Sorption/desorption of Cs on clay and soil fractions from various regions of Turkey

Erten, H. N.; Aksoyoğlu, Şebnem; Göktürk, H.

doi:10.1016/0048-9697(88)90348-8

Cited by 25 publications

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“…The ion exchange properties of kaolinite are generally believed to reflect broken bonds and possibly OH bonds on the surface of the clay particles (Carroll, 1959). It was thus expected that distribution ratios for kaolinite would exhibit a dependence on the particle size, as was previously observed with Cs + and Si 2+ cations in our studies (Erten et al, 1988a;Erten et al, 1988b). However, such a strong dependence was not observed.…”

Section: Resultssupporting

confidence: 56%

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Sorption-desorption behaviour of barium on clays

Eylem¹,

Erten²,

Göktürk³

1990

Journal of Environmental Radioactivity

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Batch experiments were performed to study the sorption behaviour of Ba2+ ion on three different clay minerals determined to be predominantly kaolinite, montmorillonite and mixed chlorite-illite. Synthetic groundwater was used and the concentration of Ba2+ ion was in the range of 10-8 to 10-4 N. Grain sizes of the solid particles were all <38 μm. Cation exchange capacities were obtained using the silver-thiourea (AgTU) method. The variation of RD values was studied as a function of contact time, shaking rate, Ba2+ ion concentration, v/m ratio and pH. The saturation time varied with each type of clay; about 6, 8 and 12 days of shaking time were necessary for chlorite-illite mixed clay, kaolinite and montmorillonite respectively. Shaking rate affected only the rate of sorption and not the saturaton RD values. Sorption was found to be reversible on kaolinite and partly reversible on montmorillonite and chlorite-illite clays. The variation of RD as a function of Ba2+ ion concentration exhibited characteristic inverse S-shaped curves suggesting the presence of at least two different types of exchange sites. Sorption of Ba2+ ion was observed to depend on pH and v/m ratio. The sorption isotherms were found to fit Freundlich and Dubinin-Radushkevich type isotherms well. © 1990

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Section: Resultssupporting

confidence: 56%

“…Our previous work on sorption has been concerned with the fission products cesium and strontium (Erten et al, 1988a;Erten et al, 1988b). Surveying the literature on the subject, it appears that the sorption of barium has not been extensively studied.…”

mentioning

confidence: 99%

Sorption-desorption behaviour of barium on clays

Eylem¹,

Erten²,

Göktürk³

1990

Journal of Environmental Radioactivity

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“…In batch experiments, the distribution ratio, R d , which expresses the concentration of the sorbed cation on the solid phase to that in the aqueous phase were calculated from the measured initial and final activities using equations given elsewhere [16].…”

Section: Introductionmentioning

confidence: 99%

Migration Behaviour of Barium and Strontium in Granite

1994

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Granite / Sorption / Batch method / Column method / Retardation factor / Distribution ratios SummaryThe sorption behaviour of Ba 2+ and Sr 2 " 1 " cations on granite have been studied under flowing and static conditions in column and batch experiments. 133 Ba, '"Sr and 3 H were used as radio tracers. The retardation factors, R fi and distribution ratios, R d , of barium and strontium in column experiments were found to be smaller than those from batch experiments. In both techniques barium was sorbed more strongly on granite than strontium. Sorption energies were found to be in good agreement with literature values.

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“…Many studies investigating different aspects of the sorption behavior of this radionuclide on various clay minerals have been carried out. [2][3][4][5][6] In this work the effect of time, cation concentration, and temperature on the uptake of Cs + by the clay minerals kaolinite, chloriteillite, and bentonite was studied.…”

Section: Introductionmentioning

confidence: 99%

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Shahwan

Erten

2002

Journal of Radioanalytical and Nuclear Chemistry

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The sorption behavior of Cs + on kaolinite, chlorite-illite, and bentonite clays as a function of time, cation concentration, and temperature was studied using the radiotracer method. Sorption data were well represented by Freundlich and Dubinin-Radushkevich type isotherms. Bentonite was found to have the highest sorption capacity and the highest exchange affinity to Cs + . In all three cases Cs + sorption was found to be exothermic with ∆H° (kJ/mol) -13, -8, -19 and ∆S° (J/mol . K) -15, 31, and -3 for kaolinite, chlorite-illite, and bentonite, respectively. Negative ∆G° values were obtained in all cases, indicating the spontaneity of sorption. The magnitudes of ∆G° suggest that ion exchange is the primary sorption mechanism.

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Sorption/desorption of Cs on clay and soil fractions from various regions of Turkey

Cited by 25 publications

References 0 publications

Sorption-desorption behaviour of barium on clays

Sorption-desorption behaviour of barium on clays

Migration Behaviour of Barium and Strontium in Granite

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