Adsorption of Reactive Blue 21 from aqueous solutions onto clay, activated clay, and modified clay

作者：Vanaamudan Ageetha; Pathan Naznin; Pamidimukkala Padmaja^*

来源：Desalination and Water Treatment, 2014, 52(7-9): 1589-1599.

DOI：10.1080/19443994.2013.789405

• Activated clay
• Adsorption
• Clay
• Modified clay
• Reactive Blue

The objectives of this work were to investigate the adsorption of Reactive Blue 21(RB21) onto clay(C), activated clay (AC), and modified clay (MC). The adsorbents were characterized by FTIR, XRD, TGA, and BET. Batch studies were carried out to evaluate parameters affecting adsorption such as contact time, pH, sorbent dose, and temperature. Among the kinetic models tested, the adsorption kinetics was best described by the pseudo-second-order equation. The data fitted well with Freundlich, Langmuir, Temkin, and Halsey isotherms. The reusability of the adsorbents using 1N NaOH for over three cycles indicates the economic significance of these materials as adsorbents.

• 出版日期2014-2-23