Adsorption of reactive dye on seawater-neutralised bauxite refinery residue

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:396

Article

de Souza, Kelli Cristina¹  Pereira Antunes, Maria Lucia¹  Couperthwaite, Sara Jane³  da Conceicao, Fabiano Tomazini²  de Barros, Thalita Rangueri¹  Frost, Ray³ 

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

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

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

关键词: Seawater neutralised red mud;    Reactive Blue dye;    Thermal treatment;    Adsorption;   

DOI  :  10.1016/j.jcis.2013.01.011

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free