製塩工程におけるヨウ素およびフッ素の挙動

  • 新野 靖
    Sea Water Science Research Laboratry, Japan Tobacco Inc.
  • 西村 ひとみ
    Sea Water Science Research Laboratry, Japan Tobacco Inc.
  • 中島 美帆
    Haramachi Daiichi Junior High School under Haranlachi Manicipal Management
  • 赤間 美文
    Department of Chemistry, Faculty of Science and Engineering, Meisei University

書誌事項

タイトル別名
  • Behavior of Iodine and Fluorine in the Process of Salt Making
  • セイエン コウテイ ニ オケル ヨウソ オヨビ フッソ ノ キョドウ

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抄録

We determined iodine levels in samples from the process of salt making by the ICP-AES method with a flow injection device and fluorine levels by absorptiometry using alfusone, and the following results were obtained. 1) On the analysis of fluorine in high-salinity samples, the recovery ratio with pretreatment by the distillation method was greater than 93%. 2) Fluorine was not concentrated by the ion-exchange membrane method, but iodine. The permaselectivity of iodine against chloride ion with an ion-exchange membrane was approximately one. 3) A large percentage of IO3- in seawater was deoxidized to I- by the ion-exchange membrane method. 4) The iodine content of the samples in the process of concentration were almost the same as their fluorine content.

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