마그네슘 및 아연 置換型 망간 酸化物 吸着劑의 合成 및 海水로부터 리튬의 吸着特性
Synthesis of Mg and Zn Substituted Manganese Oxide Adsorbents and Their Lithium Adsorption Properties in Seawater
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해수에서 리튬에 대한 선택적인 흡착특성을 나타내는 이온교환형 망간산화물계 흡착제의 제조와 이의 흡착특성을 조사하였다. 고상반응을 이용하여 망간의 일부가 마그네슘 또는 아연으로 치환된 LiMe0.5Mn1.5O4(Me =Mg, Zn) 전구체를 합성하였으며 산처리를 통하여 HMg0.5Mn1.5O4와 HZn0.5Mn1.5O4 흡착제를 제조하였다. 최적 산처리 조건은 LiMg0.5Mn1.5O4 전구체의 경우 염산용액농도 0.5M, 산처리 횟수 3회 이었으며 LiZn0.5Mn1.5O4 전구체에 대해서는 염산농도 0.3M, 산처리 횟수 3회 이었다. HMg0.5Mn1.5O4와 HZn0.5Mn1.5O4 흡착제에 의한 리튬의 흡착은 Freundlich 식을 만족하였으며 인공해수로부터 리튬의 최대 흡착량은 각각 30.3 mg/g과 33.1 mg/g이었다. 리튬의 농도가 0.2 mg/L로 조절된 인공해수로부터 HMg0.5Mn1.5O4 및 HZn0.5Mn1.5O4 흡착제에 의한 리튬의 흡착효율은 각각 88%와 89%로서 리튬에 대한 높은 흡착능을 나타내었다.
Abstract
Ion-exchange type manganese oxide adsorbents for the selective adsorption of Li from seawater were prepared and their properties examined. LiMe0.5Mn1.5O4(Me=Mg, Zn) precursors in which part of Mn was substituted by Mg or Zn were synthesized by the solid-state reaction. The adsorbents, HMg0.5Mn1.5O4 and HZn0.5Mn1.5O4, were fabricated by acid treatment. The optimum acid treatment was obtained at hydrochroic acid concentration of 0.5M and 0.3M for LiMg0.5Mn1.5O4 and LiZn0.5Mn1.5O4 precursors, respectively. The optimum number of acid treatments were 3 times in both cases. The adsorption of Li by HMg0.5Mn1.5O4 and HZn0.5Mn1.5O4 adsorbents followed the Freundlich equation and the maximum adsorption of Li in artificial seawater was 30.3 mg/g and 33.1 mg/g, respectively. The adsorption efficiency of Li by HMg0.5Mn1.5O4 and HZn0.5Mn1.5O4 adsorbents in artificial seawater which Li concentration was adjusted to 0.2 mg/L was high as 88% and 89%.
참고문헌 (18)
- "DV-X 분자궤도법을 이용한 리튬이온 흡착제용 스피넬형 망간산화물의 전자상태에 관한 연구", 12(4), pp.274~278 (2002)
- "이온교환형 망간산화물 흡착제를 이용한 해수로부터 리튬 회수", 40(6), pp.402~408 (2003)
- "화학과 공업", 42, pp.1224~ (1989)
- "A Review of Extractive Processes for Lithium from Ores and Brines", 3, pp.305~313 (1978)
- "A New Type of Manganese Oxide Derived from Li1.6Mn1.6O4 and Its Lithium Ion-Sieve Properties", ka m(h 2 0.5h2o), pp.3151~3157 (2000)
- "Lithium Production in Chile's Salar de Atacama", pp.27~33 (1984)
- "Advanced Battery Materials Resource Requirement Survey for Electric Vehicle Applications"
- "Lithium Reserves and Resources", 3, pp.379~385 (1978)
- "Extraction of Lithium from the Dead Sea", 6, pp.269~275 (1981)
- "Li+ Extraction", Insertion with Spinel-Type Lithium Manganese Oxides. Characterization of Redox-Type and Ion-Exchange- Type Sites, 1992pp.1861-1867., pp.ka 8(h), ~
- "Li+ and Mg2+ Extraction and Li+ Insertion Reactions LiMg0.5 Mn1.5O4 Spinel in the Aqueous Phase", ka 5(h), pp.311~316 (1993)
- "Li+ Extraction", Insertion Reactions LiZn0.5Mn1.5O4 Spinel in the Aqueous Phase, 1995, pp.ka 7(h), 379~384
- "1992 Studies on Recovery of Lithium from Sea water by Manganese Oxide Adsorbent", pp.2~3
- "Lithium in Minerals Yearbook Metals and Minerals, U.S. Geological Survey" (2003), Department of the Interior
- "Recovery of Lithium from Seawater by Manganese Oxide Adsorbent", 21, pp.755~766 (1986)
- "Recovery of Lithium from Sea Water", 42, pp.219~227 (1989)
- "Lithium Production from Searles Valley Lithium Resources and Requirements by the Year 2000", pp.79~88 (1976)
- "The Recovery of Lithium from Geothermal Water in the Hatchobaru Area of Kyushu", 56, pp.2490~2498 (1983)