| Title: | Numerical simulation of pollutant transport in soils surrounding subway infrastructure |
| Author(s): | Zhou C; Liu C; Liang J; Wang S; |
| Address: | "Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, People's Republic of China. zhoucuihong@bipt.edu.cn. Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, People's Republic of China. College of Chemical Engineering, China University of Petroleum-Beijing, Beijing, 102249, People's Republic of China. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-017-0968-0 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "With continued urbanization, public transport infrastructure, e.g., subways, is expected to be built in historically industrial areas. To minimize the transfer of volatile organic compounds and metalloids like arsenic from industrial areas into subway environments and reduce their impact on public health, the transport of pollutants in soil was simulated in this study. During numerical simulations of a contaminated site, the pollutant (arsenic) was transported from layers of higher to lower concentration, and concentration changes were particularly evident in the early simulation stages. The pollutant was transported in soil along the direction of groundwater flow and spread from the center to the periphery of the contaminated zone without inputs from pollution sources. After approximately 400 days, the concentration of all layers became uniform, with slow decreases occurring over time. The pollutant supply rate had a major influence on the pollutant diffusion distance. When other conditions were kept constant, higher supply rates resulted in longer diffusion distances. The simulation results show that a diaphragm wall of a certain depth can effectively control the diffusion of pollutants in soil. These results can be used to improve environmental assessments and remediation efforts and inform engineering decisions during the construction of urban infrastructure at sites affected by historical pollution" |
| Keywords: | "Arsenic/*analysis Beijing Groundwater Models, Theoretical *Railroads Soil/*chemistry Soil Pollutants/*analysis Water Movements Diaphragm wall Modeling Numerical simulation Orthogonal experiment Pollutant transport Transportation infrastructure;" |
| Notes: | "MedlineZhou, Cuihong Liu, Chengqing Liang, Jiahao Wang, Shihan eng PHR201107213/Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality/ Germany 2017/12/23 Environ Sci Pollut Res Int. 2018 Mar; 25(7):6859-6869. doi: 10.1007/s11356-017-0968-0. Epub 2017 Dec 21" |
