Taking loess,humic acid and heavy metal ions as the research objects,based on the adsorption experiment,the adsorption law of loess on humic acid and Cu2+,Zn2+,Pb2+ and Cd2+ was studied.The results indicate that the removal rate of various pollutants by loess increases significantly with the increase of solid-liquid ratio,solution pH,initial concentration reduction,and prolongation of adsorption time,and the impact on the adsorption efficiency of different pollutants is also different;however,the adsorption capacity of loess for heavy metal ions has always been maintained at Pb2+＞Cu2+＞Cd2+＞Zn2+.
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