Waste material, hen feather, a biosorbent was successfully utilized in removing a water-soluble hazardous Malachite Green Dye. The study incorporates the effect of parameters time, initial concentration, adsorbent dosage, pH, temperature. The adsorption data validates up to 99.80%of the malachite green dye was biosorbed at 303 K demonstrating the biosorbent potential of the waste (hen feathers)for the removal of malachite green dye. The results indicated that the maximum biosorbent removal can be achieved at 4 of pH value and equilibrium can be reached in 60 minutes. The Freundlich Isotherm model provides better desorption for the adsorption equilibrium when compared with the Langmuir Equation in the conditions of the present study. Based on these isotherms, Thermodynamic parameters like Gibbs free energy change in enthalpy, and entropy were calculated. Kinetics of the ongoing adsorption was also monitored. The specific rate constant for the involved process was calculated at different temperatures. Kinetic measurements suggest 2nd order adsorption kinetics. This work showed that the biosorbent hen feathers a waste material can be effectively used for the removal of Malachite Green Dye from its aqueous solutions.
