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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)

고체상 추출제로서 Polyvinyl Chloride에 D2EHPA를 고정화한 PVC-D2EHPA의 제조와 Cu(II) 제거 특성

Kam, Sang-Kyu;You, Hae-Na;Lee, Dong-Hwan;Lee, Min-Gyu
감상규;유해나;이동환;이민규

  • Received : 2014.04.16
  • Accepted : 2014.05.28
  • Published : 2014.06.30

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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