Original Articles: 2015 Vol: 7 Issue: 7
Optimization and modeling of physico-chemical factors affecting the removal of copper from aqueous solutions using feathers of Dromaius novaehollandiae
To meet the constant challenge of maintaining the wholesomeness of water without pollutants, new biological material viz. feathers of Dromaius novaehollandiae (DNF) were used for the removal of copper ions. Batch studies were conducted to evaluate the adsorption capacity of the adsorbent with respect to variations in different parameters like contact time, pH, initial adsorbate concentration, adsorbent dosage and temperature by one variable at a time method. Adsorption equilibrium was found to be established by 70 min. The maximum uptake of copper ions was observed at pH 6.0 with an initial adsorbate concentration of 20mg/L and an adsorbent dosage of 0.5g. The pseudo first order and the pseudo second order models were applied to study the kinetics of the sorption process. The adsorption data were then correlated with the Langmuir, Freundlich and Temkin isotherm models. Thermodynamic parameters were calculated by Van’t Hoff equation and indicated that the process was spontaneous, irreversible and endothermic in nature. The adsorbent was characterized before and after adsorption by SEM – EDS, FTIR and XRD.