黄河头道拐冰封期α-HCH逸度模型的建立与验证

Fate simulation and model verification of α-HCH during the icebound season at the Toudaoguai of the Yellow River in Inner Mongolia by Fugacity Model

在稳态假设下,利用LevelⅢ环境多介质逸度模型模拟预测了黄河头道拐冰封期α-HCH在大气、冰、水、悬浮物、底泥相中的浓度分布,同时与实测值进行对比,验证了模型的有效性和可靠性,并根据模拟结果计算了相间迁移通量和相内降解量。结果表明:α-HCH在大气中的浓度最小,在底泥中的浓度最大,底泥是α-HCH的"汇";各相间的迁移通量以气相向冰相的迁移通量为最大;随冰相光降解是α-HCH从研究区域环境介质中消失的主要途径。

The Level Ⅲ Multimedia Environmental Fugacity Models（ MEFM） was used to simulate the concentration distribution of α- HCH in the air,ice,water,suspended solid and sediment during the icebound season at the Toudaoguai of the Yellow River in Inner Mongolia under a steady- state assumption. By comparing with the measured values,and according to the simulation results,the reliability and the availability of the model were verified.The transferring or exchanging fluxes between the phases and the degradation of fluxes in the phases were calculated. By using MEFM,it was shown that the sediment achieved the highest concentrations in contrast to air,ice,water,suspended solid,sediment,while the concentration of α- HCH in the air were the lowest. The transferring flux of the gas to the ice was maximum,while the degradation in ice was the main loss in the system.