Humic Acid Transport in Water-Saturated Porous Media

被引：19

作者：

Wei, Xiaorong ^{[1
,2
,3
]}

Shao, Mingan ^{[1
,2
,3
]}

Horton, Robert ^{[4
]}

Han, Xinning ^{[5
]}

机构：

[1] Chinese Acad Sci, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi Prov, Peoples R China

[2] MWR, Yangling 712100, Shaanxi Prov, Peoples R China

[3] NW A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi Prov, Peoples R China

[4] Iowa State Univ, Dept Agron, Ames, IA 50011 USA

[5] Ningxia Teachers Univ, Ningxia 756000, Peoples R China

来源：

ENVIRONMENTAL MODELING & ASSESSMENT | 2010年 / 15卷 / 01期

基金：

中国科学院西部之光基金;

关键词：

Humic acid transport; Porous media; Solution pH; Ionic strength; Flow rate; DISSOLVED ORGANIC-MATTER; MINERAL PARTICLES; ION-BINDING; ADSORPTION; SUBSTANCES; SOIL; PH; COMPLEXATION; DIFFUSION; SORPTION;

D O I：

10.1007/s10666-008-9186-y

中图分类号：

X [环境科学、安全科学];

学科分类号：

083001 [环境科学];

摘要：

The presence of humic acid (HA) in water poses environmental problems because it enhances the transport of several contaminants. A series of column experiments was conducted toward studying HA transport in different porous media under various pH, ionic strength, and flow rate conditions. The results showed that decreasing pH and increasing ionic strength increased adsorption and therefore delayed the transport of HA in porous media. However, increasing flow rate accelerated the transport of HA in porous media. The effects of pH, ionic strength, and flow rate varied with the solid matrix and were more evident in sands of smaller average particle diameter than in those with larger ones. These factors must be considered when predicting the environmental fate of HA. The results also suggested that HA adsorption was an important process controlling HA transport and should be considered in studies of HA behavior in porous media.

引用

页码：53 / 63

页数：11

共 38 条

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