Removal of cesium ions from clays by cationic surfactant intercalation.
Chemosphere
; 168: 1068-1074, 2017 Feb.
Article
em En
| MEDLINE
| ID: mdl-27839883
ABSTRACT
We propose a new approach to remediate cesium-contaminated clays based on intercalation of the cationic surfactant dodecyltrimethylammonium bromide (DTAB) into clay interlayers. Intercalation of DTAB was found to occur very rapidly and involved exchanging interlayer cations. The reaction yielded efficient cesium desorption (â¼97%), including of a large amount of otherwise non-desorbable cesium ions by cation exchange with ammonium ions. In addition, the intercalation of DTAB afforded an expansion of the interlayers, and an enhanced desorption of Cs by cation exchange with ammonium ions even at low concentrations of DTAB. Finally, the residual intercalated surfactants were easily removed by a decomposition reaction with hydrogen peroxide in the presence of Cu2+/Fe2+ catalysts.
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Base de dados:
MEDLINE
Assunto principal:
Tensoativos
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Césio
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Silicatos de Alumínio
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Compostos de Amônio Quaternário
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article