Ion exchange of Cs+ and Sr2+ by natural clinoptilolite from bi-cationic solutions and XRD control of their structural positioning

Autor:	Y. Tzvetanova, Ognyan Petrov, L. Dimowa, Filip Ublekov, Iskra Piroeva, N. Lihareva, A. Nikolov
Rok vydání:	2020
Předmět:	Clinoptilolite Ion exchange Chemistry Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Analytical chemistry Cationic polymerization Langmuir adsorption model chemistry.chemical_element Sorption Pollution Analytical Chemistry Ion symbols.namesake Nuclear Energy and Engineering Desorption Caesium symbols Radiology Nuclear Medicine and imaging Spectroscopy
Zdroj:	Journal of Radioanalytical and Nuclear Chemistry. 323:1093-1102
ISSN:	1588-2780 0236-5731
Popis:	Clinoptilolite from Bulgaria was tested for uptake towards Cs+ and Sr2+ from bi-cationic solutions using batch technique. Contact time and cation concentrations were investigated, revealing minor difference in Cs+ sorption from single and mixed solutions but clear difference in Sr2+ uptake. Kinetic data were fit with pseudo-second-order kinetic model. The Langmuir isotherm model provided best description of equilibrium ion-exchange data [qmax (mg/g) is 122.7 for Cs+ and 21.50 for Sr2+]. Desorption experiments show that cesium and strontium ions are retained strongly by clinoptilolite. Rietveld structure refinement showed that approximately four Cs+ ions were exchanged versus one Sr2+ ion in clinoptilolite.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2ef17103010b12a2e7d9f45b20a67bda https://doi.org/10.1007/s10967-020-07018-7 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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