Removal of cadmium from phosphoric acid solution by solvent-impregnated resins (sirs) - sorption kinetics and equilibria studies
Makaleler > Tam Makale · 2003
Yazarlar: N. Kabay, Nilay GİZLİ, M. Demircioğlu, M. Yuksel, M. Sağlam, Müşerref ARDA, U. Yuksel, B. Saha, M. Streat
Chemical Engineering Communications, Uluslararası, Wos, 2003, cilt 190, ss 936-947
Özet
Cyanex-302 (bis [2,4,4-trimethylpentyl] monothiophosphinic acid) was impregnated into macroporous Diaion HP-10 and HP-1MG polymeric resin matrices and used as an extractant to recover cadmium from concentrated phosphoric acid. The optimum conditions for batchwise extraction of cadmium were established, and equilibrium data in the concentration range 0-200 mg/L Cd were obtained in 40% H 3 PO 4 solution. A Langmuir adsorption isotherm gave the best fit of the adsorption equilibrium data. A preliminary kinetic study was carried out in order to elucidate the rate-controllingmechanism. The uptake of trace cadmium onto Cyanex 302 containing solvent-impregnated resins from 40% phosphoric acid appears to be particle diffusion controlled.