Adsorption of reactive dye on seawater-neutralised bauxite refinery residue

Author(s)

de Souza, Kelli Cristina ^[1] ; Pereira Antunes, Maria Lucia ^[1] ; Couperthwaite, Sara Jane ^[2] ; da Conceicao, Fabiano Tomazini ^[3] ; de Barros, Thalita Rangueri ^[1] ; Frost, Ray ^[2]

Affiliation

^[1] Univ Estadual Paulista, UNESP, BR-18017180 Sorocaba, SP - Brazil

^[2] Queensland Univ Technol, Sch Chem Phys & Mech Engn, Fac Sci & Engn, Brisbane, Qld 4001 - Australia

^[3] Univ Estadual Paulista, UNESP, Ins Geociencias & Ciencias Exatas, BR-13506900 Rio Claro, SP - Brazil

• Document type: Journal article
• Source: Journal of Colloid and Interface Science; v. 396, p. 210-214, APR 15 2013.
• Web of Science Citations: 17

Abstract

This investigation has demonstrated the need for thermal treatment of seawater neutralised red mud (SWRM) in order to obtain reasonable adsorption of Reactive Blue dye 19 (RB 19). Thermal treatment results in a greater surface area, which results in an increased adsorption capacity due to more available adsorption sites. Adsorption of RB 19 has been found to be best achieved in acidic conditions using SWNRM400 (heated to 400 degrees C) with an adsorption capacity of 416.7 mg/g compared to 250.0 mg/g for untreated SWNRM. Kinetic studies indicate a pseudosecond-order reaction mechanism is responsible for the adsorption of RB 19 using SWNRM, which indicates adsorption occurs by electrostatic interactions. (C) 2013 Elsevier Inc. All rights reserved. (AU)

• FAPESP's process: 10/03459-6 - Study of red mud activated by chemical and thermal treatment as adsorbent of textile dyes
• Grantee: Kelli Cristina de Souza
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 09/02374-0 - Characterization of Brazilian red mud and evaluation of its dye adsorption potential
• Grantee: Maria Lúcia Pereira Antunes
• Support Opportunities: Regular Research Grants