Extraction of alginate biopolymer present in marine alga sargassum filipendula and bioadsorption of metallic ions

Materials Research

Sirlei Jaiana Kleinübing¹  Frederico Gai¹  Caroline Bertagnolli¹  Meuris Gurgel Carlos Da Silva¹ 

[1] ,University of Campinas School of Chemical Engineering Campinas SP ,Brazil

关键词: Sargassum filipendula;    extraction;    alginate;    heavy metals;    bioadsorption;   

DOI  :  10.1590/S1516-14392013005000013

来源: SciELO

【 摘 要 】

This paper studies the bioadsorption of Pb2+, Cu2+, Cd2+ and Zn2+ ions by marine alga Sargassum filipendula and by the alginate biopolymer extracted from this alga. The objective is to evaluate the importance of this biopolymer in removing different metallic ions by the marine alga S. filipendula. In the equilibrium study, the same affinity order was observed for both bioadsorbents: Pb2+ > Cu2+ > Zn2+ > Cd2+. For Pb2+ and Cu2+ ions when the alginate is isolated and acting as bioadsorbents, adsorption capacities greater than those found for the alga were observed, indicating that it is the main component responsible for the removal of metallic ions. For Zn2+ and Cd2+ ions, greater bioadsorption capacities were observed for the alga, indicating that other functional groups of the alga, such as sulfates and amino, are also important in the bioadsorption of these ions.

【 授权许可】

CC BY   
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