Abstract

The methodology of stepwise synthesis of the composite sorbent based on cation exchanger and tin(IV) hydroxide was demonstrated. The results of copper(II) sorption onto the composite sorbent are presented. Langmuir, Freundlich and Temkin adsorption isotherms were used in mathematical modeling of the sorption data. The Langmuir model most accurately describes the sorption process. The constants of the Langmuir model and the specific surface area of the composite sorbent were defined. Granules of the composite sorbent were studied by scanning electron microscopy (SEM) and energy-dispersive X-ray microanalysis (EDXMA). The distribution coefficients of copper(II) in the composite sorbent and the sorption degree from CuSO4 aqueous solutions of various concentrations were computed.

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