基于压力梯度控制的VOC污染的低透性土壤的空气散热修复
Long Xu1, Huimin Zhu1, Fusheng Zha1
1School of Resource and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
Chemosphere
|July 26, 2023
概括
压力梯度增强空气散射 (PGEAS) 通过创建受控的压力梯度来改善土壤修复. 与传统方法相比,这种新的方法提高了污染物的去除能力,并减少了低透性土壤中的残留物.
科学领域:
- 环境工程 环境工程
- 地质技术工程 地质技术工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 传统的空气散射 (AS) 对挥发性有机化合物 (VOC) 污染的低透性土壤是无效的.
- 改善空气流和污染物去除在造过程中对于有效的土壤整治至关重要.
研究的目的:
- 引入和评估一种新的压力梯度增强空气散射 (PGEAS) 方法,用于VOC污染土壤的整治.
- 调查PGEAS的整治效率,质量转移特性和潜在机制.
主要方法:
- 通过控制土壤中的压力梯度来实施PGEAS.
- 测量孔隙压力和液体和度,以确认梯度形成和排水行为.
- 在二维尺度上分析废气和土壤中的污染物度.
主要成果:
- PGEAS显著加快了气态污染物的排放速度,并减少了残留的土壤污染.
- 确定了一个临界压差值,在此值以上,VOC去除和质量转移显著增强.
- 与传统的AS相比,PGEAS方法证明了改善的整治范围和面积.
结论:
- PGEAS提供了一种优越的方法,用于修复受VOC污染的低透性土壤.
- 大规模空气子通道的形成,由孔隙压力和排水证实,是PGEAS有效性的关键.
- 这些发现对于在异质土壤条件下的污染物清除策略具有高度相关性.
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