土壤环境下污染物运移问题的数值模拟研究.pdfVIP

4 7 环境 工程 学报 Vol. 4, No. 7 2 0 1 0 7 Chinese Journal ofEnvironmentalEngineering Jul. 2 0 1 0 胡 舸 彭 帅 张胜涛 (, 400030) ,, , ,, , CO SOL, 3, , X53 A 2010 R esearch on num erical sim u lation for tran sm ission of con tam inan ts in soil Hu Ge Peng Shuai Zhang Shengtao (College ofChem istry and Chem icalEngineering, ChongqingUniversity, Chongqing 400044, China) Abs tract In the soilenvironment, thematerial transmissionmechanism significantly affectsthemigration of pollutants. Through analyzing the numericalsolutionsof theproblem ofpollutantmigration, the tmi espace law of the transmission oforganic pollutants in soil can bemastered, which has both theoretical and practical signifi cance. Based on the convectiondiffusion theory, the generalmathematicalmodelof themigration of pollutant in soilwas established; and then the convectiondiffusion questions in various specified initial and boundary condi tionswerenumerically smi ulated usingCO SOL software. Three typicalmodelsofpollution sources emissionwere calculated, which include stably continuous, index change, instantaneous release. The influences of various pa rameters inmodelon calculation resultswere compared, such as diffusion, convection, adsorption and degrada tionparameters. Finally, a correlation analysis and discussionwasmade on calculation results of thepollutantcon centration distribution. K ey w ord s convectiondiffusion equation; pollutants; concentration distribution; numericalsmi ulation , , , 1 ,, , 11 , [ 1, 2] [3, 4] : 211 ( S