Adsorptive Removal of Single and Double Azo Dyes by Pani-CuCl2 Composite- Isotherm, Thermo-dynamic and Kinetic Studies

IJEP 42(7): 831-840 : Vol. 42 Issue. 7 (July 2022)

D. Anusha, T. Vimala* and U.D. Lingeswari

Seethalakshmi Ramaswami College, Tiruchirappalli – 620 002, Tamil Nadu, India


This research article aims to establish the equilibrium adsorption behaviour of reactive orange 107 and reactive black 5 from aqueous solutions onto 8% PANI-CuCl2. A batch process was adopted and the effects of different parameters, such as contact time, adsorbent dosage, adsorbate concentration and agitation speed on adsorption efficiency at pH 6.6 and 4.4, respectively under a constant temperature of 303 K were studied. The spontaneous and exothermic nature was exemplified by the thermodynamic study. 8% PANI-CuCl2 was characterized by FTIR and SEM. The equilibrium data were analysed using Langmuir, Freundlich and Temkin adsorption isotherm models. The adsorption can be best described by the pseudo-second-order kinetic model and Langmuir isotherm. The adsorbent is capable of decolourising the dye in considerable amount by simple exposure to sunlight.


Adsorption, Kinetics, Thermodynamic study


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