Removal of rhodamine B using iron-pillared bentonite.
J Hazard Mater
; 186(2-3): 1118-23, 2011 Feb 28.
Article
em En
| MEDLINE
| ID: mdl-21168960
ABSTRACT
The iron-pillared bentonite (Fe-Ben) was prepared by ion-exchange using the natural bentonite (GZ-Ben) from Gaozhou, China, at room temperature without calcination. Both Fe-Ben and GZ-Ben were characterized by X-ray diffraction, N(2) adsorption and Fourier transform infrared spectroscopy. The results show that the d(001) value and surface area of the bentonite material increased after iron pillaring. Fe-Ben adsorbed much more Rhodamine B (RhB) than GZ-Ben, which can be ascribed to the special surface properties and large surface area of Fe-Ben. The optimum pH value for the adsorption of RhB on Fe-Ben is 5.0. The adsorption of RhB onto Fe-Ben can be well described by the pseudo-second-order kinetic model and the intraparticle diffusion kinetic model. The adsorption isotherm of RhB onto Fe-Ben matches well with the Langmuir model.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Rodaminas
/
Bentonita
/
Corantes Fluorescentes
/
Ferro
Tipo de estudo:
Risk_factors_studies
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article