Uptake of Reactive Black 5 by pumice and walnut activated carbon: Chemistry and adsorption mechanisms

作者：Heibati Behzad; Rodriguez Couto Susana; Amrane Abdeltif; Rafatullah Mohd; Hawari Alaa; Al Ghouti Mohammad A^*

来源：Journal of Industrial and Engineering Chemistry, 2014, 20(5): 2939-2947.

DOI：10.1016/j.jiec.2013.10.063

• Azo dyes
• Pumice and walnut wood activated carbon
• Isotherm and kinetic models
• Adsorption mechanisms

The potential of using pumice and walnut wood activated carbon as low-cost adsorbents for the removal of the diazo dye Reactive Black 5 (RB5) from aqueous solutions was investigated. The Langmuir isotherm fit to the data specified the presence of two different natures of adsorption sites with different binding energies on the AC-W surface. Kinetic modelling showed that the adsorption behaviour and mechanism of RB5 for both adsorbents is believed to happen via surface adsorption followed by diffusion into the pores of the AC-W and pumice. The main adsorption mechanisms are hydrogen bonding, electrostatic bonding and n-pi interactions.

• 出版日期2014-9-25