Analysis of the LNAPL Migration Process in the Vadose Zone under Two Different Media Conditions

This study focused on the processes of free infiltration, precipitation displacement, and natural attenuation of the LNAPL under the condition of near-surface leakage. Sandbox experiments were performed to explore the migration characteristics of LNAPL in the vadose zone with two media structures an...

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Autores principales:	Rui Zuo, Xiao Zhao, Jie Yang, Minghao Pan, Zhenkun Xue, Xiang Gao, Jinsheng Wang, Yanguo Teng
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	LNAPL transport vadose zone petroleum hydrocarbon pollutants groundwater Medicine R
Acceso en línea:	https://doaj.org/article/bad0fe6dd86d40a8b125103a7f60dc57
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spelling	oai:doaj.org-article:bad0fe6dd86d40a8b125103a7f60dc572021-11-11T16:13:20ZAnalysis of the LNAPL Migration Process in the Vadose Zone under Two Different Media Conditions10.3390/ijerph1821110731660-46011661-7827https://doaj.org/article/bad0fe6dd86d40a8b125103a7f60dc572021-10-01T00:00:00Zhttps://www.mdpi.com/1660-4601/18/21/11073https://doaj.org/toc/1661-7827https://doaj.org/toc/1660-4601This study focused on the processes of free infiltration, precipitation displacement, and natural attenuation of the LNAPL under the condition of near-surface leakage. Sandbox experiments were performed to explore the migration characteristics of LNAPL in the vadose zone with two media structures and the influences of the soil interface on the migration of LNAPL. The results indicate that the vertical migration velocity of the LNAPL infiltration front in medium and coarse sand was 1 order of magnitude higher than that in fine sand and that the LNAPL accumulated at the coarse–fine interface, which acted as the capillary barrier. Displacement of precipitation for LNAPL had little relationship with rainfall intensity and was obviously affected by medium particle size, where coarse sand (40.78%) > medium sand (20.5%) > fine sand (10%). The natural attenuation rate of the LNAPL in the vadose zone was related to the water content of the media; the natural attenuation rate of fine sand was higher. This study simulated the process of the LNAPL leakage from the near surface into the layered heterogeneous stratum, improved the understanding of the migration of the LNAPL under different stratum conditions, and can provide support for the treatment of LNAPL leakage events in the actual site.Rui ZuoXiao ZhaoJie YangMinghao PanZhenkun XueXiang GaoJinsheng WangYanguo TengMDPI AGarticleLNAPLtransportvadose zonepetroleum hydrocarbon pollutantsgroundwaterMedicineRENInternational Journal of Environmental Research and Public Health, Vol 18, Iss 11073, p 11073 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	LNAPL transport vadose zone petroleum hydrocarbon pollutants groundwater Medicine R
spellingShingle	LNAPL transport vadose zone petroleum hydrocarbon pollutants groundwater Medicine R Rui Zuo Xiao Zhao Jie Yang Minghao Pan Zhenkun Xue Xiang Gao Jinsheng Wang Yanguo Teng Analysis of the LNAPL Migration Process in the Vadose Zone under Two Different Media Conditions
description	This study focused on the processes of free infiltration, precipitation displacement, and natural attenuation of the LNAPL under the condition of near-surface leakage. Sandbox experiments were performed to explore the migration characteristics of LNAPL in the vadose zone with two media structures and the influences of the soil interface on the migration of LNAPL. The results indicate that the vertical migration velocity of the LNAPL infiltration front in medium and coarse sand was 1 order of magnitude higher than that in fine sand and that the LNAPL accumulated at the coarse–fine interface, which acted as the capillary barrier. Displacement of precipitation for LNAPL had little relationship with rainfall intensity and was obviously affected by medium particle size, where coarse sand (40.78%) > medium sand (20.5%) > fine sand (10%). The natural attenuation rate of the LNAPL in the vadose zone was related to the water content of the media; the natural attenuation rate of fine sand was higher. This study simulated the process of the LNAPL leakage from the near surface into the layered heterogeneous stratum, improved the understanding of the migration of the LNAPL under different stratum conditions, and can provide support for the treatment of LNAPL leakage events in the actual site.
format	article
author	Rui Zuo Xiao Zhao Jie Yang Minghao Pan Zhenkun Xue Xiang Gao Jinsheng Wang Yanguo Teng
author_facet	Rui Zuo Xiao Zhao Jie Yang Minghao Pan Zhenkun Xue Xiang Gao Jinsheng Wang Yanguo Teng
author_sort	Rui Zuo
title	Analysis of the LNAPL Migration Process in the Vadose Zone under Two Different Media Conditions
title_short	Analysis of the LNAPL Migration Process in the Vadose Zone under Two Different Media Conditions
title_full	Analysis of the LNAPL Migration Process in the Vadose Zone under Two Different Media Conditions
title_fullStr	Analysis of the LNAPL Migration Process in the Vadose Zone under Two Different Media Conditions
title_full_unstemmed	Analysis of the LNAPL Migration Process in the Vadose Zone under Two Different Media Conditions
title_sort	analysis of the lnapl migration process in the vadose zone under two different media conditions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/bad0fe6dd86d40a8b125103a7f60dc57
work_keys_str_mv	AT ruizuo analysisofthelnaplmigrationprocessinthevadosezoneundertwodifferentmediaconditions AT xiaozhao analysisofthelnaplmigrationprocessinthevadosezoneundertwodifferentmediaconditions AT jieyang analysisofthelnaplmigrationprocessinthevadosezoneundertwodifferentmediaconditions AT minghaopan analysisofthelnaplmigrationprocessinthevadosezoneundertwodifferentmediaconditions AT zhenkunxue analysisofthelnaplmigrationprocessinthevadosezoneundertwodifferentmediaconditions AT xianggao analysisofthelnaplmigrationprocessinthevadosezoneundertwodifferentmediaconditions AT jinshengwang analysisofthelnaplmigrationprocessinthevadosezoneundertwodifferentmediaconditions AT yanguoteng analysisofthelnaplmigrationprocessinthevadosezoneundertwodifferentmediaconditions
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Analysis of the LNAPL Migration Process in the Vadose Zone under Two Different Media Conditions

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