IJEP 41(1): 100-106 : Vol. 41 Issue. 1 (January 2021)
1. Jiwaji University, School of Studies in Environmental Science, Gwalior – 474 001, M.P., India
2. SMS Govt. Model Science College, Department of Botany, Gwalior – 474 009, M.P., India
Abstract
The ability of potato peel to act as biosorption medium in the removal of metal ions from aqueous solution was investigated. The adsorbent removal efficiency was determined as a function of contact time, initial metal ion concentration, pH and temperature. Potato peel was characterized by scanning electron microscopy (SEM) and Fourier transformed infrared spectroscopy (FTIR). FTIR results showed that the functional groups providing the active sites are carboxyl, hydroxyl and carbonyl groups. Results from the biosorption experiment showed that potato peel displays a good binding affinity with metals ions [Cr(VI) and Ni(II)] in the aqueous solution. The equilibrium profile fits with the Langmuir isotherm with a coefficient values of 0.93 and 0.99 for Ni(II) and Cr(VI) and Freundlich isotherm having coefficient values of 0.97 and 0.99 for Ni(II) and Cr(VI), respectively. The potato peel was found to be highly efficient in the removal of selected heavy metal ions.
Keywords
Biosorption, Potato peel, Heavy metals, Aqueous solution, Adsorption isotherm
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