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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 4, No. 3, 2001, pp. 125-129
Bioline Code: ej01025
Full paper language: English
Document type: Research Article
Document available free of charge

Electronic Journal of Biotechnology, Vol. 4, No. 3, 2001, pp. 125-129

 en The release of light metals from a brown seaweed ( Sargassum check for this species in other resources sp.) during zinc biosorption in a continuous system
da Costa, Antonio Carlos Augusto; Tavares, Ana Paula Mora & de França, Francisca Pessôa

Abstract

The biosorption of zinc and calcium was investigated with a biomass of Sargassum check for this species in other resources sp., a brown seaweed, in a continuous system consisting of three serial tubular fixed-bed laboratory reactors. Results indicated that zinc was efficiently recovered by the biomass. After treatment of 9.0 liters of a mixed solution containing 130.0 mg/l zinc and 260.0 mg/l calcium, the first column of the system saturated with zinc; the remaining columns did not saturate with zinc as a result of the pre treatment performed by the first reactor. Calcium was also efficiently biosorbed by the biomass, saturating the system much faster than zinc. X-ray fluorescence spectrum indicated the presence of various elements in the structure of the Sargassum sp. biomass, especially alkaline and alkaline-earth elements. Alkaline and alkaline earth elements played a key role in the biosorption of zinc, being responsible for ion-exchange reactions performed during zinc biosorption.

Keywords
biomass, heavy metal, uptake, wastewater

 
© 2001 by Universidad Católica de Valparaíso -- Chile
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