Preliminary study on the adsorption of the cationic dye astrazon red by a portuguese bentonite

• Type: Article in International Conference Proceedings Book
• Date: 2006

Authors

Sílvia C. R. Santos (Author) FEUP; Rui A. R. Boaventura (Author) FEUP; Álvaro F. M. Oliveira (Author) Other

Conference proceedings International

Title: Combined and Hybrid Adsorbents: Fundamentals and Applications

Pages: 111-116

NATO Advanced Research Workshop on Combined and Hybrid Adsorbents - Fundamentals and Applications

Kiev, UKRAINE, SEP 15-17, 2005

Indexing

ISI Web of Knowledge - 1 Citation

Other information

Authenticus ID: P-004-PBX

DOI: 10.1007/1-4020-5172-7_13

Abstract (EN): The adsorption of Astrazon Red (C.I. Basic Red 46) in aqueous solution by a bentonite clay from Benavila, Portugal, was studied. The bentonite sample was mainly composed of montmorillonite, Na-Feldspar and calcite (XRD analysis). The texture characteristics were determined by Hg and He porosimetry and the specific surface area by the methylene blue adsorption method. A kinetic experiment was carried out at 15 degrees C to determine the time required to reach equilibrium. Experimental data were well described by the pseudo-second order kinetic model. Adsorption equilibrium isotherms were determined at different temperatures and the results fitted to Langmuir and Freundlich models. According to Langmuir model, the adsorption capacities were 141.0, 148.7 and 157.8 mg/g at 15, 25 and 35 degrees C, respectively.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6