Selective Separation of Precious Metals using Biomass Materials

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  • Shimada Yukiko
    Department of Applied Chemistry, Graduate School of Engineering, Kyushu University
  • Niide Teppei
    Department of Applied Chemistry, Graduate School of Engineering, Kyushu University
  • Kubota Fukiko
    Department of Applied Chemistry, Graduate School of Engineering, Kyushu University
  • Kamiya Noriho
    Department of Applied Chemistry, Graduate School of Engineering, Kyushu University
  • Goto Masahiro
    Department of Applied Chemistry, Graduate School of Engineering, Kyushu University

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  • バイオマス性素材を利用した貴金属イオンの選択的分離
  • バイオマスセイ ソザイ オ リヨウ シタ キキンゾク イオン ノ センタクテキ ブンリ

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Abstract

Proteins are known to exhibit specific interactions with various metalions. In this study, we investigated two types of protein-rich biomass, chicken feather and hen eggshell membrane, as adsorbents for separation of precious metal ions. Precious metal ions such as Au(III), Pd(II) and Pt(IV) were selectively adsorbed on the biomass in the presence of various transition metal ions. The adsorption capacity of eggshell membrane was higher than that of feather. Adsorption of Au(III) on the eggshell membrane was prominent at a pH range below 5. The adsorption behavior was explained by the complexation of Au(III) ion with proteins in the eggshell membrane and it was affected by Au(III) ion species in the feed aqueous solutions.

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