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Removal of Heavy Metals by Natural Polymer: Pectin, under Laboratory Conditions

Published online by Cambridge University Press:  01 February 2011

K. Arévalo-Niño. ,
H.I. Salazar-González ,
G Rojas-Verde. ,
M.S. Flores-González  and
C. Solís-Rojas
K. Arévalo-Niño.*
Affiliation:
Instituto de Biotecnología, Facultad de Ciencias Biológicas, UANL, Pedro de Alba y Manuel L. Barragán S/N, Cd. Universitaria, San Nicolás de los Garza, N.L. C.P. 66450. México. Fax (81) 83-29-41-00 ext. 7302
H.I. Salazar-González
Affiliation:
Instituto de Biotecnología, Facultad de Ciencias Biológicas, UANL, Pedro de Alba y Manuel L. Barragán S/N, Cd. Universitaria, San Nicolás de los Garza, N.L. C.P. 66450. México. Fax (81) 83-29-41-00 ext. 7302
G Rojas-Verde.
Affiliation:
Instituto de Biotecnología, Facultad de Ciencias Biológicas, UANL, Pedro de Alba y Manuel L. Barragán S/N, Cd. Universitaria, San Nicolás de los Garza, N.L. C.P. 66450. México. Fax (81) 83-29-41-00 ext. 7302
M.S. Flores-González
Affiliation:
Instituto de Biotecnología, Facultad de Ciencias Biológicas, UANL, Pedro de Alba y Manuel L. Barragán S/N, Cd. Universitaria, San Nicolás de los Garza, N.L. C.P. 66450. México. Fax (81) 83-29-41-00 ext. 7302
C. Solís-Rojas
Affiliation:
Instituto de Biotecnología, Facultad de Ciencias Biológicas, UANL, Pedro de Alba y Manuel L. Barragán S/N, Cd. Universitaria, San Nicolás de los Garza, N.L. C.P. 66450. México. Fax (81) 83-29-41-00 ext. 7302
*
Corresponding author: [email protected]
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Abstract

Major adsorbent materials used in heavy metal ion removal from polluted aqueous streams are expensive and difficult to regenerate. In this study, the possibility of using pectin, as an alternative biosorbent material to remediate heavy metal pollution was investigated. The effects of different parameters such as pH, concentration and temperature of metal solution, and contact time on the biosorption process were studied. The maximum removal efficiency was obtained at pH 2.0 for lead and zinc and pH 4.0 for cadmium. For most of the metals tested, a contact time of 15 minutes was sufficient for achieving the maximum removal. There was no significant influence on the removal capacity of pectin by the concentration and temperature of the metal solution. Under these experimental conditions the biosorption was favorable (65% lead, 42% zinc and 55% cadmium). The ability to use pectin for the removal or recovery of metals from aqueous solutions is evident.

Keywords

adsorptionPbZn
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1277: Biomaterials–2010 , 2010 , S6-P18
Copyright
Copyright © Materials Research Society 2010

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