Optimization of nickel biosorption by chemically modified brown macroalgae (Pelvetia canaliculata)

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Amit Bhatnagar (Author) Other; Vítor J. P. Vilar (Author) FEUP; Catarina Ferreira (Author) Other; Cidália M. S. Botelho (Author) FEUP; Rui A. R. Boaventura (Author) FEUP

Journal

Title: Chemical Engineering Journal

Vol. 193

Pages: 256-266

ISSN: 1385-8947

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 33 Citations

ISI Web of Science

Scopus - 49 Citations

INSPEC

Scientific classification

FOS: Engineering and technology > Environmental engineering

CORDIS: Technological sciences > Engineering > Chemical engineering

Associated Projects

LA 20 - Projeto Estratégico-LA 20 - 2011-2012

Other information

Authenticus ID: P-002-8YQ

DOI: 10.1016/j.cej.2012.04.037

Abstract (EN): In the present work, various forms of algae Pelvetia canaliculata were prepared by different chemical modifications, in order to get the best form of algae for the maximum uptake of nickel. Potentiometric titration revealed that the carboxyl groups were more abundant (3.9 mmol/g) as compared to hydroxyl groups (2.0 mmol/g) on the biosorbent surface. Fourier transform infrared (FUR) analysis of algae was done to identify the role of different functional groups present on algae surface during nickel biosorption. The protonated algae showed least sorption of nickel suggesting that after acid treatment, some of the binding sites were destroyed. Among the various forms of prepared algae. Na-algae prepared directly from raw algae (without protonation) showed highest uptake of nickel. The release of sodium ions during the uptake of nickel ions has shown that the current biosorption mechanism involves ion-exchange being a stoichiometrical ratio of 2:1 between sodium and nickel ions.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11