Selectivity of Th(IV) adsorption as compared to U(VI), La(III), Ce(III), Sm(III) and Gd(III) using mesoporous Al2O3

Herein, we have used mesoporous Al 2 O 3 as adsorbent and compared its efficacy with chromatographic neutral alumina for the selective adsorption and separation of Th(IV). The metal ions form complex with thorin and the Th-thorin complex gets selectively adsorbed on the mesoporous alumina at pH 1 un...

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Bibliographic Details
Published inSeparation science and technology Vol. 56; no. 14; pp. 2369 - 2384
Main Authors Karmakar, Rajib, Singh, Pritam, Sen, Kamalika
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 22.09.2021
Taylor & Francis Ltd
Subjects
Adsorption
Aluminum oxide
Citric acid
Coordination compounds
Gadolinium
isotherm
Metal ions
Metals
Rare earths
Selective adsorption
Selectivity
separation
Sodium citrate
Th(IV)
Thorium
U(VI)
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Summary:Herein, we have used mesoporous Al 2 O 3 as adsorbent and compared its efficacy with chromatographic neutral alumina for the selective adsorption and separation of Th(IV). The metal ions form complex with thorin and the Th-thorin complex gets selectively adsorbed on the mesoporous alumina at pH 1 unlike other metal ions. The R 2 value of Langmuir isotherm model was found to be the highest and closer to 1. The adsorption capacities at 283, 303 and 328 K were found to be 50, 51.02 and 51.81 µmolg −1 respectively. The adsorbed thorium was desorbed from the adsorber upon treatment with trisodium citrate.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2020.1828461