Title
Synthesis of high-surface-area γ-Al <inf>2</inf> O <inf>3</inf> from aluminum scrap and its use for the adsorption of metals: Pb(II), Cd(II) and Zn(II)
Date Issued
01 October 2012
Access level
open access
Resource Type
journal article
Author(s)
Universidade de São Paulo
Publisher(s)
Elsevier B.V.
Abstract
Several types of alumina were synthesized from sodium aluminate (NaAlO 2 ) by precipitation with sulfuric acid (H 2 SO 4 ) and subsequently calcination at 500°C to obtain γ-Al 2 O 3 . The precursor aluminate was derived from aluminum scrap. The various γ-Al 2 O 3 synthesized were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), adsorption-desorption of N 2 (S BET ) and scanning electron microscopy (SEM). XRD revealed that distinct phases of Al 2 O 3 were formed during thermal treatment. Moreover, it was observed that conditions of synthesis (pH, aging time and temperature) strongly affect the physicochemical properties of the alumina. A high-surface-area alumina (371 m 2 g -1 ) was synthesized under mild conditions, from inexpensive raw materials. These aluminas were tested for the adsorption of Cd(II), Zn(II) and Pb(II) from aqueous solution at toxic metal concentrations, and isotherms were determined. © 2012 Elsevier B.V.
Start page
10002
End page
10011
Volume
258
Issue
24
Language
English
OCDE Knowledge area
Bioproductos (productos que se manufacturan usando biotecnología), biomateriales, bioplásticos, biocombustibles, materiales nuevos bioderivados, químicos finos bioredivados
Química física
Subjects
Scopus EID
2-s2.0-84864666667
Source
Applied Surface Science
ISSN of the container
01694332
Sponsor(s)
The authors wish to thank the Academic Research Office of the Pontificia Universidad Católica del Perú (DAI-PUCP) , for their support for the development of this work, and the Brazilian National Council for Scientific Development (CNPq) for the fellowship. We also thank the Department of Chemical Engineering and Environmental Technologies at the University of Zaragoza (Spain), for their support for the analysis of surface area, and the Instituto de Química de São Carlos of the Universidade de São Paulo (Brazil), for the SEM analyses.
Sources of information:
Directorio de Producción Científica
Scopus