Petroleum Hydrocarbon Transport through Saturated-unsaturated Media :A Numerical Model and Practice

• 作者: Fu Jianfang Miao Tao Wu Keqin
• 来源期刊: 气象与环境研究:英文版
• 学科: 地球科学
• 关键词: Total petroleum hydrocarbons Contaminated SITE SATURATED-UNSATURATED MEDIA FINITE element analysis
• 年，卷（期）: 2019,（3）
• 页码范围: 69-73
• 页数: 5页
• 分类号: P

摘要

The mathematical model of migration of total petroleum hydrocarbons in unsaturated media was described,including convection,molecular diffusion,mechanical dispersion and adsorption,and chemical reactions.By finite element method,a numerical model of evaluating petroleum hydrocarbon migration through contaminated soils was created and applied to the environmental investigations of a relocated mechanical factory in Shanghai.The model consisted of three compacted soil layers:plain fill,sandy silt and silty clay.The results showed that pollutants in the sandy silt traveled faster than that in the plain fill and silty clay.The same decreasing trend of migration velocity was observed in all of the three soil layers.After 180 d,the concentrations of pollutants in the sandy silt can be as low as 40% of the original maximum,while its counterpart in the silty clay is 64%.