Mathematical modeling of organic liquid dissolution in heterogeneous source zones

Guo，Zhilin1; Russo，Ann E.2; DiFilippo，Erica L.3; Zhang，Zhihui2; Zheng，Chunmiao1; Brusseau，Mark L.2,3

2020-11-01

10.1016/j.jconhyd.2020.103716

JOURNAL OF CONTAMINANT HYDROLOGY   影响因子和分区

0169-7722

1873-6009

A simple one-dimensional heterogeneous-source model was used to simulate dissolution of organic liquid that was non-uniformly distributed in physically heterogeneous porous media. The permeability field was depicted as a pseudo-homogeneous medium. The source zone was discretized into multiple domains representing different organic-liquid configurations and hydraulic accessibilities, each with a different representative upscaled mass transfer rate coefficient that is temporally variable. This simplified approach represents a system where minimal information is available regarding system heterogeneities. All factors that influence dissolution were incorporated into the calibrated mass transfer terms. The mass transfer terms were calibrated for each zone separately. The one-dimensional, heterogeneous-source model adequately simulated the multi-stage dissolution behavior observed for column-scale systems that were packed with different natural soils, as well as for flow-cell systems wherein the source zone consisted of both a residual zone and pool. The results indicate that the model adequately simulated the presence of multiple organic-liquid zones in porous media with different configurations and hydraulic accessibilities, which accounts for the non-ideal dissolution behavior observed. The calibrated mass transfer terms for each source type were consistent with those obtained for systems that contained only one of either source type.

Heterogeneous-source model Multi-stage mass discharge NAPL dissolution Upscaled models

SCI ; EI

英语

第一 ; 通讯

National Institute of Environmental Health Sciences Superfund Basic Research Program[ES04940] ; National Natural Science Foundation of China[41931292] ; Natural Science Foundation of Guangdong Province (CN)[2020A1515010891]

Environmental Sciences & Ecology ; Geology ; Water Resources

Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources

WOS:000596076400002

ELSEVIER

20203909224486

Porous materials ; Liquids ; Mass transfer

Mass Transfer:641.3 ; Chemical Operations:802.3 ; Materials Science:951

ENVIRONMENT/ECOLOGY

2-s2.0-85091214199

Scopus

1.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Environmental Science,University of Arizona,Tucson,429 Shantz Building,85721,United States
3.Hydrology and Atmospheric Sciences,University of Arizona,Tucson,John W. Harshbarger Building,85721,United States

Guo，Zhilin,Russo，Ann E.,DiFilippo，Erica L.,et al. Mathematical modeling of organic liquid dissolution in heterogeneous source zones[J]. JOURNAL OF CONTAMINANT HYDROLOGY,2020,235.

Guo，Zhilin,Russo，Ann E.,DiFilippo，Erica L.,Zhang，Zhihui,Zheng，Chunmiao,&Brusseau，Mark L..(2020).Mathematical modeling of organic liquid dissolution in heterogeneous source zones.JOURNAL OF CONTAMINANT HYDROLOGY,235.

Guo，Zhilin,et al."Mathematical modeling of organic liquid dissolution in heterogeneous source zones".JOURNAL OF CONTAMINANT HYDROLOGY 235(2020).