International Journal of Chemical Studies
Vol. 1, Issue 6 (2014)
Adsorption Studies of Fly Ash for Removing Cu(II) from Aqueous Solution
Author(s): Kumar Saroj, Mishra A.K., Singh Dhanesh, Upadhyay M, Kumar Sujata
Abstract: In the present study, removal characteristics of Cu (II) ion from waste water using fly ash – a low cost adsorbent has been studied. Experiments were carried out by batch mode. The effect of contact time, initial metal ion concentration, pH, temperature and particle size of the adsorbent on adsorption have been investigated. The adsorption data have been analyzed and discussed by using Lagergren-pseudo-first-order and pseudo-second-order kinetic model. It was observed that the kinetic data follows pseudo-second-order kinetic model. Langmuir adsorption isotherm and Freundlich adsorption isotherm were applied to the equilibrium data and it was found that both models are applicable. Using modified Arrhenius equation, activation energy was calculated and found to be positive which indicates the endothermic nature of adsorption. Sticking probability of the process have been calculated and it has been observed that its value is << 1, indicating the high probability of adsorption. Thermodynamic parameters such as change in enthalpy, change in entropy and change in free energy have been calculated and it has been observed that the process is feasible, spontaneous and endothermic in nature.
Fig. 1: Before adsorption (45µ)
Pages: 42-52 | 1088 Views 15 Downloads
How to cite this article:
Kumar Saroj, Mishra A.K., Singh Dhanesh, Upadhyay M, Kumar Sujata. Adsorption Studies of Fly Ash for Removing Cu(II) from Aqueous Solution. Int J Chem Stud 2014;1(6):42-52.