Thermodynamic studies on removal of reactive blue 19 dye on cross-linked chitosan/oil palm ash composite beads

Abstract

The effect of temperature on adsorption of reactive blue 19 (RB19) by cross-linked chitosan/oil palm ash composite beads was investigated. Temperature studied from range 30 to 50 0C. It was observed that the uptake of this dye increased with increasing in temperature. Results revealed that sorptions of reactive blue 19 (RB19) on cross-linked chitosan/oil palm ash composite beads was endotermic in nature. Thermodynamics parameters such as entrophy change, entalphy change and Gibb's free energy were found out to be 166.20 J/mol.K, 46.21 kJ/mol and -3.86 to - 7.15 kJ/mol, respectively.