Adsorption of a basic dye onto Esmegel clay

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Paula M. S. S. Luís (Author) FEUP; Cheng Chia-Yau (Author) FEUP; Rui A. R. Boaventura (Author) FEUP

Journal

Title: Environmental Engineering and Management Journal

Vol. 13 No. 2

Pages: 395-405

ISSN: 1582-9596

Publisher: Institutul Politehnic din Iasi

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Scientific classification

FOS: Engineering and technology

CORDIS: Technological sciences > Engineering > Chemical engineering

Associated Projects

LA 20 - PROJECTO ESTRATÉGICO - LA 20 - 2013-2014

Other information

Authenticus ID: P-009-QEQ

Abstract (EN): This study focus on the possibility of removing the basic textile dye Astrazon Blue FGGL 300% 03, from an aqueous solution, using Esmegel clay as adsorbent. The characterization of the adsorbent included the distribution of particle size, physical textural properties, chemical composition and determination of the point of zero charge. The equilibrium isotherms were determined at 20 and 30 degrees C, pH at 6.0 and 7.5 and adjusted to the Langmuir and Freundlich models, having the latter led to better fitness. The kinetic studies were conducted at various pH values (4.8, 6.5 and 8.0), temperatures (20, 30 and 50 degrees C) and initial dye concentrations (100, 120, 150 and 180 mg/L). The pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion models were used to describe the adsorption kinetics, but the experimental data were best fitted by the Elovich model. The intraparticle diffusion is involved in the process of adsorption (between 4 and 20 min), yet it is not the controlling step. The activation energy was calculated from the initial adsorption rate obtained from the adjustment to the Elovich model. Equilibrium and kinetic tests were also carried out using a simulated effluent containing the dye and a dyeing auxiliary product.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11