Abstract
A novel cellulose adsorbent bearing chemically immobilized thiosemicarbaside is synthesized. The adsorbent is used for the preconcentration of cobalt (II), mercury (II), and cadmium (II) followed by their X-ray fluorescence quantification in the concentrate. After approximation of experimental data on sorption capacity dependency on equilibrium concentration of element in the solution in coordinates of the Langmuir equation, the linear functions with correlation coefficient ≥ 0.99 were obtained. These functions we used to calculate maximum adsorption capacity (A мах ) and adsorption equilibrium constant. Using pseudo-first order kinetic equations for the approximation of experimental data on time-dependencies of sorbents capacity for Сd 2+ , Co 2+ , Hg 2+ the sorption rate constants were calculated. The possibility of determination of adsorbed Сd 2+ , Co 2+ , Hg 2 , by X-ray fluorescence in the sorbent phase was estimated for concentration phase under static conditions and pH =9 in case of the presence of all metals. Keywords : cellulose adsorbent, thiosemicarbazide, preconcentration (Russian) DOI: http://dx.doi.org/10.15826/analitika.2013.17.4.004 Dzh.N. Konshina, Z.A. Temerdashev, V.V. Konshin, E.I. Byshkina Federal State Educational Institution of Higher Professional Education «Kuban State University» , Krasnodar, Russian Federation
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