Removal of Cd and Zn from inorganic industrial waste leachate by ion exchange |
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| Authors: | Fernández Y Marañón E Castrillón L Vázquez I |
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| Affiliation: | Department of Chemical and Environmental Engineering, Higher Polytechnic School of Engineering, University of Oviedo, Campus of Viesques, 33203 Gijón, Spain. |
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| Abstract: | This paper presents a study of the removal of Cd and Zn present in the leachate from an inorganic industrial waste landfill using cationic exchange resins (Amberlite 200, 252-C, IR-120, Duolite C-464), a chelating resin, Amberlite IRC 718, and an adsorbent resin, XAD-2. The chelating resin Amberlite IRC 718 presented the higher removal in batch experiments for both metals (93% for Zn and 50% for Cd). Five hundred ten bed volumes of leachate were treated in column experiments using this material, reducing the concentrations of Cd and Zn from 18 mg/dm3 to 0.1 and 1.0mg/dm3, respectively. Regeneration of the saturated bed was achieved with 11 BV of 2M HCl. |
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