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IEG 환경지질연구정보센터

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지구화학│기타

2010 추계지질과학연합학술발표회 초록집 249

Dissolution mechanism of LiMnO 4 adsorbent in various solutions

Mi-Hye Gong

1

․Hye-On Yoon

1,*

․Mi-Jin Jung

1

․ Jo-Ri Bae

1

․Kang-Sup Chung

2

․Byoung-Gyu Kim

2

1

Korea Basic Science Institute, [email protected]

2

Korea Institute of Geoscience & Mineral Resources

Ion-exchange-type lithium-manganese-oxide complex have been prepared in different chemical composition as well as molecular stoichiometry. In studying the efficiencies of highly functional inorganic adsorbents for selective ions such as lithium, the characterization of adsorption behavior as well as dissolution yield must carefully studied in various conditions including different chemical conditions. The technology for producing nano-sized LiMnO

4

compound through the gel-process was used during materials preparation. The solid state reaction method was also used based on the adsorbent synthesis technology of spinel type LiMn

2

O

4

. High performance adsorbents include ion exchange type lithium-manganese-oxide complex exhibit different behavior when exposed in various solutions such as seawater. The present study describes the kinetics of dissolution characteristics of inorganic ions, Mn, Li, from LiMnO

4

compound. During preparation of lithium adsorptive LiMnO

4

compound, different chemical process has been applied and therefore it was expected to behave differently while these adsorbents is exposed in real solution media such as seawater for lithium recovery process. Kinetic studies including changing physical condition temperature was carefully examined to check the stability as well as monitoring hazardous chemicals discharge from LiMnO

4

adsorbent. ICP-AES (Ultima 2C, JY), ICP-MS (DRC-ICP-MS, Perkin Elmer) were used for detailed analysis of ionic species and SEM-EDS was used for specific point analysis for each adsorbent used.

75

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