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基于H₂O₂的TCE修复的孔尺度优化,使用稳定剂增强氧化剂输送和后续注射水

Bowen Wang¹, Sotheavuth Sin¹, Wilson Susanto¹

¹Department of Mechanical Engineering, Institute of Science Tokyo, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.

Journal of contaminant hydrology

|January 29, 2026

概括

在地化氧化 (ISCO) 优化用于地下水整治涉及水注入和化学稳定的结合. 这种双重方法增强了氧化剂的传递,并显著提高了三乙烯去除效率.

科学领域:

环境科学环境科学
地质化学地质化学
化学工程是化学工程的重要组成部分.

背景情况:

基于过氧化 (H2O2) 的现场化学氧化 (ISCO) 对于像三乙烯 (TCE) 这样的密集非水相液体 (DNAPLs) 的地下水整治至关重要.
修复效率通常受到H2O2自我分解和气体阻塞的限制,限制氧化剂进入污染物.
需要有效的战略来克服这些局限性,并加强污染物清除.

研究的目的:

研究和比较基于H2O2的ISCO三种优化策略的有效性:后续注水,化学稳定和分阶段氧化剂注入.
阐明这些策略影响污染物和气相演变的孔尺度机制.
确定最佳的策略组合,以加强TCE整治.

主要方法:

对三个优化策略的实验研究:后续注入水,化学稳定和分阶段的氧化剂注入.
使用时间解析的3D微型计算机断层扫描 (3D微型CT) 可视化孔尺度修复过程.
在多孔介质中量化TCE和气相的空间和时间演变.

主要成果:

随后注水和化学稳定的联合策略在5重%的H2O2条件下显著增强了TCE整治.
最优的综合策略实现了最高的TCE去除率78.7%.
提供了直接的机械证据,证明物理和化学措施如何共同增强氧化剂的传递.

结论:

将后续注水与化学稳定相结合,是一种高效的方法,可以改善TCE污染地下水的基于H2O2的ISCO.
孔尺度的洞察力突出了管理氧化剂输送的重要性,并在整治设计中考虑气-液-DNAPL相互作用.
优化氧化剂管理和注入策略对于成功的现场地下水整治至关重要.

关键词:

地下水的整治,就是地下水的整治.阶段重新动员的阶段.孔尺度可视化可视化孔尺度可视化稳定剂稳定剂稳定剂在TCE TCE TCE中.

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