TY - JOUR
T1 - Removal of copper from aqueous solution by aminated and protonated mesoporous aluminas
T2 - Kinetics and equilibrium
AU - Rengaraj, Selvaraj
AU - Kim, Younghun
AU - Joo, Cheol Kyun
AU - Yi, Jongheop
N1 - Funding Information:
The authors are thankful to the National Research Laboratory (NRL) of the Korean Science and Engineering Foundation (KOSEF) for financial support of this work.
PY - 2004/5/1
Y1 - 2004/5/1
N2 - A novel adsorbent, aminated and protonated mesoporous alumina, was prepared and employed for the removal of copper from aqueous solution at concentrations between 5 and 30 mg/l, in batch equilibrium experiments, in order to determine its adsorption properties. The removal of copper by the adsorbents increases with increasing adsorbent dosages. The adsorption mechanism is assumed to be an ion exchange between copper and the hydrogen ions present on the surface of the mesoporous alumina. The adsorbent was characterized by XRD, TEM, SEM, and BET methods. The sorption data have been analyzed and fitted to linearized adsorption isotherm of the Freundlich, Langmuir, and Redlich-Peterson models. The batch sorption kinetics have been tested for first-order, pseudo-first-order, and pseudo-second-order kinetic reaction models. The rate constants of adsorption for all these kinetic models have been calculated. Results also showed that the intraparticle diffusion of Cu(II) on the mesoporous catalyst was the main rate-limiting step.
AB - A novel adsorbent, aminated and protonated mesoporous alumina, was prepared and employed for the removal of copper from aqueous solution at concentrations between 5 and 30 mg/l, in batch equilibrium experiments, in order to determine its adsorption properties. The removal of copper by the adsorbents increases with increasing adsorbent dosages. The adsorption mechanism is assumed to be an ion exchange between copper and the hydrogen ions present on the surface of the mesoporous alumina. The adsorbent was characterized by XRD, TEM, SEM, and BET methods. The sorption data have been analyzed and fitted to linearized adsorption isotherm of the Freundlich, Langmuir, and Redlich-Peterson models. The batch sorption kinetics have been tested for first-order, pseudo-first-order, and pseudo-second-order kinetic reaction models. The rate constants of adsorption for all these kinetic models have been calculated. Results also showed that the intraparticle diffusion of Cu(II) on the mesoporous catalyst was the main rate-limiting step.
KW - Copper(II)
KW - Equilibrium
KW - Kinetics
KW - Mesoporous alumina
KW - Sorption
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U2 - 10.1016/j.jcis.2004.01.007
DO - 10.1016/j.jcis.2004.01.007
M3 - Article
C2 - 15051430
AN - SCOPUS:1642420302
SN - 0021-9797
VL - 273
SP - 14
EP - 21
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
IS - 1
ER -