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KMID : 1024520140230061157
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Journal of the Environmental Sciences
2014 Volume.23 No. 6 p.1157 ~ p.1163
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Preparation of PVC-D2EHPA beads by Immobilization of D2EHPA on Polyvinyl Chloride as Solid Phase Extractant and Removal Characteristics of Cu(II)
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Kam Sang-Kyu
You Hae-Na
Lee Dong-Hwan
Lee Min-Gyu
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Abstract
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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℃. The optimum pH region was in the range of 3.5 to 6. and the standard free
energy (△Go) was between ?4.67 ∼?4.98 kJ/mol, indicating the spontaneous nature of Cu(II) removal by
PVC-D2EHPA beads.
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KEYWORD
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Di-2-ethylhexyl-phosphoric acid, Polyvinyl chloride, Solid phase extraction, Copper ion
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