Experiments on the simultaneous partitioning of divalent metal ions between sphalerite or garnet and 2M aqueous chloride solutions under supercritical conditions

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  • UCHIDA Etsuo
    Department of Resources and Environmental Engineering, Waseda University
  • FUKUMA Michiyuki
    Department of Resources and Environmental Engineering, Waseda University
  • SATO Fumitoshi
    Department of Resources and Environmental Engineering, Waseda University
  • ENDO Sho
    Department of Resources and Environmental Engineering, Waseda University

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Other Title
  • 超臨界条件下における閃亜鉛鉱およびザクロ石と２Ｍ塩化物水溶液間における２価金属イオンの同時分配実験
  • チョウリンカイ ジョウケン カ ニ オケル センアエンコウ オヨビ ザクロイシ ト 2M エンカブツ スイヨウエキ カン ニ オケル 2カ キンゾク イオン ノ ドウジ ブンパイ ジッケン

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Experiments on the simultaneous partitioning of divalent metal ions were performed in the systems (1) ZnS (sphalerite)−(Ni2+, Co2+, Fe2+, Mn2+, Cd2+)Cl2−H2O and (2) Mn3Al2Si3O12 (spessartine)−(Ni2+, Mg2+, Co2+, Zn2+, Fe2+, Ca2+)Cl2−H2O in the temperature range of 500 to 800°C at 1 kb. In the former system for ion partitioning in the 4-fold coordination, parabola-shaped PC-IR curves with a peak near Zn2+ were obtained and no anomaly was observed for Zn2+ and Ni2+ but Cd2+. In the latter system for ion partitioning in the 8-fold coordination, parabola-shaped PC-IR curves with a peak near Mn2+ were obtained, but Zn2+ deviates from such a trend and tends to concentrate into aqueous chloride solutions. The PC-IR curves for spessartine are gentle compared with those for sphalerite. The PC-IR curves both for spessartine and sphalerite become gentle with increasing temperature.

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