caa a22 4500 469110058 CHVBK 20180323133108.0 cr unu---uuuuu 170328e19920501xx s 000 0 eng 10.1007/BF02041016 doi (NATIONALLICENCE)springer-10.1007/BF02041016 The removal of thorium from aqueous solutions using zeolites [Elektronische Daten] [A. Dyer, L. Jozefowicz] The ability of zeolites to remove thorium-232 from naturally radioactive thorium nitrate solutions was studied by ion exchange, adsorption and surface phenomena. The best zeolites were a clinoptilolite from Mudhills, California, USA and a mordenite rich tuff from Eastgate, Nevada, USA. As the concentration of thorium in solution was increased the mechanism of thorium removal switches from that of partial ion-exchange to a surface precipitation. This was confirmed by electron probe microanalysis (EPMA) in conjunction with XRD and Energy Dispersive X-ray analysis (EDX). A Langmuir-type of adsorption occurred with the thorium-232 daughter isotopes at the same time as partial exchange/precipitation of the thorium parent which is in regular equilibrium with its natural daughters. Some experiments with234Th were carried out to confirm this hypothesis as well as column experiments to confirm the usefulness of the Th removal. Akadémiai Kiadó, 1992 Dyer A. Cockcroft Building, Department of Chemistry and Applied Chemistry, University of Salford, M5 4WT, Salford, (UK) aut Jozefowicz L. Cockcroft Building, Department of Chemistry and Applied Chemistry, University of Salford, M5 4WT, Salford, (UK) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 159/1(1992-05-01), 47-62 0236-5731 159:1<47 1992 159 10967 https://doi.org/10.1007/BF02041016 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02041016 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dyer A. Cockcroft Building, Department of Chemistry and Applied Chemistry, University of Salford, M5 4WT, Salford, (UK) aut NATIONALLICENCE 700 1- Jozefowicz L. Cockcroft Building, Department of Chemistry and Applied Chemistry, University of Salford, M5 4WT, Salford, (UK) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 159/1(1992-05-01), 47-62 0236-5731 159:1<47 1992 159 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer