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《Journal of Anhui Agricultural Sciences》 2009-04
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Influence of K_2SO_4 and KH_2PO_4 on Adsorption of Copper in Calcareous Soils and Acid Soil

CHEN Miao-miao et al(College of Resource and Environment Science,Agricultural University of Hebei,Baoding,Hebei 071001)  
[Objective]The purpose was to study the effect of different electrolyte concentration and pH value on adsorbing copper of soil.[Method]Cu2+ adsorption isotherms and the influence of electrolytes on the adsorption and sequential sorption of Cu2+ in meadow cinnamon soil and red soil were investigated.[Result]The results showed that low concentration of K2SO4 slightly promoted Cu2+ adsorption in meadow cinnamon soil,the higher concentration of KH2PO4 promoted Cu2+ adsorption.The amount of Cu adsorption on red soil varied in the peak-shape-like curves with the concentration of the two kinds of electrolytes.The sequential adsorption of Cu in meadow cinnamon soil slightly increased and decreased with rising concentration of K2SO4 and KH2PO4,respectively.Lower concentration of K2SO4 promoted sequential adsorption of Cu2+ in red soil.Cu2+ sequential adsorption in red soil also increased with increasing concentration of KH2PO4.The increment of Cu2+ sequential adsorption in the presence of K2SO4 and KH2PO4 was much higher than that of Cu2+ adsorption in red soil.Moreover,the promotion of KH2PO4 to Cu2+ adsorption in red soil was stronger than that of K2SO4.The influence of K2SO4 on Cu2+ sequential adsorption and Cu2+ adsorption in meadow cinnamon soil was similar.[Conclusion]This research will provide the scientific basis for control copper pollution in soil.
【Fund】: 河北省自然基金(D2004000390)
【CateGory Index】: S143
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