Removal of cadmium from phosphoric acid solution by solvent-impregnated resins (SIRs) - Sorption kinetics and equilibria studies

Kabay N. , Gizli N. , Demircioglu M. , YUKSEL M. , SAGLAM M., Arda M. , ...Daha Fazla

CHEMICAL ENGINEERING COMMUNICATIONS, cilt.190, ss.936-947, 2003 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 190
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1080/00986440390207521
  • Sayfa Sayıları: ss.936-947


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% H3PO4 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.