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http://dx.doi.org/10.5322/JESI.2014.23.6.1157

Preparation of PVC-D2EHPA beads by Immobilization of D2EHPA on Polyvinyl Chloride as Solid Phase Extractant and Removal Characteristics of Cu(II)  

Kam, Sang-Kyu (Department of Environmental Engineering, Jeju National University)
You, Hae-Na (Department of Chemical Engineering, Pukyong National University)
Lee, Dong-Hwan (Department of Chemistry, Dong Eui University)
Lee, Min-Gyu (Department of Chemical Engineering, Pukyong National University)
Publication Information
Journal of Environmental Science International / v.23, no.6, 2014 , pp. 1157-1163 More about this Journal
Abstract
The solid phase extractant (PVC-D2EHPA bead) was prepared by immobilizing di-2-ethylhexyl-phosphoric acid (D2EHPA) with polyvinyl chloride (PVC). The prepared PVC-D2EHPA beads were characterized by using fourier transform infrared spectrometer (FTIR) and scanning electron microscopy (SEM). The removal experiments of Cu(II) by PVC-D2EHPA beads conducted batchwise. The removal kinetics of Cu(II) was found to follow the pseudo-second-order model. The equilibrium data fitted well with Langmuir isotherm model and the maximum removal capacity was 2.6 mg/g at $20^{\circ}C$. The optimum pH region was in the range of 3.5 to 6. and the standard free energy (${\Delta}G^{\circ}$) was between -4.67~-4.98 kJ/mol, indicating the spontaneous nature of Cu(II) removal by PVC-D2EHPA beads.
Keywords
Di-2-ethylhexyl-phosphoric acid; Polyvinyl chloride; Solid phase extraction; Copper ion;
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