文献类型：期刊文献

英文题名：Adsorption Properties of Zhejiang Diatomite Modified by Supramolecule

作者：Zhang, J. -B.[2];Yang, Y. -X.[1,3];Wang, Z. -L.[4];Huang, Z.[1];Chen, Y. -R.[1]

机构：[1]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[2]Peking Univ, Dept Environm Sci, Beijing 100871, Peoples R China;[3]Nanjing Univ, State Key Lab Coordinat Chem, Nanjing, Peoples R China;[4]Wenzhou Univ, Coll Chem & Mat Engn, Wenzhou, Peoples R China

年份：2009

卷号：30

期号：1

起止页码：83

外文期刊名：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20090411866862);WOS:【SCI-EXPANDED(收录号:WOS:000266219100015)】；

基金：We thank the National Natural Science Foundation of China for financial support (No: 20577010).

语种：英文

外文关键词：Adsorption isotherm; adsorption kinetic model; diatomite; neodymium ion; supramolecule

摘要：In this article, Zhejiang diatomite was modified by crown ester and calix[8] arene via a decyclization and polymerization of epoxy resin. Using spectrophotometer at 655 nm with dicarboxyarsenazo III as solvent, the isotherm of the modified diatomite adsorbing trivalent neodymium ions was determined that changed from II type to IV, V type respectively when diatomite was covered more than 0.075g supramolecule/g diatomite, and the adsorption isotherm equation was also obtained. Adsorption of trivalent neodymium ions on the diatomite or the supramolecule modified diatomite was pH-dependent and well fitted by pseudo-first-order and pseudo-second-order kinetic model when the rate constants were allowed to be evaluated separately.