| 估算天津环境中γ-HCH归宿的逸度模型 |
| 摘要点击 1225 全文点击 1276 投稿时间：2002-04-24 修订日期：2002-06-21 |
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| 中文关键词 γ-HCH 逸度模型 多介质模型 通量 |
| 英文关键词 HCH fugacity model multimedia model transfer flux |
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| 中文摘要 |
| 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1.57×10-11、7.95×10-7、1.17 × 10-4、4.58×10-4、6.03×10-4、1.60×10-4和6.42×10-5mol/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. |
| 英文摘要 |
| 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/m3 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. |
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