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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．
The changes of electrochemical properties of the surface of the goethite after phosphate adsorption and its secondary adsorption on zinc show that after the adsorption of phosphorus, the zero point (PZC) and the surface potential (ψ0) of the goethite decrease, the decreasing amplitude With the increase of the amount of adsorbed phosphorus, the surface potential sign reverses from positive to negative when the amount of phosphorus adsorbed is more than 110 mmol · kg -1 at pH5.50. With the increase of the amount of adsorbed phosphorus in goethite, the adsorption capacity and adsorption capacity of goethite increased accordingly. The “S” Zn-pH isotherm obviously drifted to the low pH range. Goethite adsorbed the same amount of zinc When required system pH decreased; the same pH conditions significantly increased zinc adsorption. The possible mechanism of secondary adsorption of zinc on goethite after phosphorus adsorption is discussed in this paper.