Abstract
The uptake of cesium from aqueous solutions (pH 5) using titanium phosphates was investigated in the absence and presence of background electrolyte (0.1 M NaNO3) using a batch technique. The determination of cesium was performed by gamma spectroscopy using 137Cs as tracer. The obtained sorption isotherms could be satisfactorily reproduced by a Langmuir sorption equation. The maximum uptake capacity values (q max) calculated fitting the experimental data by this equation were 167 and 118 mg/g for solutions of initial pH 5 in the absence and presence of background electrolyte. Kinetics data obtained at 293, 308 and 323 K could satisfactorily reproduced by the pseudo-second order equation. It was demonstrated that the new synthesized materials can remove considerable amounts of cesium from aqueous solutions and ion exchange is considered to be the principal mechanism for cesium removal. Toxicity characteristic leaching procedure and desorption tests provided data about the application of the sorbents in environmental remediation.
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Kapnisti, M., Hatzidimitriou, A.G., Noli, F. et al. Investigation of cesium uptake from aqueous solutions using new titanium phosphates ion-exchangers. J Radioanal Nucl Chem 302, 679–688 (2014). https://doi.org/10.1007/s10967-014-3286-8
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DOI: https://doi.org/10.1007/s10967-014-3286-8