Logo do repositório
 

Study of biosorption of rare earth metals (La, Nd, Eu, Gd) by Sargassum sp. biomass in batch systems: Physicochemical evaluation of kinetics and adsorption models

Carregando...
Imagem de Miniatura

Orientador

Coorientador

Pós-graduação

Curso de graduação

Título da Revista

ISSN da Revista

Título de Volume

Editor

Tipo

Trabalho apresentado em evento

Direito de acesso

Acesso abertoAcesso Aberto

Resumo

This work evaluated kinetic and adsorption physicochemical models for the biosorption process of lanthanum, neodymium, europium, and gadolinium by Sargassum sp. in batch systems. The results showed: (a) the pseudo-second order kinetic model was the best approximation for the experimental data with the metal adsorption initial velocity parameter in 0.042-0.055 mmol.g -1.min-1 (La < Nd < Gd < Eu); (b) the Langmuir adsorption model presented adequate correlation with maximum metal uptake at 0.60-0.70 mmol g-1 (Eu < La < Gd < Nd) and the metal-biomass affinity parameter showed distinct values (Gd < Nd < Eu < La: 183.1, 192.5, 678.3, and 837.3 L g-1, respectively); and (c) preliminarily, the kinetics and adsorption evaluation did not reveal a well-defined metal selectivity behavior for the RE biosorption in Sargassum sp., but they indicate a possible partition among RE studied. © (2009) Trans Tech Publications.

Descrição

Palavras-chave

Biosorption, Physicochemical modeling, Rare earth metals, Sargassum sp., Adsorption model, Batch systems, Best approximations, Biosorption process, Experimental data, Initial velocities, Langmuir adsorption model, Metal adsorption, Metal selectivity, Metal uptake, Physicochemical model, Pseudo-second-order kinetic models, Sargassum sp, Adsorption, Biomass, Europium, Gadolinium, Lanthanum, Metals, Neodymium, Rare earths, Metal recovery

Idioma

Inglês

Citação

Advanced Materials Research, v. 71-73, p. 605-608.

Itens relacionados

Financiadores

Unidades

Unidade
Instituto de Química
IQAR
Campus: Araraquara


Departamentos

Cursos de graduação

Programas de pós-graduação