黄河包头段环境中α-HCH的迁移与残留的动态模拟

以黄河包头段作为研究区域,α-HCH作为研究对象,利用稳态假设的逸度方法,建立符合包头段污染特征的微分方程组,利用MATLAB 6.5求出该方程的稳态解和随时间变化的微分解,模拟出环境各相中稳态时各种迁移过程的年迁移量,得出年迁移量大小顺序:水体>悬浮颗粒物>沉积物>大气;该段的α-HCH主要迁移来源为水体迁移和悬浮物迁移,迁移量分别为1.68t/a和1.34t/a;稳态时α-HCH在河流环境中的残留以沉积物为最多,其残留量达38.56kg,与实测结果数量级相吻合,且在沉积物中达到稳态的时间也是最长的,约为53年。

Simulation of the Transfer and Fate of α - HCH in the Baotou Section of the Yellow River

It takes the Baotou Section of the Yellow River as a study area,and α-HCH as the object of study,and using fugacity model it is Supposed that the environment is steady now,to establish a differential equations,then using MATLAB 6.5 to find the steady solution of this equation,and when the environment is steady,the transfer capacity will be known from calculating the differential equations,in various phases of the transfer process all the year.then we known the Sequence of the size of transfer capacity in various phases of the transfer process is "Water,Suspensions,Sediment and Atmosphere".In this area the α-HCH mainly come from water transfer and Suspensions transfer,both the transfer capacity are 1.68t/a and 1.34t/a;when the environment is steady,the residue of α-HCH is most in the sediment than other environment media,it is about 38.56 kg,and in the sediment the time to reach steady is the longest too.