中华医学超声杂志

应用化学 ›› 1995, Vol. 0 ›› Issue (2): 9-12.

• 研究论文 • 上一篇    下一篇

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(SiW12)的吸附

楚文玲, 叶兴凯, 吴越   

  1. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1994-08-30 修回日期:1994-12-06 出版日期:1995-04-10 发布日期:1995-04-10

Heterogenization of Heteropoly Acids on the Activated Carbon Ⅲ. Adsorption of Dodecatungstosilicic Acid(SiW12)on Adivated Carbons in Acid Medium

Chu Wenling, Ye Xingkai, Wu Yue   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1994-08-30 Revised:1994-12-06 Published:1995-04-10 Online:1995-04-10

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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(SiW12)在不同来源活性炭上的吸附作用.各活性炭对SiW12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.

关键词: 钨硅酸, 吸附, 活性炭, 固载

Abstract: The adsorption of heteropoly acid(HPA)SiW12 of Keggin structure on the acti-vated carbons of different sources has been studied in aqueous solutions of H2SO4, HCl,H3PO4 with H+ concentration of 3mol/L,aq. HAc solution and pure acetic acid. It is foundthat the forms of the adsorption isotherms of SiW12 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.

Key words: dodecatungstosilicic acid, adsorption, activated carbon, heterogenization

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