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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

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

Revista

Título: Chemical Engineering Journal

Vol. 193

Páginas: 256-266

ISSN: 1385-8947

Editora: Elsevier

Indexação

ISI Web of Knowledge - 33 Citações

ISI Web of Science

Scopus - 49 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia do ambiente

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Projetos Associados

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

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11