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The aim of this study was to investigate the Cd(II) removal using agricultural byproduct corncob adsorbent in the aqueous solution. Effect of various process parameters, viz., initial Cd(II) concentration, pH and adsorbent dose has been studied for the removal of Cd(II). Batch experiments were carried out at various pH (2-7), adsorbent dose (2.5-20 g), Cd(II) concentration (5-500 mg/L) for a contact time of 60 min. The FT-IR (Fourier transform infrared spectroscopy) spectra of the corncob indicated that the carbonyl and carboxylic groups were major binding sites with Cd(II) ions. Corncob removed successfully 99% of the Cd(II) ions in the aqueous solution at pH 6. The adsorption process was fast and isotherm data better fit to the Langmuir isotherm than the Freundlich isotherm models. In addition, thermodynamic parameters (△G, △H, and △S)were also calculated from data obtained from experiments performed to study the effect of temperatures. The negative values of change in Gibbs free nergy indicate the feasibility and spontaneous nature of the adsorptive treatment. Taking all the above results into consideration, corncob is an inexpensive and excellent adsorbent.
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참고문헌 (9)
참고문헌 신청
Krika, F. / 2016 / Adsorptive removal of cadmium from aqueous solution by cork biomass:Equilibrium, dynamic and thermodynamic studies / Arabian J. Chem 9(S2):s1077~s1083
최희정 / 2016 / 메틸 에스테르화한 견운모를 이용한 수용액의 Pb와 Cd의 제거 특성 / 한국수처리학회지 24(4):87~100
Garg, U. / 2008 / Removal of cadmium (II) from aqueous solutions by adsorption on agricultural waste biomass / J. Hazar. Mater 154(1-3):1149~1157
Zheng, W. / 2008 / Adsorption removal of cadmium and copper from aqueous solution by areca—A food waste / J. Hazar. Mater 157(2?3):490~495
최희정 / 2017 / 옥수수속대(Corncob)를 이용한 수용액의 Cu(II) 제거 / 한국수처리학회지 25(2):61~72
최희정 / 2016 / 메틸 에스테르화한 견운모를 이용한 수용액의 Pb와 Cd의 제거 특성 / 한국수처리학회지 24(4):87~100
Garg, U. / 2008 / Removal of cadmium (II) from aqueous solutions by adsorption on agricultural waste biomass / J. Hazar. Mater 154(1-3):1149~1157
Zheng, W. / 2008 / Adsorption removal of cadmium and copper from aqueous solution by areca—A food waste / J. Hazar. Mater 157(2?3):490~495
최희정 / 2017 / 옥수수속대(Corncob)를 이용한 수용액의 Cu(II) 제거 / 한국수처리학회지 25(2):61~72
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