Indian Journal of Advances in Chemical Science Volume: 5, Issue: 3, July 2017


ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)

DOI:  10.22607/IJACS.2017.503002



Research Article


      Branch Wastes of Grape Bushes as a Low-cost Adsorbent for Copper Ions Removal from Water Solutions    
Oktay Akperov*, Elchin Akperov, Rasmiya Mamedova, Humaya Gadimova
The branch wastes of grape bushes as adsorbent for copper (II) ions removal from water solutions was investigated. The equilibrium sorption data were fitted to Langmuir, Freundlich, Dubinin-Radushkevich (D-R) and Temkin isotherms. The coefficient of determination value of Langmuir equation was the highest (0.9994). The maximum monolayer sorption capacity is 3.47 mmol g−1. The mean of free energy was determined to be 3.26 kJ mol−1. The calculated value of heat of adsorption has been obtained 0.627 J mol−1. The kinetic data are better described by the pseudo-second model. The calculated values of the maximum sorption capacity from the pseudo-second order equation (3.16 mmol g−1) and from the D-R isotherm (3.145 mmol g−1) are well agreements with its experimentally found value (3.264 mmol g−1). The negative value of ΔH (–46.767 kJ mol−1) indicates exothermic nature of the adsorption process and the negative value of ΔS (–0.15 kJ mol−1K−1) indicates a decreased disorder during adsorption process.

Key words:  Adsorption, Branch wastes of grape bushes, Copper ions, Adsorption isotherms, Kinetics, Thermodynamic parameters.



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