Selective ion exchange onto Slovakian natural zeolites in aqueous solutions

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• 作者：E. Chmielewská (1) chmielewska@fns.uniba.sk
  J. Lesny (2)
• 关键词：Clinoptilolite ; and mordenite ; rich tuffs – Ammonium and some radioisotopes – Ion exchange – Selectivity sequence – Radioanalytical determination – Radionucleides
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2012
• 出版时间：August 2012
• 年：2012
• 卷：293
• 期：2
• 页码：535-543
• 全文大小：243.5 KB
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• 作者单位：1. Faculty of Natural Sciences, Comenius University, 84215 Bratislava, Slovak Republic2. Department of Biotechnologies, University of Ss. Cyril and Methodius, 91701 Trnava, Slovak Republic
• ISSN：1588-2780

文摘

Ion exchange isotherms have been measured and plotted for the uptake of cesium, barium, cobalt, zinc, silver and amonium onto clinoptilolite- and mordenite-rich tuffs of Slovakian origin selectively for both the natural and near homoionic Na form as well, using the radioanalytical determination. The higher quality clinoptilolite-rich tuff has been proven to be effective for a potential radionucleides removal in native form according to the following selectivity sequence: Ag+,Ba2,Cs+>NH₄ +>Co2+, while parent tuff in Na exchanged variety exhibited a little different sequence according to: Ag+ > NH₄ + > Ba2+ > Cs+. The raw and Na exchanged mordenite-rich tuffs proved subsequently more or less similar selectivity : Ag+ > Zn2+ > Cs+, Ba2+ > Co2+ and Ag+ > Zn2+.