Adsorption Properties of Zhejiang Diatomite Modified by Supramolecule

J.-B. Zhang Department of Environmental Sciences, Peking University, Beijing, P. R. China

Y.-X. Yang Department of Chemistry, East China University of Science & Technology, P. R. China; State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, P. R. ChinaCorrespondence[email protected]

Z.-L. Wang College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, P. R. China

Z. Huang Department of Chemistry, East China University of Science & Technology, P. R. China

Y.-R. Chen Department of Chemistry, East China University of Science & Technology, P. R. China

Abstract

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 0.075 g 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.

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Acknowledgments

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

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Adsorption Properties of Zhejiang Diatomite Modified by Supramolecule

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