Lead uptake by algae Gelidium and composite material particles in a packed bed column

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

Autores

Vıtor J.P. Vilar (Autor) FEUP; Cidália M.S. Botelho (Autor) FEUP; Rui A.R. Boaventura (Autor) FEUP

Revista

Título: Chemical Engineering Journal

Vol. 144

Páginas: 420-430

ISSN: 1385-8947

Editora: Elsevier

Indexação

ISI Proceedings

ISI Web of Knowledge - 16 Citações

ISI Web of Science

Scopus - 18 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas > Tecnologia > Tecnologia química

Outras Informações

ID Authenticus: P-003-V15

DOI: 10.1016/j.cej.2008.02.020

Abstract (EN): Biosorption of lead ions was studied ill a flow-through column packed with red algae Gelidium and a composite material (industrial algal waste from the agar extraction process immobilized with polyacrylonitrile). Experiments were performed in order to study the effect of important design parameters such as now rate and influent pH. The breakthrough curves for lead and proton concentrations were obtained ill Saturation and elution studies. Macroscopically. when the flow rate increases, the residence time in the bed decreases, and the column saturation is faster achieved and the sharpness of the breakthrough curves increases. Microscopically, increasing the flow rate, the film diffusion resistance decreases. For higher values of the influent pH, the breakthrough time increases, clue to the greater metal uptake capacity at the equilibrium. Considering the effectiveness of lead desorption from loaded biomass, we concluded that desorption was 100% effective and rapid, even for high values of the solid to liquid ratio, leading to high values of the concentration factor. The column packed with composite material was operated in two consecutive adsorption-desorption cycles, without any changes in the metal uptake capacity. A mathematical model based oil external and intraparticle mass transfer was developed to simulate the breakthrough curves in the adsorption and desorption processes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11