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Stability of [BMIM]HSO4 for using as additive during zinc electrowinning from acidic sulfate solution

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Abstract

The stability of ionic liquid additive 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO4) during zinc electrowinning from acidic sulfate solution was investigated by cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. Compared with the traditional industrial additives, gelatine and gum arabic, [BMIM]HSO4 has more excellent chemical and thermal stabilities. The inhibition effects of gelatine and gum arabic on the zinc electrocrystallization are observed to markedly weaken due to their part degradation after 12 h longtime successive electrolysis and high temperature (90 °C) treatments. In contrast, the activity of [BMIM]HSO4 is practically unaffected after 24 h longtime successive electrolysis and high temperature treatments. These results are corroborated with the corresponding morphological analysis of the cathodic deposits.

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Authors and Affiliations

  1. Key Laboratory of Ionic Liquids Metallurgy (Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology), Kunming, 650093, China

    Qi-bo Zhang  (张启波) & Yi-xin Hua  (华一新)

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  1. Qi-bo Zhang  (张启波)
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  2. Yi-xin Hua  (华一新)
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Correspondence to Qi-bo Zhang  (张启波).

Additional information

Foundation item: Project(2011FA009) supported by the Natural Science Foundation of Yunnan Province, China; Project(2011FZ020) supported by the Application Foundation Research of Yunnan Province, China

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Zhang, Qb., Hua, Yx. Stability of [BMIM]HSO4 for using as additive during zinc electrowinning from acidic sulfate solution. J. Cent. South Univ. 19, 2451–2457 (2012). https://doi.org/10.1007/s11771-012-1296-7

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  • DOI: https://doi.org/10.1007/s11771-012-1296-7

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