Removal of copper from aqueous solution by aminated and protonated mesoporous aluminas

Kinetics and equilibrium

Selvaraj Rengaraj, Younghun Kim, Cheol Kyun Joo, Jongheop Yi

Research output: Contribution to journalArticle

185 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)14-21
Number of pages8
JournalJournal of Colloid and Interface Science
Volume273
Issue number1
DOIs
Publication statusPublished - May 1 2004

Fingerprint

Aluminum Oxide
adsorbents
Adsorbents
Copper
Alumina
aluminum oxides
aqueous solutions
copper
Kinetics
adsorption
kinetics
Adsorption
sorption
Sorption
hydrogen ions
Adsorption isotherms
Reaction kinetics
Protons
Rate constants
Ion exchange

Keywords

  • Copper(II)
  • Equilibrium
  • Kinetics
  • Mesoporous alumina
  • Sorption

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces

Cite this

Removal of copper from aqueous solution by aminated and protonated mesoporous aluminas : Kinetics and equilibrium. / Rengaraj, Selvaraj; Kim, Younghun; Joo, Cheol Kyun; Yi, Jongheop.

In: Journal of Colloid and Interface Science, Vol. 273, No. 1, 01.05.2004, p. 14-21.

Research output: Contribution to journalArticle

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