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Abstract

ADSORPTION BEHAVIOR OF Mg (II), Cu (II), Ni (II), Pb (II), Ba (II), Zn (II), Cd (II) AND Al (III) IN AQUEOUS ACETONE- AMMONIUM PROPIONATE MEDIA

Kamble Rajan S.*

Abstract

From the investigations of ion exchange in mixed solvents, it is apparent that adsorption equilibrium depends markedly on the properties of the organic solvent and reactions with the resin and electrolytes which determine the equilibrium. A variety of complexing media have been used to study the metal ion exchange on cation exchangers and their uses has been done in many analytical separations. Almost the mineral acids and their salts from a class of complexing agents which has been used by many workers. As the presence of water miscible polar solvents proved to be advantageous in the metal ion exchange in complexing media. The use of mineral acids and their salts has been done in a variety of non aqueous and mixed aqueous solvent. Fritz et al[1] separated many metal ions using 0.1 or 1 M hydrofluoric acid as the eluting agent, the method of separation of Al3+, Ti4+ , V4+ and Nb5+ ions was studied by Dowex 50 WX8 resin in H + and ethylene di -ammonium forms. Yoshimo and Koiima[2] and Strelow[3] separated cadmium from zinc and other metal ions by eluting them with 0.5 M hydrochloric acid. Strelow[4] Mann and Swanson[5] measured the equilibrium distribution coefficients which are a useful guide to possible cation exchange separations in aqueous solution. Equilibrium distribution coefficients of cations in hydrochloric acid[6], nitric acid, sulphuric acid media using BIO-RAD AG, 50 WX8, Sulforated polysterene resin have been worked out and the possibilities of separation of various metal ions indicated with the help of the distribution coefficients.

Keywords: Dowex 50 WX8 (NH4 + form), Aqueous ammonium propionate, Diffusion coefficient (KD), Binary mixtures, Eluting agent.


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