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Título: | Uptake of Cu2+, Cd2+ and Pb2+ on Zn-Al layered double hydroxide intercalated with edta |
Autor: | Pavlovic, I.; Barriga, C.; Cornejo, J. CSIC ORCID; Hermosín, M.C. CSIC ORCID; Ulibarri Cormenzana, M. A. | Fecha de publicación: | 2006 | Editor: | Elsevier | Citación: | Applied Clay Science 32(3-4): 245-251 (2006) | Resumen: | Hydrotalcite-like compound [Zn2Al(OH)6]2edta·nH2 O(ZnAl-edta) was obtained from the precursor [Zn2Al(OH)6]NO3·nH2O (ZnAl-NO3), by the anion exchange method, with the aim of uptake Cu2+, Cd2+ and Pb2+ from the aqueous solutions by chelating process between edta and metal cations. The amount of Cu2+, Cd2+ and Pb2+ adsorbed was monitorized by atomic absorption technique at different contact time, pH and metal concentrations. The results indicate the very fast adsorption of the metal cations by ZnAl-edta reaching the equilibrium of the uptake reaction in two hours for Cu and Pb and 24 h for Cd. The shape of the adsorption isotherms suggests specific interaction and high host-guest affinity. At pH 5.5 and initial concentration Ci = 10 mM, the amount adsorbed was Cs = 1117, 375 and 871 μmol/g for Cu2+, Cd2+ and Pb2+, respectively. | URI: | http://hdl.handle.net/10261/61462 | DOI: | 10.1016/j.clay.2006.01.008 | Identificadores: | doi: 10.1016/j.clay.2006.01.008 issn: 0169-1317 |
Aparece en las colecciones: | (IRNAS) Artículos |
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