Silica-based iminodiacetic acid functionalized adsorbent for Ni hydrometallurgical extraction of nickeliferous laterite

Authors

  • Xin Li,

    Corresponding author
    1. Engineering and Technology Research Center for Inorgnic Type Ion-Exchange Resin, Henan University, Kaifeng 475004, People's Republic China
    2. School of the Chemistry and Environment, Jiaying University, Meizhou 514015, People's Republic China
    • Engineering and Technology Research Center for Inorgnic Type Ion-Exchange Resin, Henan University, Kaifeng 475004, People's Republic China===

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  • Baohua Li,

    1. Engineering and Technology Research Center for Inorgnic Type Ion-Exchange Resin, Henan University, Kaifeng 475004, People's Republic China
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  • Shan Wu,

    1. Engineering and Technology Research Center for Inorgnic Type Ion-Exchange Resin, Henan University, Kaifeng 475004, People's Republic China
    2. School of the Chemistry and Environment, Jiaying University, Meizhou 514015, People's Republic China
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  • Jingbing Li,

    1. Engineering and Technology Research Center for Inorgnic Type Ion-Exchange Resin, Henan University, Kaifeng 475004, People's Republic China
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  • Qitai Xu,

    1. Engineering and Technology Research Center for Inorgnic Type Ion-Exchange Resin, Henan University, Kaifeng 475004, People's Republic China
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  • Zhiqiang Yang,

    1. Jinchuan Group Limited, Jinchang 737100, People's Republic China
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  • Yuqiang Liu,

    1. Jinchuan Group Limited, Jinchang 737100, People's Republic China
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  • Shaohua Wang,

    1. Jinchuan Group Limited, Jinchang 737100, People's Republic China
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  • Dongsheng Chen

    Corresponding author
    1. Engineering and Technology Research Center for Inorgnic Type Ion-Exchange Resin, Henan University, Kaifeng 475004, People's Republic China
    • Engineering and Technology Research Center for Inorgnic Type Ion-Exchange Resin, Henan University, Kaifeng 475004, People's Republic China===

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Abstract

A novel silica-based iminodiacetic acid functionalized adsorbent was fabricated and then used to nickel hydrometallurgical extraction for low-grade nickeliferous laterites. The surface morphology of the adsorbent was characterized by scanning electron microscopy. The adsorption experiment indicated a maximum nickel load capacity of about 0.45 mmol/g. Analysis of adsorption thermodynamic and kinetics revealed a spontaneous adsorption process driven by entropy increase, and limited by film diffusion. Semi-industrial scale column experiments revealed that the Ni2+ in the acidic leach liquor of low-grade nickeliferous laterites may be efficiently extracted by the iminodiacetic acid functionalized adsorbent, if the Fe3+ ions existing in the acidic leach liquor were previously reduced to be Fe2+ by sodium sulfite. This environmentally safe adsorbent may supplant the traditional solvent extraction process for low-grade nickeliferous laterites. © 2012 American Institute of Chemical Engineers AIChE J, 2012

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