Paper Title:
Cadmium and Zinc Biosorption by Macrocystis Pyrifera: Changes in the Biomass
  Abstract

Macrocystis pyrifera was used for the recovery of Zn2+ and Cd2+ from slightly acidic solutions (i.e., pH 4). Sorption isotherms were obtained from mono- and bi-component solutions. For the study of metal desorption, EDTA, HNO3 and Ca(NO3)2 were used as eluents. Metal release (Ca2+, Mg2+, K+ and Na+) was monitored in order to evaluate ion exchange mechanisms. After metal sorption/desorption steps the sorbent was characterized using SEM-EDAX analysis. SEM-EDAX analysis also allowed identifying the presence of elements such as Si, Al, Co, Ag, S, P, and Fe in the cell wall. Zinc desorption was almost complete when using 0.1 M nitric acid solution and the sorbent was not significantly damaged by the acidic treatment. Cadmium was completely removed from loaded sorbent when using EDTA, but at the expense of a partial degradation of the biomass as evidenced by the decrease in the intensity of the C and O peaks (SEM-EDAX).

  Info
Periodical
Advanced Materials Research (Volumes 71-73)
Edited by
Edgardo R. Donati, Marisa R. Viera, Eduardo L. Tavani, María A. Giaveno, Teresa L. Lavalle, Patricia A. Chiacchiarini
Pages
601-604
DOI
10.4028/www.scientific.net/AMR.71-73.601
Citation
J. Plaza, E. Guibal, J.M. Taulemesse, M. Viera, E. R. Donati, "Cadmium and Zinc Biosorption by Macrocystis Pyrifera: Changes in the Biomass", Advanced Materials Research, Vols. 71-73, pp. 601-604, 2009
Online since
May 2009
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$32.00
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