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- Title
REMOVAL EFFICIENCY OF POTATO PEELS AS A NEW BIOSORBENT MATERIAL FOR UPTAKE OF PB(II) CD(II) AND ZN(II) FROM THEIR AQUEOUS SOLUTIONS.
- Authors
Taha, G. M.; Arifien, A. E.; El-Nahas, S.
- Abstract
The biosorption ability of potato peels (as a new waste material obtained from commercial processing of potato chips factories) was investigated for removal of Pb(II), Cd(II) and Zn (II) from aqueous solutions. The adsorption of metal ions under investigation is strongly pH, contact time, initial metal ion concentration and temperature dependent, while adsorbent particle size independent. The percentage removals are 92, 75 and 42 % for Pb(II), Cd(II) and Zn(II), respectively at initial metal ion concentration of 100 mg/L and at room temperature. The removal follows the order of Pb(II) > Cd(II) > Zn(II). The adsorption equilibrium is achieved within 60min. The experimental data fitted both Freundlich and Langmuir isotherm models.The rate constant (the changes in the sorption of metal ions with time) of each metal ion was determined using pseudo first order and pseudo second order rate models. The obtained results follow the pseudo-second order model. The thermodynamic behavior of metal-potato peels systems were studied at different temperatures, 298, 313, 323 and 333 K. The obtained results show that the adsorption process is exothermic for the studied metal ions. Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM) of potato peels were done to illustrate the physicochemical nature for potato peels.
- Subjects
POTATO waste; METALS removal (Sewage purification); SOLUTION (Chemistry); SEWAGE purification; ADSORPTION (Chemistry); FOURIER transform infrared spectroscopy; METAL ions; PARTICLE size distribution
- Publication
Journal of Solid Waste Technology & Management, 2011, Vol 37, Issue 2, p128
- ISSN
1088-1697
- Publication type
Article
- DOI
10.5276/JSWTM.2011.128