ERT法监测高压旋喷修复PAHs污染现场试验研究

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Abstract In this study, sodium persulfate (PS) was selected as the oxidant, Fe⁰[μm], Fe⁰[nm, BC-nZVI and NaOH were chosen as activators, and repair PAHs-contaminated soil through high-pressure rotary spraying process by mixture of PS and activators. The high-density electrical resistivity tomography (ERT) technique was employed to monitor the distribution of soil resistivity during the rotary jet process, enabling an analysis of the migration and transformation patterns of the oxidation agents during the remediation process. Additionally, the remediation effects of the 4 agent groups were compared after a 48-hour jet period.The experimental results demonstrated that ERT accurately reflected the locations of pollution remediation, with a maximum deviation of less than 0.5m. The changes in resistivity showed a positive correlation with naphthalene remediation. However, discrepancies existed between the estimated remediation values obtained from fitting curves and the actual remediation values, with errors ranging from 10.3% to 22.6%. Among the tested reagents, carbon-supported iron powder exhibited excellent stability and sustained release performance, leading to an extension of the stable oxidation stage by approximately 8hours after jet. Ultimately, the predetermined remediation area achieved the highest level of pollutant removal in the following order:BC-nZVI>Fe0[nm]>Fe0[μm]≈NaOH.

Key words： multi-electrode resistivity method (ERT) high pressure rotary jet in-situ oxidation PAHs field test

Received: 23 May 2023

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X53

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	Articles by authors
	LIU Di
	SONG Quan-wei
	LI Ling
	HU Jie
	WANG Ting-jun
	DU Xian-yuan
	DENG Yong-feng
	KE Han

Cite this article:

LIU Di,SONG Quan-wei,LI Ling等. Field study on ERT monitoring high-pressure rotary jet repairing PAHs pollution[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 5933-5943.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I11/5933

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