摘要
Researchers are paying more and more attention to the adsorption and transport of heavy metals in soil. In this study, laboratory experiments were performed to investigate the characteristics of adsorption and transport of mercury in soils of different locations in the western suburb of Beijing. To characterize the adsorption mechanism of mercury in soil, adsorption isotherms were determined through a batch experiment. Soil column experiments were performed in saturated soil under steady-state flow at a specific water head. The breakthrough curves (BTC) for the tracer (bromine) and mercury were obtained after continuous input. Moreover, two solute transport models [convection-dispersion equation model (CDE) and two-site non-equilibrium model (TSN)] were used to simulate heavy metal movement in soil on a laboratory column scale. According to the simulating results, we explored which model is more adapted to simulate the movement of heavy metals in saturated soil in the western suburb of Beijing.
Researchers are paying more and more attention to the adsorption and transport of heavy metals in soil. In this study, laboratory experiments were performed to investigate the characteristics of adsorption and transport of mercury in soils of different locations in the western suburb of Beijing. To characterize the adsorption mechanism of mercury in soil, adsorption isotherms were determined through a batch experiment. Soil column experiments were performed in saturated soil under steady-state flow at a specific water head. The breakthrough curves （BTC） for the tracer （bromine） and mercury were obtained after continuous input. Moreover, two solute transport models [ convection-dispersion equation model （CDE） and two-site non-equilibrium model （TSN） ] were used to simulate heavy metal movement in soil on a laboratory column scale. According to the simulating results, we explored which model is more adapted to simulate the movement of heavy metals in saturated soil in the western suburb of Beijing.
基金
This study is granted by the Foundation for the Social Service of Minis-try of Science and Technology (2001DIA10021). And also is granted byChina Ministry of Science and Technology under the program of"Ecologi-cal and Environmental Monitoring, Forcasting and Management System inMining Area"(No. 2004DIB3J110) and"Development and Experimentof Ecological and Environmental Monitoring and Forcasting Technology forMining Area"(No. 2005BA901A03).
关键词
重金属
北京
吸附作用
环境污染
土壤污染
heavy metal
pore-water velocity
retardation factor
two-site non-equilibrium model
