Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Synthesis of Lithium Manganese Oxide by Wet Mixing and its Removal Characteristic of Lithium Ion

습식혼합에 의한 리튬망간 산화물의 합성과 리튬이온 제거특성

  • You, Hae-Na (Department of Chemical Engineering, Pukyong National University) ;
  • Lee, Dong-Hwan (Department of Chemistry, Dong Eui University) ;
  • Lee, Min-Gyn (Department of Chemical Engineering, Pukyong National University)
  • Received : 2013.08.02
  • Accepted : 2013.09.25
  • Published : 2013.12.31
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Abstract

In this paper, the wet mixing method was introduced to prepare spinel lithium manganese oxide (LMO) with $Li_2CO_3$ and $MnCO_3$. The physical properties of the resulting lithium manganese oxide were characterized by the XRD and SEM. The adsorption properties of LMO for $Li^+$ were investigated by batch methods. The maximum adsorption capacity of lithium was calculated from Langmuir isotherm and found to be 27.25 mg/g. The LMO are found to have a remarkable lithium ion-sieve property with distribution coefficients ($K_d$) in the order of $Ca^{2+}$ < $K^+$ < $Na^+$ < $Mg^{2+}$ < $Li^+$, which is promising in the lithium extraction from seawater.

본 연구에서는 탄산리튬과 탄산망간을 사용하여 습식혼합방법으로 스피넬 리튬망간 산화물(LMO)을 합성하였다. 합성한 리튬망간 산화물의 물리적인 특성은 X-선 회절 분석기(X-ray diffraction, XRD)와 주사전자현미경(scanning electron microscopy, SEM) 사용하여 분석하였다. 회분식 실험을 통해 LMO의 리튬이온에 대한 흡착특성을 살펴보았다. Langmuir 흡착 등온식으로부터 구한 리튬의 최대흡착량은 27.21 mg/g였다. LMO는 뛰어난 리튬 이온체의 특성을 가지고 있었으며, $Ca^{2+}$ < $K^+$ < $Na^+$ < $Mg^{2+}$ < $Li^+$ 순서로 분배계수($K_d$)가 나타나 해수로부터 리튬을 회수하는데 용이할 것으로 사료된다.

Keywords

References

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