表面活性剂在不同介质粒径含水层中的迁移行为

姚猛; 陈旭阳; 袁迁; 薛金娟; 王明新

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中国环境科学 ›› 2023, Vol. 43 ›› Issue (10) : 5247-5256.

水污染与控制

表面活性剂在不同介质粒径含水层中的迁移行为

姚猛^1,2, 陈旭阳¹, 袁迁¹, 薛金娟¹, 王明新^1,2

作者信息 +

Migration behavior of the surfactant in aquifers with different medium sizes

YAO Meng^1,2, CHEN Xu-yang¹, YUAN Qian¹, XUE Jin-juan¹, WANG Ming-xin^1,2

Author information +

文章历史 +

摘要

基于表面活性剂强化空气扰动（SEAS）修复中表面活性剂注入参数仅能依靠有限的场地经验，利用光透射可视化技术，研究了表面活性剂在不同介质粒径含水层中的迁移行为.结果表明：不同介质岩性含水层表面活性剂注入过程影响半径呈对数增加，其影响面积呈线性增加，且其迁移行为明显受到注入浓度的影响，存在临界注入浓度（C_i），当其<C_i时，向上迁移；而当其≥C_i时，向下迁移.在C_i附近，其迁移速率最低，而越远离C_i，迁移速率越大.另外，在砾石和粗砂含水层中，其迁移过程主要受到浮力和重力作用；而在中砂含水层中，其迁移主要受到吸附作用，且其迁移幅度很小.上述研究有利于SEAS修复中表面活性剂注入参数的精准设计，提高污染物的去除率.

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.

导出引用

姚猛, 陈旭阳, 袁迁, 薛金娟, 王明新. 表面活性剂在不同介质粒径含水层中的迁移行为[J]. 中国环境科学. 2023, 43(10): 5247-5256

YAO Meng, CHEN Xu-yang, YUAN Qian, XUE Jin-juan, WANG Ming-xin. Migration behavior of the surfactant in aquifers with different medium sizes[J]. China Environmental Science. 2023, 43(10): 5247-5256

中图分类号： X523

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