M_xO_y·nH_2O表面性质及其对F^-离子吸收作用的研究

Study on the Surface Characters of M_xO_y·nH_2O and Adsorption of Fluoride Ion

用沉淀法制备了 4种高价金属水合氧化物 ,采用电位滴定法分别测定了它们的质子键合等温线及零电荷点 ,在 p H=6 .0～ 7.0的条件下 ,通过静态吸附绘制了 4种水合氧化物对 F-的吸附等温线 ,并由实验分析了水合氧化物表面性质及其对

Al 2O 3·nH 2O,CeO 2·nH 2O,TiO 2·nH 2O and ZrO 2·nH 2O were prepared by the precipitation method.The proton binding isotherms and the point of zero charges(pH PZC )of four kinds of metal hydroxides were measured by the potentionmetric titration method,respectively.The adsorption isotherms of aqueous F -to the hydroxides at pH=6.0~7.0 were obtained in static adsorption experiments.Based on the isotharms,the surface properties and adsorption effects of the hydroxides on aquous F -were discussed.