Electrolyte Solution Model for Seawater

DOI Web Site 13 References
  • Maeda Kouji
    School of Mechanical System Engineering, Environmental Energy Engineering Group, University of Hyogo
  • Komoto Yoshinori
    School of Mechanical System Engineering, Environmental Energy Engineering Group, University of Hyogo
  • Kuramochi Hidetoshi
    Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies
  • Asakuma Yusuke
    School of Mechanical System Engineering, Environmental Energy Engineering Group, University of Hyogo
  • Fukui Keisuke
    School of Mechanical System Engineering, Environmental Energy Engineering Group, University of Hyogo

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Other Title
  • 海水資源に関する電解質の溶解度モデルの開発
  • カイスイ シゲン ニ カンスル デンカイシツ ノ ヨウカイド モデル ノ カイハツ

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Abstract

The major marine resources are electrolytes, and they are mainly dissolved as ions. More than 70 wt% of electrolytes are sodium chloride, but other electrolytes are also dissolved in seawater. To develop a separation or recovery of electrolytes in seawater, we discussed the electrolyte solution model applied to several electrolytes in seawater. The electrolyte NRTL (Non-Random Two Liquid model) for activity coefficient can be applied to multicomponent systems. Twelve solubility data of two-component systems (water + one electrolyte) are correlated by the solubility product function with the electrolyte NRTL model, and we determined the parameters of solubility products. Some solubility data of three-component systems (water + two electrolytes) were compared to the predicted solubility by electrolyte NRTL model.

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