The experimental results illustrate that " particle - concentration effects " for trace metals reported in literature are mainly due to the particle dynamics in the estuary . 4 . the adsorption percentage ratios of adsorptions and partitioning coefficients for trace metals in the changjiang estuary decease significantly with higher concentrations of elements 这一模拟研究结果说明,通常文献报道的在河口混合区某些情况下的微量金属固-液分配的所谓“颗粒物浓度效应”主要与河口现场泥沙颗粒的物理动力学过程有关。