This work was conducted to study the leaching characteristics and release kinetics of heavy metals copper(Cu),lead(Pb) and cadmium(Cd) in polluted purple soil through column experiment.The results manifested that,the release mechanism of heavy metals in purple soil appeared to be consisted of two phases involving the initial rapid process(leachate less than 2 000 ml) followed by a slow continuous process.In rapid process,the concentrations of heavy metals in leachate were comparatively higher,and the releas...