Isotherm, Kinetics and Thermodynamic Study of Adsorption of Phthalocyanine and Azo Dyes by CoCl2 Doped Polyaniline

Abstract

In this work, CoCl2 doped polyaniline was prepared using chemical oxidation method and used as an effective adsorbent for the removal of industrial dyes reactive blue 21 and reactive red 180. The adsorption experiments were performed with the variation of initial concentrations of dyes, pH of the solution, weight of adsorbent, temperature and agitation speed. Isotherm analysis, evaluating the correlation coefficients by ANOVA technique, kinetic study and calculation of thermodynamic parameters are carried out. Furthermore, the adsorption density of dyes onto PANI-CoCl2 adsorbent is characterized by SEM and FTIR. This study is compared with other previous works to establish that PANI-CoCl2 is an efficient adsorbent to remove dye from aqueous solution.