将分离效应纳入非离子表面活性剂的非水相液体溶解模型
Lili Huo1, Guansheng Liu2, Junyi Wang2
1School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan, Hubei 430072, China.
The Science of the total environment
|January 31, 2025
概括
预测非离子表面活性剂的非水相液体 (NAPL) 恢复效率需要了解散装分离动力学. 这项研究揭示了表面活性剂分离如何影响NAPL溶解,提高预测准确度.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 物理化学 物理化学
背景情况:
- 表面活性剂增强回收对于修复非水相液体 (NAPL) 污染至关重要.
- 准确预测NAPL溶解动力学对于有效的补救策略至关重要,特别是在使用非离子表面活性剂时.
- 了解批量分区对表面活性剂行为的影响是改善这些预测的关键.
研究的目的:
- 研究表面活性剂从水相分离到液体NAPL的动力学.
- 为了确定这种分区对多德溶解动学的影响,一个模型NAPL.
- 改进模型,以预测非离子表面活性剂的NAPL溶解效率,考虑散装分区效应.
主要方法:
- 使用阳离子 (脂,SDBS) 和非阳离子 (TX-100) 表面活性剂研究了多德干的溶解动力学.
- 应用了第一阶质量转移模型和双薄膜模型来分析表面活性剂分离和NAPL溶解.
- 修改了第一阶质量转移模型,将可变平衡溶解度纳入其中,以考虑散装分离损失.
主要成果:
- 阳离子表面活性剂 (RL,SDBS) 显示溶解度紧密遵循具有恒定溶解度的第一阶质量转移模型.
- 非离子表面活性剂 (TX-100) 的溶解率因逐渐分裂为散装NAPL而显著偏离.
- 第一阶质量转移模型准确地描述了TX-100散装分区损失,模型准确性随着可变平衡溶解度的提高而得到改善.
结论:
- 大量分离显著影响NAPL溶解中的非离子表面活性剂性能.
- 在质量转移模型中调整平衡溶解度可以提高非离子表面活性剂的预测精度.
- 这项研究为NAPL溶解机制提供了关键的见解,改善了表面活性剂增强修复技术的设计.
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