Vertical Distribution and Ecological Risk Evaluation of Heavy Metals in West-branch-way of Yalu River Estuary

摘要

After gathering Core YLJ-40, we studied the ~(210)Pb radioactivity of sediments and evolution characteristics of As, Hg, Cr, Ni, Zn, Pb, Cd, Cu in the heavy metals. The results shows that the heavy metals pollution in Yalu River estuary except Cu takes on ascend trend year after year;;heavy metals distribution presents segmentation characteristics and most of heavy metals came from the pollutants of industry and agriculture, while Cu originates from the mining pollution. The evaluating results based on the different evaluation background value are not exactly the same. But it has been an indisputable fact that the heavy metals pollution is becoming more serious in Yalu River estuary.