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Sorption of cesium and iodide ions onto KENTEX-bentonite

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Abstract

The sorption of cesium and iodide ions onto KENTEX-bentonite was investigated using batch test and in-diffusion test methods. The cesium ions were highly sorbed on the bentonite, and the experimental data fit the Freundlich isotherm well. The distribution coefficient, K d, of the cesium ions was variably affected by the chemical conditions of the solution (initial ion concentration, pH, salinity) and temperature. An increasing pH of solution increased the K d. However, there were different K d values that decrease with an increase in the initial ion concentration, salinity, and temperature. The iodide ions, on the contrary, were negligibly sorptive. The K d values obtained from the in-diffusion tests were quite lower than those from the batch tests, which could be explained by changes in the pore water chemistry and surface area available for sorption.

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Acknowledgments

This work was supported by Nuclear Research & Development Program of the National Research Foundation of Korea (NRF) grant funded by the Korean government (MEST).

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  1. Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-600, The Republic of Korea

    Jae Owan Lee, Won Jin Cho & Heuijoo Choi

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  1. Jae Owan Lee
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  2. Won Jin Cho
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Correspondence to Jae Owan Lee.

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Lee, J.O., Cho, W.J. & Choi, H. Sorption of cesium and iodide ions onto KENTEX-bentonite. Environ Earth Sci 70, 2387–2395 (2013). https://doi.org/10.1007/s12665-013-2530-9

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  • DOI: https://doi.org/10.1007/s12665-013-2530-9

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