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ABSTRACT
In this study, high capacity Chestnut shell, a waste product from the chestnut sugar production industry, was successfully applied to remove Pb (II) and Cd (II) ions from aqueous solutions. Maximum adsorption capacities were found as 541.25 mg/g and 75.86 mg/g for Pb(II), and Cd(II) respectively. Several important parameters influencing the adsorption of Pb(II) and Cd(II) ions such as contact time, pH, temperature and effect of metal concentration were investigated systematically by batch experiments. Langmuir and Freundlich adsorption models were used to describe adsorption isotherms and constants. The thermodynamic parameters, such as standard free energy (ΔG°), standard enthalpy (ΔH°), and standard entropy (ΔS°), of the adsorption process were calculated. The adsorbents were characterised by scanning electron microscopy. It has been observed from the experimental results that in case of both Cd (II) and Pb (II), pseudo 2nd order kinetic model. From the results, Chestnut Shell are considered as an effective, low cost and environmental friendly adsorbent for the removal of Pb (II) and Cd (II) from wastewater.
KEYWORDS:
Acknowledgements
This study was supported by Celal Bayar University Research Foundation Project no. 2015-003.
Disclosure statement
No potential conflict of interest was reported by the authors.
Notes on contributors
Sema Çetinkaya studies heavy metal adsorption. She is chemistry master graduate.
Şerif Targan currently Assoc. Prof. Dr. at the Manisa CElal Bayar University. He studies heavy metal removal from aqueous solutions by natural adsorbents.
V. Nüket Tirtom is currently assoc. Prof. Dr. at Manisa Celal Bayar University. She studies heavy metal adsorption and determination. She also studies flow injection analyses.