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Influence of Water Saturation on Adsorption Behavior at Liquid-Liquid Interfaces in Unsaturated Porous Media
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作者:

Zhu, Yan
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机构:
Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China

Cui, Ziteng
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China Water Investment Co LTD, Beijing 100053, Peoples R China Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China

Li, Kun
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Shandong Water Transfer Operat & Maintenance Ctr, Jinan 234000, Peoples R China Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China

Wang, Chaoqi
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Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China

Li, Zhao
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Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China

Zhang, Xueyi
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Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China

Dou, Zhi
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Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China
机构:
[1] Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China
[2] China Water Investment Co LTD, Beijing 100053, Peoples R China
[3] Shandong Water Transfer Operat & Maintenance Ctr, Jinan 234000, Peoples R China
来源:
基金:
中国国家自然科学基金;
关键词:
SOLUTE TRANSPORT;
MODEL;
D O I:
10.1155/2023/8155349
中图分类号:
P3 [地球物理学];
P59 [地球化学];
学科分类号:
0708 ;
070902 ;
摘要:
Adsorption reaction in unsaturated porous media is of great importance for soil and groundwater remediation. In this study, the influence of the Peclet number (Pe) and water saturation on adsorption behavior at liquid-liquid interfaces was quantitatively investigated. The pore-scale reactive transport in unsaturated porous media was directly simulated. The Navier-Stokes equations, the surface transfer and adsorption reaction equations, and the advection-diffusion equation (ADE) were coupled to obtain the flow and concentration fields. The results showed that water saturation had a significant influence on the complexity of the flow field. A nonmonotonic relationship was found between water saturation and the uniformity of the flow field. Peclet number had little influence on the maximum adsorption. On the other hand, the adsorption time showed a nearly linear relationship with the Peclet number and increased with increasing Peclet number. Additionally, a nonlinear relationship was found between water saturation and the maximum adsorption. As water saturation increased, the maximum adsorption tended to increase to a peak and then decrease. The peak of the maximum adsorption occurred at Pe=5, Sw=0.458, and the shortest adsorption time was observed at Sw=0.902. However, the difference in adsorption times for saturations of 0.458 and 0.698 was not significant and was only about 20 PV difference.
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