表面活性剂在不同介质粒径含水层中的迁移行为

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Abstract Based on the limited site experience of the surfactant injection parameters during surfactant-enhanced air sparging (SEAS), the migration behavior of the surfactant in aquifers with different medium sizes was studied by light transmission visualization technology. The results showed that the influence radius of the surfactant injection in the aquifers with different medium sizes increased logarithmically, and its influence area increased linearly, and its migration behavior was obviously affected by the SDBS injection concentration. There was a critical injection concentration (C_i), which migrated upward when it was less than the C_i. When it was greater than or equal to the C_i, it migrated downward. When it was close to the C_i, its migration rate was the lowest, while the further away from the C_i, the greater the migration rate. In addition, in gravel and coarse sand aquifers, the migration process was mainly affected by the buoyancy and gravity effect. However, in the medium aquifer, its migration was mainly affected by the adsorption effect, and its migration range was small. The above research is beneficial for the precise design of the surfactant injection parameters to improve the contaminant removal efficiency during SEAS remediation.

Key words： surfactant air sparging medium size migration behavior

Received: 07 March 2023

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X523

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	Articles by authors
	YAO Meng
	CHEN Xu-yang
	YUAN Qian
	XUE Jin-juan
	WANG Ming-xin

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YAO Meng,CHEN Xu-yang,YUAN Qian等. Migration behavior of the surfactant in aquifers with different medium sizes[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5247-5256.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I10/5247

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