干旱区生态环境知识资源中心(Arid): A Two-dimensional Analytical Model for Volatile Organic Compound Diffusion Through the Unsaturated Soil and Horizontal Permeable Reactive Barriers

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DOI	10.1007/s11270-024-07211-4
	A Two-dimensional Analytical Model for Volatile Organic Compound Diffusion Through the Unsaturated Soil and Horizontal Permeable Reactive Barriers
	Wang, Shifang; Song, Lei; He, Haijie; Zhang, Wenjie
通讯作者	Song, L
来源期刊	WATER AIR AND SOIL POLLUTION
ISSN	0049-6979
EISSN	1573-2932
出版年	2024
卷号	235 期号:6
英文摘要	Recently, permeable reactive barriers (PRBs) have been installed horizontally, rather than vertically, as an alternative method to target volatile organic compound (VOC) mitigation. In this study, a 2-dimensional (2D) analytical model of VOC diffusion in the unsaturated soil and horizontal PRBs is presented. The analytical model is validated by numerical results. Influences of PRBs' properties (e.g., thickness, adsorption and reactive materials) and environmental factor (e.g., temperature, pH and water content) on the attenuation of VOCs are investigated by the developed analytical solutions. Results demonstrated that the upward diffusion of VOCs is significantly affected by the temperature and PRB's water content. An increase of the temperature from 298 K to 315 K can result in an increase of the VOC concentration by a factor of 1.5. This is because the higher temperature leads to a larger effective diffusivity of VOC, while the oxidation rate increases. As the water saturation of PRB increases, the oxidation rate rises, while the diffusion of VOCs through the barrier slows down. The optimal water saturation of PRB is observed to range from 0.28 to 0.55. To ensure optimal performance of the PRB, it is suggested to constantly observe and control the water content of the PRB, particularly in the warmer months and the arid areas. The results demonstrated that a 0.3 m horizontal PRB can serve as a good barrier for preventing VOC vapors from reaching the buildings and land surface. The developed analytical model may serve as a valuable tool for the design of PRB for VOC mitigation.
英文关键词	Analytical model diffusion model application permeable reactive barrier VOC
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001243780900003
WOS关键词	CHLORINATED SOLVENT VAPORS ; POTASSIUM-PERMANGANATE ; TRICHLOROETHYLENE ; OXIDATION ; GROUNDWATER ; TRANSPORT ; DEGRADATION ; KINETICS ; REMOVAL
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405903
推荐引用方式 GB/T 7714	Wang, Shifang,Song, Lei,He, Haijie,et al. A Two-dimensional Analytical Model for Volatile Organic Compound Diffusion Through the Unsaturated Soil and Horizontal Permeable Reactive Barriers[J],2024,235(6).
APA	Wang, Shifang,Song, Lei,He, Haijie,&Zhang, Wenjie.(2024).A Two-dimensional Analytical Model for Volatile Organic Compound Diffusion Through the Unsaturated Soil and Horizontal Permeable Reactive Barriers.WATER AIR AND SOIL POLLUTION,235(6).
MLA	Wang, Shifang,et al."A Two-dimensional Analytical Model for Volatile Organic Compound Diffusion Through the Unsaturated Soil and Horizontal Permeable Reactive Barriers".WATER AIR AND SOIL POLLUTION 235.6(2024).