Abstract
Investigation of some factors affecting the removal performance of the synthesized composite ion exchanger based on polyacrylonitrile and inorganic species is reported in this paper. The influence of pH, time, concentration of metal ions (Cs+, Co2+, Eu3+), drying temperature of the synthesized sorbent, reaction temperature on the removal percentage of cesium, cobalt, and europium ions using polyacrylonitrile–Ti(IV) tungstophosphate composite was studied. The elimination of hazardous ions—cesium, cobalt, and europium from aqueous waste was enhanced by the increase of time, pH and reduced with increasing of the concentration of metal ions, and drying of the synthesized composite. Freundlich, Langmuir, and Dubinin-Radushkevich (D–R) models were used to analyze the sorption isotherms. The experimental data fitted well with Freundlich isotherm equation. The kinetic of cesium, europium, and cobalt ions sorption on polyacrylonitrile–titanium tungstophosphate composite has been studied. Thermodynamic parameters—activation energy Ea, entropy ∆S*, and diffusion coefficients (Di) have been calculated. The particle diffusion mechanism was indicated by low activation energy values and the negativity of ∆S* refer to the stability of the exchange matrix. The reaction rate increased with increasing the sorption process temperature and with decreasing particle size and drying temperature.
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El-Aryan, Y.F., El-Kenany, W.M., Amin, M. et al. Sorption of Some Radionuclides onto Polyacrylonitrile–Ti(IV) Tungstophosphate Composite. Russ. J. Phys. Chem. 95 (Suppl 1), S171–S178 (2021). https://doi.org/10.1134/S0036024421140028
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DOI: https://doi.org/10.1134/S0036024421140028