【摘要】 以全天津市为研究区域 ,利用稳态假设的逸度模型 ,用Matlab软件计算了γ HCH(林丹 )在环境各相中的浓度和相间迁移通量 .γ HCH在天津气、水、土壤、沉积物、鱼、作物、蔬菜各相中的浓度分别为 1 5 7× 1 0 - 11、7 95×1 0 - 7、1 1 7× 1 0 - 4、4 5 8× 1 0 - 4、6 0 3× 1 0 - 4、1 60× 1 0 - 4和 6 42× 1 0 - 5mol/m3,在数量级上与实测值吻合很好 .估算结果表明农业施用和农药厂废水是该地区环境中γ HCH最主要的来源 ,最大的汇是土壤和沉积相 (占环境中总量的 99%) ,最主要的迁移过程是水 沉、气 土的扩散和沉降 ,土壤和沉积物中的降解是γ HCH消失的最主要途径 .更多还原

【Abstract】 This study taking Tianjin as the study area calculated the concentration and transfer flux of γ HCH in all bulks using Matlab based on the assumption of steady state fugacity model. The calculated values agree well with the observed values, the concentrations of γ HCH in air, water, soil, sediment, fish, crop, and vegetable were 1 57×10 -11 , 7 95×10 -7 ,1 17×10 -4 , 4 58×10 -4 , 6 03×10 -4 , 1 60×10 -4 , 6 42×10 -5 mol/m 3 respectively. The result indicated that the main source of γ HCH was agricultural application and wastewater from pesticide industries, the biggest bulk sinks were soil and sediment (accounting for 99% of total amount in the environment). Among all transfer processes deposition and diffusion on the water sediment and air soil interface were the primary, and mineralization was the key route for γ HCH to disappear in the environment.更多还原