Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Preparation of PVC-LMO Beads Using Dimethyl Sulfoxide Solvent and Adsorption Characteristics of Lithium Ions

다이메틸설폭시화물 용매를 사용한 PVC-LMO 비드의 제조와 리튬 이온 흡착 특성

  • 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)
  • Received : 2014.02.20
  • Accepted : 2014.04.08
  • Published : 2014.06.30
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Abstract

In this study, PVC-LMO beads were prepared by immobilizing lithium manganese oxide (LMO) with poly vinyl chloride (PVC) diluted in dimethyl sulfoxide (DMSO) solvent on behalf of N-methyl-2-pyrrolidone (NMP). XRD analysis confirmed that LMO was immobilized well in PVC-LMO beads. The diameter of PVC-LMO beads synthesized by DMSO was about 4 mm. The adsorption experiments of lithium ions by PVC-LMO beads were conducted batchwise. The maximum adsorption capacity obtained from Langmuir model was 21.31 mg/g. The adsorption characteristics of lithium ions by PVC-LMO beads was well described by the pseudo-second-order kinetic model. It was considered that the internal diffusion was the rate controlling step.

본 연구에서는 노말 메틸 피로리돈(N-methyl-2-pyrrolidone, NMP)을 대신하여 다이메틸설폭시화물(dimethyl sulfoxide, DMSO)을 용매로 사용하여 폴리염화비닐 (poly vinyl chloride, PVC)로 리튬망간산화물(lithium manganese oxide, LMO)를 고정화하여 PVC-LMO 비드를 제조하였다. XRD 분석을 통해 PVC-LMO 비드내에 LMO가 잘 고정화 된 것을 확인 하였다. 합성한 PVC-LMO 비드의 크기는 약 4 mm였다. PVC-LMO 비드에 의한 리튬이온 흡착 실험은 회분식으로 수행하였다. 랭뮤어 모델식으로 부터 구한 최대 흡착량은 21.31 mg/g였다. PVC-LMO 비드에 의한 리튬이온 흡착특성은 유사 2차 속도모델식으로 잘 설명되었으며, 내부확산 단계가 흡착속도 결정단계인 것으로 사료되었다.

Keywords

References

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