热强化循环井驱动热量传输及苯胺修复效果

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Abstract In-situ thermal remediation technology was adopted to enhance the remediation effect of circulation well on semi-volatile organic pollutants in this study. The effects of aeration flow rate, heating temperature and groundwater velocity on the heat transfer law of thermal enhanced circulation well were primarily investigated. Additionally, the remediation effect of aniline contaminated groundwater by thermal enhanced circulation well was simulated. The results revealed that the heat transfer law mainly depends on the hydraulic stimulation of the circulation well. The variation of the heating area with time can be accurately represented by an exponential function. In the medium sand aquifer, when the aeration flow rate was 0.3m³/h, the temperature was 60℃, and the groundwater flow rate was 0.2m/d, the heat transfer has the best operation effect. In the process of enhanced remediation of aniline contaminated groundwater, an efficient remediation area centered on the circulating well was gradually formed. After 48h of remediation, the average concentration of aniline decreased from 97.95mg/L to 0.168mg/L. In compared with the single circulating well technology, remediation effect has been improved 25.8% by integrated remediation technology, effectively avoiding the occurrence of tailing phenomena.

Key words： circulation well in-situ thermal remediation heat transfer law aniline enhance remediation effect

Received: 05 January 2023

PACS:

X523

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	LU Liang
	PU Sheng-yan
	LI Bo-wen

Cite this article:

LU Liang,PU Sheng-yan,LI Bo-wen. Study on heat transfer and aniline remediation effect of thermal enhanced circulation well[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(9): 4639-4647.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I9/4639

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