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DOI : 10.17640/KSWST.2017.25.2.61 ,    Vol.25, No.2, 61 ~ 73, 2017
Title
Application of Corncob for Treatment of Cu(II) in Aqueous Solution
최희정 Hee-jeong Choi
Abstract
The aim of this study was to investigate the Cu(II) removal using agricultural byproduct corncob adsorbent in the aqueous solution. The corncob was then successfully utilized for efficient removal of Cu(II) ions from aqueous solutions. Batch reactor studies showed that increase in sorptive pH, contact time, initial concentration and dose of adsorbents significantly favored the sorption of Cu(II). The equilibrium data obtained at various initial concentrations reasonably fit well with the Langmuir adsorption isotherm. The adsorption process was fast and the kinetic data fit better to the Pseudo-second order kinetic model. Cu(II) removal was found to be spontaneous and uptake process was endothermic in nature. Further, the intra-particle diffusion was found to be the rate-limiting step in the sorption of Cu(II). Various parametric studies enabled to discuss the sorption mechanism of these contaminants at the solid/solution interface. Taking all the above results into consideration, corncob is an inexpensive and excellent adsorbent. In addition, corncob does not contaminate treated water, which can be recycled to reduce not only the cost and the demand for water but also the extra operational costs for reusing water.
Key Words
Adsorbent, Adsorption, Agricultural byproduct, Corncob, Heavy metal
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