Cs+ sorption onto Kutch clays: Influence of competing ions

Semenkova, Anna; Evsiunina, Mariia V.; Verma, Parveen K.; Mohapatra, P. Κ.; Петров, В. Г.; Серегина, И. Ф.; Bolshov, M.A.; Krupskaya, V. V.; Romanchuk, Anna Yu.; Kalmykov, Stepan N.

doi:10.1016/j.clay.2018.09.010

Cited by 33 publications

(12 citation statements)

References 33 publications

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“…The samples were mixed continuously using an end-over-end mixer. After 24 h (equilibrium time was taken from the paper [16]), the equilibrium pH was measured and 1 mL of each suspension was centrifuged at 40,000× g (Allegra 64R, Beckman Coulter, Brea, CA, USA) for 15 min to remove colloidal mineral particles, and the supernatant was collected and used for radioactivity measurements. The concentration of 137 Cs was measured by liquid scintillation counting using a Quantulus-1220 (Perkin Elmer, Waltham, MA, USA) device.…”

Section: Sorption Experimentsmentioning

confidence: 99%

“…A number of studies have shown that sorption of cesium on bentonite [16], illite [40], zeolite [7] and diatomite [9] occurs quickly during the first hours of interaction. It has also been shown that the decrease in sorption observed at pH values below 4 can be explained by the competition between Cs + ions and H + [16,41]. The highest Kd values are obtained for samples of zeolite and glauconite (log K d 4.0 and 3.8, respectively).…”

Section: Cesium Sorptionmentioning

confidence: 99%

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Cesium Sorption and Desorption on Glauconite, Bentonite, Zeolite, and Diatomite

et al. 2019

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This study is devoted to studying the sorption of 137Cs on mineral sorbents at a wide pH range, from 2 to 10, as well as to studying sorption mechanisms. In order to obtain the most reliable sorption characteristics, samples of high purity were examined as sorbents: bentonite, glauconite, zeolite, and diatomite. A detailed description of their mineral composition, cation exchange capacity and specific surface of sorbents is given. XRD, XRF, FTIR, SEM, and BET adsorption methods were used for assaying. The sorption and desorption values were identified for each sorbent. As a result of the conducted research, it can be concluded that 137Cs sorption mainly occurs through the exchange reaction on zeolite, glauconite and bentonite. The highest cesium Kd was observed on zeolite due to its high CEC and amounted to 4.05 mg/L at pH 7. The higher sorption capacity of glauconite in comparison with bentonite is primarily due to the high layer charge which is mainly localized in tetrahedral sheets, and to the existence of highly selective sorption sites (frayed edge sites) on the glauconite surface. Diatomite showed the lowest sorption capacity provided by the presence of a small quantity of smectite and kaolinite in its composition. The values of desorption increase in the following order: zeolite < bentonite ~ diatomite < glauconite.

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Section: Sorption Experimentsmentioning

confidence: 99%

Section: Cesium Sorptionmentioning

confidence: 99%

Cesium Sorption and Desorption on Glauconite, Bentonite, Zeolite, and Diatomite

et al. 2019

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“…Absence of any significant changes was determined in values of sorption was determined. The sorption behaviour of Np(V) onto different clays and clay minerals was compared [3,4]. At pH>5, the interlayer cations in montmorillonite had no influence on sorption.…”

Section: Resultsmentioning

confidence: 99%

Sorption of radionuclides onto minerals: Experiments and modelling

et al. 2019

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Sorption of various radionuclides such as Cs(I), Eu(III)/Am(III), Np(V), U(VI) and others onto iron oxide (goethite, hematite) and clay minerals (montmorillonite, kaolinite) was studied at wide experimental range (pH ionic strength, total radionuclides concentrations). In all case athermodynamic model for describing sorption onto studied minerals was built and successfully applied for all experiments. The required constants were calculated or verified from published data. For modelling sorption in mineral assemblages Component Additivity (CA) approach was successfully applied.

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“…For example, the competition sorption in presence of natural trace elements, e.g. Al 3+ , Fe 3+ , might bias some parameters of the model (Semenkova et al, 2018;Verma et al, 2019). As another example, experiments with U(VI) are sensitive to residual concentration of carbonates, e.g.…”

Section: Modellingmentioning

confidence: 99%

Effect of organic compounds on the retention of radionuclides in clay rocks: Mechanisms and specificities of Eu(III), Th(IV), and U(VI)

Fralova

Lefèvre

Madé

et al. 2021

Applied Geochemistry

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Cs+ sorption onto Kutch clays: Influence of competing ions

Cited by 33 publications

References 33 publications

Cesium Sorption and Desorption on Glauconite, Bentonite, Zeolite, and Diatomite

Cesium Sorption and Desorption on Glauconite, Bentonite, Zeolite, and Diatomite

Sorption of radionuclides onto minerals: Experiments and modelling

Effect of organic compounds on the retention of radionuclides in clay rocks: Mechanisms and specificities of Eu(III), Th(IV), and U(VI)

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