Transport of 125I−, 137Cs+ and 85Sr2+ in granitoidic rock and soil columns

Palágyi, Š.; Ştamberg, K.

doi:10.1007/s10967-010-0719-x

Cited by 10 publications

(1 citation statement)

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“…An accurate understanding of this transport is required to successfully formulated and use these models. Palagyi and Stamberg (2010) found that the modified convection dispersion equation (CDE) gives rather better results for transport of 125 I, 137 Cs, and 85 Sr in granitoidic rock and soil columns than the classical one. Limited information on the Cs and Co transport parameters such as dispersion coefficient (D), retardation factor (R), and column Peclet number (P) as well as distribution of these radionuclides in soil exists in the literature.…”

Section: Introductionmentioning

confidence: 99%

Modeling of 137Cs and 60Co transport in calcareous soils by groundwater

Ramzi¹

2014

J. Soil Sci. Environ. Manage.

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The fate of transport of radionuclides is one of the most important factors to be considered for the safety assessment of repositories of radioactive wastes in porous media. Laboratory batch and column experiments were investigated to assess the transport of 137 Cs and 60 Co in calcareous loam and clay soils leached with groundwater (GW) using convection-dispersion equation model (CDE). Fractionation of Cs and Co in eight sequential fractions in the soils was also measured. Results showed that the distribution coefficient (Kd) values for 137 Cs found to be much more as compared to 60 Co. It was ranged from 20 to 395 ml/g, depending on soil and radionuclide characteristics. The CDE model provided a fairly good fit to the experimental breakthrough curves (BTCs) of both solutes. The retardation factor (R) was 821 and 118 for 137 Cs, while it was 65 and 88 for 60 Co, for both soils, respectively. The dispersion coefficient (D) was 2.0 and 2.8 for Cs, and 0.6 and 0.7 cm 2 /min for Co for loam and clay soils, respectively. The silt+clay was the major soil fraction in retaining Cs followed by sand fraction, for both soils, while the carbonate was the major soil fraction in retaining Co followed by silt+clay, Fe oxides, and sand for loam soil, and silt+clay, sand and Fe oxides for clay soil. No large change was observed in 137 Cs retaining with leaching. The leaching consistently reduced the magnitude of 60 Co bound to carbonate and increased fraction bound to silt+clay.

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Section: Introductionmentioning

confidence: 99%