repair effect decreased and then increased with the increase of soil water content, and the repair effect was the best when the water content was 5%; 3) under the condition of central heat source heating, the soil temperature showed nonlinear attenuation along the radial direction from the heat source, and the attenuation was more obvious near the heat source point; 4) when thermal enhanced soil vapor extraction was used to repair benzene-contaminated clay, the restoration performance were best when the temperature of the central heat source was 160 ℃.
- soil vapor extraction,
- thermal enhanced,
- clay soil,
- benzene

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References

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