Removal of Cd and Zn from inorganic industrial waste leachate by ion exchange.
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.
Fernández
Y
Y
Department of Chemical and Environmental Engineering, Higher Polytechnic School of Engineering, University of Oviedo, Campus of Viesques, 33203 Gijón, Spain.
Marañón
E
E
Castrillón
L
L
Vázquez
I
I
D000327:Adsorption; D002104:Cadmium / Q000302:isolation & purification*; D002411:Cation Exchange Resins; D002614:Chelating Agents; D007220:Industrial Waste / Q000517:prevention & control*; D007474:Ion Exchange; D014873:Water Pollutants / Q000302:isolation & purification*; D014876:Water Pollution / Q000517:prevention & control*; D015032:Zinc / Q000302:isolation & purification*
D002411:Cation Exchange Resins; D002614:Chelating Agents; D007220:Industrial Waste; D014873:Water Pollutants; D002104:Cadmium; D015032:Zinc