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Heavy metal elements in the waters of Yintao River were analyzed quantitatively.Results showing that the migration process of non - particulate heavy metals includes diffusion process and re - suspension process.Fe,Mn,Al and Cr transfer from solution to colloid with the enhanced hydrodynamic,but the Zn has the opposite trend.The complexation and adsorption capacity of organic colloid to the heavy metals depends on the characteristics of the elements.