港口多介质环境中铅和镉的迁移行为及模型研究

Transport Process of Lead and Cadmium in Multimedia Environment of Tianjin Port and Its Model

本次研究应用水生微宇宙模拟了铅和镉在天津港水生生态系统中的归趋,并根据多介质逸度模型的基本原理,探索了铅和镉内在的迁移规律。模型的计算结果与实验数据能够很好地吻合,说明逸度模型的适用性。由模型可知,系统中的镉大约有61%保留在沉积物中,剩下的基本被平流迁移带走,而铅却有99%保留在沉积物中,说明沉降是铅和镉在水环境中主要的迁移过程,尤其是铅。

In this paper,aquatic microcosm is used to simulate the chemical fate of lead and cadmium in Tianjin port,and the internal transportation law is explored by using the fugacity-based multimedia environmental mathematical model. The results of model and experiment are consistent,showing that this model is applicability. The results of model suggest that 61% of the cadmium in the system is kept in sediment,others flow out along with water,and 99% of the lead in the system is kept in sediment,showing that for cadmium and lead,settling is the main transport process in aquatic environment,especially for lead.