【摘要】 对合成针铁矿吸附磷酸根后表面电化学性质的变化及其对锌次级吸附的研究结果表明，针铁矿吸附磷后，其电荷零点（ＰＺＣ）和表面电位（ψ０）下降，下降幅度随吸附磷量的提高而加大；ｐＨ５．５０条件下，吸附磷量大于１１０ ｍｍｏｌ·ｋｇ^－１时，表面电位符号发生逆转，由正变负．随着针铁矿吸附磷量的提高，针铁矿对锌的吸附容量和吸附能力相应增大；“Ｓ”型 Ｚｎ－ｐＨ等温线明显地向低ｐＨ段漂移；针铁矿吸附同量锌时所需体系ｐＨ降低；相同ｐＨ条件下锌吸附量明显增大．文中讨论了磷吸附后增加针铁矿对锌次级吸附的可能机制．更多还原

【Abstract】 A study was conducted on the surface changes of the electro-chemical properties of the synthesized geothite after phosphate adsorption and the secondary adsorption of zinc on the surfaces. The results show that the adsorption of phosphate decreases the PZC and surface potential（ψ0）of the goethite,and the decreased range rises with the increase of the phosphate adsorption.At ambient pH5.50,when phosphate adsorption is more than 110 mmol·kg^-1,the sign of the surface potential reverses to negative. With the increase of phosphate adsorption, the capacity and strength of zinc adsorption on phosphate-goethite rise correspondingly; the S-shaped Zn-pH isotherms shift toward lower pH and the lower pH value is needed for the same amount of zinc adsorption on phosphate-goethite.with the same pH value,the adsorption of zinc increases significantly. The possible mechanisms of the enhanced zinc adsorption on poethite after phosphate adsorption are also discussed in the paper.更多还原