Removal of organic dyes by magnetic alginate beads.
Water Res
; 42(4-5): 1290-8, 2008 Feb.
Article
em En
| MEDLINE
| ID: mdl-17980401
ABSTRACT
This study deals with the development of a clean and safe process for water pollution remediation. We have synthesized a magnetic adsorbent in order to develop a solid-phase extraction process assisted by a magnetic field. To follow an 'ecoconception' approach, magnetic beads containing magnetic nanoparticles and activated carbon are prepared with a biopolymer extracted from algae, sodium alginate. The use of renewable bioresources of low cost and those disposable in large amount allows the development of a product with a low impact on the environment. The adsorption properties of activated carbon and magnetic properties of iron oxide nanoparticles are combined to produce an interesting magnetic composite. Synthesis and characterization of the magnetic beads have been reported. Their adsorption capacity was investigated by measuring the removal of two dyes (methylene blue and methyl orange) of different charges from aqueous solutions. The efficiency of the beads has been compared with that of non-encapsulated activated carbon. The effects of initial dye concentration, pH and calcium content of the beads have been studied. Adsorption kinetics experiments have been carried out and the data have been well fitted by a pseudo-second-order equation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Carbono
/
Compostos Férricos
/
Eliminação de Resíduos Líquidos
/
Corantes
/
Alginatos
/
Nanopartículas
Idioma:
En
Revista:
Water Res
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
França