文献类型：期刊文献

英文题名：Powerful adsorption of silver(I) onto thiol-functionalized polysilsesquioxane microspheres

作者：Lu, Xin[1];Yin, Qiangfeng[1];Xin, Zhong[1];Zhang, Zongqian[1]

机构：[1]E China Univ Sci & Technol, Sch Chem Engn, Dept Prod Engn, State Key Lab Chem Engn,UNILAB Chem React Engn, Shanghai 200237, Peoples R China

年份：2010

卷号：65

期号：24

起止页码：6471

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20104613389445);WOS:【SCI-EXPANDED(收录号:WOS:000284061500014)】；

基金：We are thankful for the financial support from the National Natural Science Foundation of China (Project no. 21006025).

语种：英文

外文关键词：Polysilsesquioxane; Condensation; Particle; Adsorption; Silver; Kinetics

摘要：The strong adsorbability of Ag(I) ions onto poly(3-mercaptopropylsilsesquioxane) (PMPSQ) microspheres synthesized through a two-step acid-base catalyzed sol-gel process method was systematically examined. The effect of adsorption time, initial Ag(I) concentration, and solution pH was studied to optimize the Ag(I) adsorbability of PMPSQ microspheres. The PMPSQ microspheres demonstrate a powerful Ag(I) adsorbability with an adsorptivity above 99.99% when the initial Ag(I) concentration is lower than 10 mM and the highest Ag(I) adsorbance of 1140 mg/g at an initial Ag(I) concentration of 150 mM. Adsorption phenomena appeared to follow Langmuir isotherm. The kinetic studies indicated that the adsorption process well fits the pseudo-second-order kinetics with a very rapid initial adsorption rate of 15.28 mg g(-1) min(-1). The appropriate solution pH for Ag(I) adsorption is around 2.0-5.4. The PMPSQ microspheres demonstrate a promising application in the removal of Ag(I) ions from aqueous solutions. (C) 2010 Elsevier Ltd. All rights reserved.