表面活性剂强化原位空气扰动修复实验研究——影响区域及气流分布变化规律

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Abstract

An improved two-dimensional visualization device was used to study the zone of influence (ZOI) and the airflow distribution when the surfactant (SDBS) was added to the aquifer. The experimental results indicated that the addition of surfactant would increase the sparging pressure in the same media under the same airflow rate. The addition of surfactant greatly improved the air saturation, however, the mechanism was different under different medium. When airflow rate was 1000L/h, the sparging area of coarse sand (channel flow) and gravel (bubbly flow) increased 21.8% and 5.2% respectively by adding the surfactant to the aquifer. This showed that the smaller medium size was, the more obvious sprging area increased. Under same airflow rate, the airflow distribution range of coarse media became larger and the airflow distribution curve was relatively flat gently, while the airflow distribution range of gravel media was little changed and the airflow distribution curve was relatively abrupt when SDBS was added in the aquifer. Under different airflow rate, the airflow distribution showed significantly similar rule within the ZOI.

Key words： air sparging surfactant the zone of influence (ZOI) airflow distribution

Received: 11 December 2017

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	Articles by authors
	CHANG Yue-hua
	YAO Meng
	ZHAO Yong-sheng

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CHANG Yue-hua,YAO Meng,ZHAO Yong-sheng. Laboratory study of surfactant-enhanced air sparging remediation-The variation rule of the influence of zone and airflow distribution[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(7): 2585-2592.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I7/2585

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