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Eu(III) sorption onto various montmorillonites: Experiments and modeling
https://orcid.org/0000-0002-7805-8670
Abstract The sorption of Eu(III) onto montmorillonite samples from different deposits such as those of Kutch (India), 10th Khutor deposit (Russia), and Cortijo de Archidona (Spain) was studied over a wide range of experimental conditions by varying the total Eu concentration, pH, and ionic strength. Various bentonite samples showed quantitative sorption at all pH values at low ionic strengths of the solution because of ion exchange interactions. At a higher ionic strength (1 M NaClO4), the sorption is pH-dependent because of the interaction with edge sorption sites and it differed from sample to sample. The difference in the mechanism of interaction at different ionic strengths was confirmed by time-resolved laser-induced fluorescence. Thermodynamic modeling was performed with all experimental data for montmorillonite samples from different sources to create a generalized model for describing their interaction with Eu(III).
Graphical abstract Display Omitted
Highlights Sorption of Eu(III) onto previously not studied montmorillonite is investigated. Samples include new Kutch bentonite from India and Khakassia bentonite from Russia. Admixture iron oxyhydroxide in Kutch bentonite influences Eu(III) sorption. Thermodynamic model describing Eu(III)–montmorillonite interaction is proposed. The constant for ion-exchange Eu(III) reaction with montmorillonite is calculated.
Eu(III) sorption onto various montmorillonites: Experiments and modeling
https://orcid.org/0000-0002-7805-8670
Abstract The sorption of Eu(III) onto montmorillonite samples from different deposits such as those of Kutch (India), 10th Khutor deposit (Russia), and Cortijo de Archidona (Spain) was studied over a wide range of experimental conditions by varying the total Eu concentration, pH, and ionic strength. Various bentonite samples showed quantitative sorption at all pH values at low ionic strengths of the solution because of ion exchange interactions. At a higher ionic strength (1 M NaClO4), the sorption is pH-dependent because of the interaction with edge sorption sites and it differed from sample to sample. The difference in the mechanism of interaction at different ionic strengths was confirmed by time-resolved laser-induced fluorescence. Thermodynamic modeling was performed with all experimental data for montmorillonite samples from different sources to create a generalized model for describing their interaction with Eu(III).
Graphical abstract Display Omitted
Highlights Sorption of Eu(III) onto previously not studied montmorillonite is investigated. Samples include new Kutch bentonite from India and Khakassia bentonite from Russia. Admixture iron oxyhydroxide in Kutch bentonite influences Eu(III) sorption. Thermodynamic model describing Eu(III)–montmorillonite interaction is proposed. The constant for ion-exchange Eu(III) reaction with montmorillonite is calculated.
Eu(III) sorption onto various montmorillonites: Experiments and modeling
https://orcid.org/0000-0002-7805-8670
Abstract The sorption of Eu(III) onto montmorillonite samples from different deposits such as those of Kutch (India), 10th Khutor deposit (Russia), and Cortijo de Archidona (Spain) was studied over a wide range of experimental conditions by varying the total Eu concentration, pH, and ionic strength. Various bentonite samples showed quantitative sorption at all pH values at low ionic strengths of the solution because of ion exchange interactions. At a higher ionic strength (1 M NaClO4), the sorption is pH-dependent because of the interaction with edge sorption sites and it differed from sample to sample. The difference in the mechanism of interaction at different ionic strengths was confirmed by time-resolved laser-induced fluorescence. Thermodynamic modeling was performed with all experimental data for montmorillonite samples from different sources to create a generalized model for describing their interaction with Eu(III).
Graphical abstract Display Omitted
Highlights Sorption of Eu(III) onto previously not studied montmorillonite is investigated. Samples include new Kutch bentonite from India and Khakassia bentonite from Russia. Admixture iron oxyhydroxide in Kutch bentonite influences Eu(III) sorption. Thermodynamic model describing Eu(III)–montmorillonite interaction is proposed. The constant for ion-exchange Eu(III) reaction with montmorillonite is calculated.
Eu(III) sorption onto various montmorillonites: Experiments and modeling
Verma, Parveen K. (Autor:in) / Semenkova, Anna S. (Autor:in) / Krupskaya, Victoria V. (Autor:in) / Zakusin, Sergey V. (Autor:in) / Mohapatra, Prasanta K. (Autor:in) / Romanchuk, Anna Yu. (Autor:in) / Kalmykov, Stepan N. (Autor:in)
Applied Clay Science ; 175 ; 22-29
01.03.2019
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Europium , Sorption , Cation exchange , Clay , Bentonite , Montmorillonite , Smectite
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