INVESTIGADORES
FERREIRA Maria Lujan
artículos
Título:
Adsorption Of Alizarin, Eriochrome Blue Black R and Fluorescein Using Differents Iron Oxides As Adsorbents
Autor/es:
SILVINA PIRILLO; MARÍA LUJÁN FERREIRA; ELSA H. RUEDA
Revista:
INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH
Editorial:
American Chemical Society
Referencias:
Lugar: Washington; Año: 2007 vol. 46 p. 8255 - 8263
ISSN:
0888-5885
Resumen:
This work presents kinetic and thermodynamic analysis of the adsorption of three dyes: Alizarin, Eriochrome Blue Black R and Fluorescein onto goethite, Co-goethite and magnetite of medium BET surface area. The adsorption of the dyes on the oxides is fast. Fluorescein exhibits the lowest level adsorption for all adsorbents being the goethite the most efficient adsorbent when mg dye/g oxide is considered. The Langmuir isotherm is the most appropriate for describing the adsorption data for the following systems: Alizarin-magnetite, Eriochrome and Fluorescein with the three adsorbents. While Alizarin-goethite and Alizarin-Co-goethite show better fits with Freundlich isotherm. Molecular modelling using MM2 was used to analyze the steric effects on adsorption.
