杂多酸在活性炭上的固载化Ⅲ．活性炭在酸性介质中对钨硅杂多酸（SiW_（12））的吸附  

Heterogenization of Heteropoly Acids on the Activated Carbon Ⅲ. Adsorption of Dodecatungstosilicic Acid(SiW(12))on Adivated Carbons in Acid Medium

作　　者：楚文玲[1] 叶兴凯[1] 吴越[1] 

机构地区：[1]中国科学院长春应用化学研究所

出　　处：《应用化学》1995年第2期9-12,共4页Chinese Journal of Applied Chemistry

摘　　要：在氢离子浓度均为３ｍｏｌ／Ｌ的硫酸，盐酸，磷酸，醋酸水溶液中和冰醋酸中研究了具有Ｋｅｇｇｉｎ结构的硅钨杂多酸（ＳｉＷ＿（１２））在不同来源活性炭上的吸附作用。各活性炭对ＳｉＷ＿（１２）吸附等温线的形式是不相同的，吸附剂载体的微孔结构以及杂多酸的溶剂化起着重要的作用。并且在无机酸介质中，杂多酸的吸附量比在水溶液中成规律性地增加，且与酸强度成正比关系。在有机酸介质中，吸附作用比较复杂。根据所得结果，提出了在酸性介质中杂多酸在活性炭表面的吸附模型。The adsorption of heteropoly acid(HPA)SiW_(12) of Keggin structure on the acti-vated carbons of different sources has been studied in aqueous solutions of H_2SO_4, HCl,H_3PO_4 with H￣+ concentration of 3mol/L,aq. HAc solution and pure acetic acid. It is foundthat the forms of the adsorption isotherms of SiW_(12) were different and the micropore struc-ture of the adsorbent and solvation of HPA have an important effect on HPA adsorption. Ininorganic acid medium the amount of the adsorbed HPA was higher than it was in water, andthere appeared a proportional relation between adsorptive capacity and acid strength of themedium. In organic acid medium the adsorption was more complex. An adsorption model ofHPAin acid medium is proposed.

关 键 词：钨 硅 吸附 活性炭 固载 杂多酸 

分 类 号：O641.4[理学—物理化学] TQ424.1[理学—化学]