Magnesium-Doped Manganese Oxide with Lithium Ion-Sieve Property: Lithium Adsorption from Salt Lake Brine

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Abstract

Magnesium-doped lithium manganese oxides Li<i><sub>m</sub></i>Mg<i><sub>x</sub></i>Mn<sup>III</sup><i><sub>y</sub></i>Mn<sup>IV</sup><i><sub>z</sub></i>O<sub>4</sub> (0 < <i>x</i> ≤ 0.5) with cubic spinel structure were synthesized by a coprecipitation method followed by calcination at 450 °C in air. Protonated samples were obtained after treatment with HCl solution. Chemical stability is very important for lithium uptake in industry. We used 0.5 M HCl for desorption of lithium, then dissolution of Mn decreased from 5.8 wt % for a sample without Mg to 1.0 wt % for a Mg-doped sample (Mg/Mn = 0.33). Raw brine was collected from the Salars de Uyuni, Bolivia. The effects of magnesium-doping on lithium adsorptive properties of the protonated samples in NaHCO<sub>3</sub> containing brine were studied by a batch method. The results showed that lithium adsorptive capacity and chemical stability of the protonated samples increased with increase in Mg/Mn ratio. The regeneration of the sample with Mg/Mn = 0.33 up to 10 cycles showed good performance with lithium adsorptive capacity of 23–25 mg g<sup>−1</sup> at pH 6.6, and the dissolution of manganese ca. 0.25 wt % Mn.

Journal

  • Bulletin of the Chemical Society of Japan

    Bulletin of the Chemical Society of Japan 86(7), 850-855, 2013-07-15

    The Chemical Society of Japan

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Codes

  • NII Article ID (NAID)
    10031183249
  • NII NACSIS-CAT ID (NCID)
    AA00580132
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00092673
  • NDL Article ID
    024672035
  • NDL Call No.
    Z53-B35
  • Data Source
    CJP  NDL  J-STAGE 
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