Adsorption of reactive dye on seawater-neutralised bauxite refinery residue

作者：de Souza Kelli Cristina; Pereira Antunes Maria Lucia; Couperthwaite Sara Jane; da Conceicao Fabiano Tomazini; de Barros Thalita Rangueri; Frost Ray^*

来源：Journal of Colloid and Interface Science, 2013, 396: 210-214.

DOI：10.1016/j.jcis.2013.01.011

• Seawater neutralised red mud
• Reactive Blue dye
• Thermal treatment
• Adsorption

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.

• 出版日期2013-4-15