裂隙介质VOCs赋存迁移特征与场地修复难点

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Abstract This review summarizes experimental methods in this field, assesses migration characteristics of VOCs in fractures, and analyzes mechanisms involved in the remediation of fractured aquifers. Furthermore, implications for contaminated site remediation are proposed. Advection-dispersion, adsorption-desorption and cross-media migration affect the fate of VOCs in fractured aquifers. Both crack clogging by chemical oxidation products and back diffusion of trapped VOCs affect the remediation efficiency, leading to tailing and rebounding of the remedy project in fractured aquifers. Low representativeness of environmental samples, limited mass transfer rate of reagents and substrates, and cross-media transport are the major obstacles hindering fractured aquifer remediation, where future works must spare no effort to overcome.

Key words： fracture VOCs back diffusion mass transfer representativeness

Received: 19 March 2022

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X523

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	WANG Liu-wei
	YANG Xiao-dong
	HOU De-yi

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WANG Liu-wei,YANG Xiao-dong,HOU De-yi. VOCs in fractured aquifers: presence, migration characteristics, and difficulties for contaminated site remediation[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(10): 4780-4789.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I10/4780

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