Kinetics modelling of biosorption by algal biomass from binary metal solutions using batch contactors

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

V´ıtor J.P. Vilar (Autor) FEUP; Cidalia M.S. Botelho (Autor) FEUP; Rui A.R. Boaventura (Autor) FEUP

Revista

Título: Biochemical Engineering Journal

Vol. 38

Páginas: 319-325

ISSN: 1369-703X

Editora: Elsevier

Indexação

ISI Proceedings

ISI Web of Knowledge - 9 Citações

ISI Web of Science

Scopus - 12 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Outras Informações

ID Authenticus: P-004-0VZ

DOI: 10.1016/j.bej.2007.07.020

Abstract (EN): The biosorption from four binary metal solutions, Pb2+/Cu2+, Pb2+/Cd2+, Pb2+/Zn2+ and Cd2+/Zn2+, onto algae Gelidium, algal waste and composite material, at pH 5.3 and 20 degrees C, were studied in batch adsorber. A mass transfer model based on a one-dimensional intraparticle diffusion rate, combined with a binary Langmuir isotherm, was applied to describe the overall biosorption rate of binary metal solutions mixture in flat seaweed biomass. A good correlation has been found between mass transfer model and experimental data for all systems. Model equations were solved numerically yielding the metal ions homogeneous diffusion coefficients. The biosorbents showed a preference for sorbing Pb over Cd, Zn and Cu even for low lead initial concentrations. Cu and Ph show a similar competition for the binding sites, although a higher uptake was found for copper ions, due to the higher initial copper concentration.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7