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The adsorption behavior of cesium on poly(N-isopropylacrylamide/itaconic acid) copolymeric hydrogels

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Abstract

In this study, N-isopropylacrylamide/itaconic acid (NIPAAm/IA) hydrogels prepared by irradiating with γ radiation were used in experiments on cesium ion adsorption. The cesium ion adsorption capacity of the hydrogels was investigated as a function of Cs+ concentration, pH and temperature. The adsorption behavior of cesium was evaluated by using the radiotracer method. The adsorption isotherm models were applied to the experimental data, and it was seen that Freundlich isotherm explained the adsorption better than Langmuir isotherm. Two simplified kinetic models including pseudo-first-order and pseudo-second-order equation were selected to follow the adsorption processes. The Cs+ adsorption could be best described by the pseudo-first-order equation. The thermodynamic parameters including ΔG°, ΔH° and ΔS° for adsorption processes of Cs+ on the hydrogel were also calculated, and the negative ΔH° and ΔG° confirmed that the adsorption process was exothermic and spontaneous.

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Authors and Affiliations

  1. Taek, Cekmece Nuclear Research and Training Centre, Altinsehir Yolu, 5. km, Halkali, 34303, Istanbul, Turkey

    Betül Taşdelen, A. Erdal Osmanlioglu & Erol Kam

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  1. Betül Taşdelen
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  2. A. Erdal Osmanlioglu
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  3. Erol Kam
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Correspondence to Betül Taşdelen.

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Taşdelen, B., Osmanlioglu, A.E. & Kam, E. The adsorption behavior of cesium on poly(N-isopropylacrylamide/itaconic acid) copolymeric hydrogels. Polym. Bull. 70, 3041–3053 (2013). https://doi.org/10.1007/s00289-013-1006-0

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  • DOI: https://doi.org/10.1007/s00289-013-1006-0

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