Paper Title:
Preparation of Ion-Sieve Type (H)[M0.5Mn1.5]O4 (M=Mg, Zn) and their Lithium Adsorption Properties in Seawater
  Abstract

Ion-sieve type manganese oxide spinels for the selective adsorption of lithium(Li) from seawater were prepared and their properties were examined. LiM0.5Mn1.5O4 (M=Mg, Zn) precursors, in which part of manganese(Mn) was substituted with magnesium(Mg) or zinc(Zn), were synthesized through the solid-state reaction. The adsorbents, HM0.5Mn1.5O4 (M=Mg, Zn) were derived from LiM0.5Mn1.5O4 (M=Mg, Zn) by acid treatment. The optimum acid treatment was obtained at hydrochloric acid concentration of 0.5M and 0.3M for LiMg0.5Mn1.5O4 and LiZn0.5Mn1.5O4 precursors, respectively. Both cases required thrice-conducted acid treatments for the best results. 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, in which Li concentration was adjusted to 0.2 mg/L, was as high as 88% and 89%.

  Info
Periodical
Solid State Phenomena (Volumes 124-126)
Edited by
Byung Tae Ahn, Hyeongtag Jeon, Bo Young Hur, Kibae Kim and Jong Wan Park
Pages
739-742
DOI
10.4028/www.scientific.net/SSP.124-126.739
Citation
K. S. Chung, M. A. Kim, H. Lee, Y. J. Suh, D. S. Kil, B.C. Dave, J. C. Lee, "Preparation of Ion-Sieve Type (H)[M0.5Mn1.5]O4 (M=Mg, Zn) and their Lithium Adsorption Properties in Seawater", Solid State Phenomena, Vols. 124-126, pp. 739-742, 2007
Online since
June 2007
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$32.00
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