Adsorption of Eu(III) onto bentonite and phyllite: A comparative study

Kyzioł-Komosińska, Joanna; Janeczek, Janusz; Krzykawski, Tomasz; Fabiańska, Monika J.; Matuszewska, A.; Dzieniszewska, Agnieszka; Teper, Ewa; Pająk, Magdalena; Sawicka, Natalia

doi:10.1016/j.clay.2019.105330

Cited by 14 publications

(8 citation statements)

References 55 publications

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“…The Cs-and Eu-sorption onto raw Kimolos bentonite found to be slightly affected by the temperature and thermodynamic studies revealed a spontaneous process exothermic in the case of Cs, and endothermic in the case of Eu [9,19]. In most of the articles ion exchange is dominated on Cs-sorption while in the case of Eu, many researchers observed complex mechanism combining cation exchange and surface complexation [20][21][22][23].…”

Section: Sorption Studiesmentioning

confidence: 99%

“…Therefore, europium can be used as a chemical analog of americium for laboratory studies [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…Concerning the Cs and Co-sorption by bentonites a significant number of articles has appeared and is still appearing in the literature [3][4][5][6][7][8][9][14][15][16][17][18]. The sorption of europium onto bentonites and zeolites is less investigated [19][20][21][22][23]. Moreover, little is known about the effect of irradiation on the sorption of the above ions especially using low irradiation doses [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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The effect of irradiation on the Cs, Co and Eu-removal from aqueous solutions using Greek minerals

Dianellou

Karantoumanis

Tsamos

et al. 2023

J Radioanal Nucl Chem

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Sorption properties of Greek bentonites and zeolites were investigated in raw form and after irradiation for removal of Cs, Co and Eu from aqueous solutions using 137Cs, 60Co and 152Eu as tracers and γ-spectroscopy. The sorption experiments were undertaken under different conditions (pH, concentration, competitive ions and temperature). The structural changes of the sorbents due to irradiation and metal sorption were examined through XRD, FTIR and SEM/EDS. Sorption isotherms were reproduced by mathematical models and thermodynamic parameters were derived. The results showed that the sorption capacity was slightly affected by irradiation. The environmental compatibility tests proved the safe disposal of the investigated materials.

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Section: Sorption Studiesmentioning

confidence: 99%

“…Therefore, europium can be used as a chemical analog of americium for laboratory studies [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effect of irradiation on the Cs, Co and Eu-removal from aqueous solutions using Greek minerals

Dianellou

Karantoumanis

Tsamos

et al. 2023

J Radioanal Nucl Chem

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“…Bentonite was from the Miocene Kopernica deposit in Slovakia (Górniak et al 2016). Mineral and chemical compositions together with textural and physical properties of these minerals are given in Kyzioł-Komosińska et al (2019a). Powdered phyllite (Phy) and bentonite (B), both with particle size <10 µm, were thoroughly mixed in weight proportions of 75/25, 50/50, and 25/75.…”

Section: Adsorbentsmentioning

confidence: 99%

“…However, bentonites undergo dehydration, mechanical degradation, and structural transformation decreasing their adsorption capacity at a temperature above 100 o C expected at the contact with waste containers and other rocks of high thermal resistance and high adsorption capacity for radionuclides are being sought (Xiao et al 2013). Previous studies show that argillaceous phyllites, while less efficient adsorbents than bentonites have high adsorption capacity for low initial concentrations of actinides (<5•10 -5 M) and much higher adsorption capacity than quartz, especially at low pH (Kar et al 2011;Kyzioł-Komosińska et al 2019a). Moreover, they are thermally stable up to 400°C.…”

Section: Introductionmentioning

confidence: 99%

Phyllite/bentonite mixture as a novel effective buffer material for a geological disposal of radioactive waste

Kyzioł-Komosińska

Janeczek

Dzieniszewska

et al. 2023

Preprint

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The use of phyllite (Phy) instead of quartz in mixtures with bentonite (B) is recommended as a buffer material for engineering barriers in a geological repository of nuclear waste. The recommendation is based on experimentally determined sorption properties of various Phy/ B mixtures. The adsorption capacity of Phy/B mixtures (Phy/B: 75/25, 50/50, and 25/75), the removal efficacy of Eu(III) ions (an analog for fissiongenic lanthanides and actinides) and the rate of their binding reaction were studied using the batch adsorption equilibrium and kinetic experiments at different Eu(III) initial concentrations, solution pH and solution to adsorbent (L:S) ratio. The adsorption capacity of the Phy/B mixtures increased with the increased bentonite content in the mixture depending on the L:S ratio and solution pH. The highest increase in the adsorption capacity of the Phy/B mixtures compared to phyllite was observed for the Phy/B proportions of 25/75 and 50/50. The rate of the Eu(III) adsorption was the best fitted by the pseudo-second order kinetic model indicating that the adsorption rate was controlled by chemisorption. The Sips model provided the best correlation of the adsorption experimental data, indicative of more than one adsorption site. The results of this study show the advantage of the Phy/B mixtures in immobilizing Eu and certain fission products by combining adsorption properties of the materials.

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Phyllite/bentonite mixture—an alternative effective buffer material for a geological disposal of radioactive waste

Kyzioł-Komosińska,

Janeczek,

Dzieniszewska

et al. 2023

Environ Sci Pollut Res

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The use of phyllite (Phy) instead of quartz in mixtures with bentonite (B) is recommended as a buffer material for engineering barriers in a geological repository of nuclear waste. The recommendation is based on experimentally determined sorption properties of various Phy/B mixtures. The adsorption capacity of Phy/B mixtures (Phy/B: 75/25, 50/50, and 25/75), the removal efficacy of Eu(III) ions (an analog for fissiongenic lanthanides and actinides), and the rate of their binding reaction were studied using the batch adsorption equilibrium and kinetic experiments at different Eu(III) initial concentrations, solution pH, and solution to adsorbent (L/S) ratio. The adsorption capacity of the Phy/B mixtures increased with the increased bentonite content in the mixture depending on the L/S ratio and solution pH. The highest increase in the adsorption capacity of the Phy/B mixtures compared to phyllite was observed for the Phy/B proportions of 25/75 and 50/50. The rate of the Eu(III) adsorption was the best fitted by the pseudo-second-order kinetic model indicating that the adsorption rate was controlled by chemisorption. The Sips model provided the best correlation of the adsorption experimental data, indicative of more than one adsorption site. The results of this study show the advantage of the Phy/B mixtures in immobilizing Eu and certain fission products by combining adsorption properties of the materials.

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Adsorption of Eu(III) onto bentonite and phyllite: A comparative study

Cited by 14 publications

References 55 publications

The effect of irradiation on the Cs, Co and Eu-removal from aqueous solutions using Greek minerals

The effect of irradiation on the Cs, Co and Eu-removal from aqueous solutions using Greek minerals

Phyllite/bentonite mixture as a novel effective buffer material for a geological disposal of radioactive waste

Phyllite/bentonite mixture—an alternative effective buffer material for a geological disposal of radioactive waste

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