Oxidation of Sodium Thiosulfate with Hydrogen Peroxide and Sodium Hypochlorite

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  • YOKOSUKA Futoshi
    Department of Applied Chemistry, Faculty of Engineering, Tohoku University
  • KURAI Toshikiyo
    Department of Applied Chemistry, Faculty of Engineering, Tohoku University
  • OKUWAKI Akitsugu
    Department of Applied Chemistry, Faculty of Engineering, Tohoku University
  • OKABE Taijiro
    Department of Applied Chemistry, Faculty of Engineering, Tohoku University

Bibliographic Information

Other Title
  • チオ硫酸ナトリウム水溶液の過酸化水素酸化および次亜塩素酸ナトリウム酸化
  • 低原子価硫黄化合物の反応に関する研究　ＸＩＩ　　チオ硫酸ナトリウム水溶液の過酸化水素酸化および次亜塩素酸ナトリウム酸化

Description

Sodium thiosulfate was oxidized at 20∼75°C with HO, and NaClO in the solution having a total sulfur concentration of 0.04 mol-S/l. The oxidation of intermediate tri- and tetrathionates was also examined to elucidate the mechanism of oxidation of thiosulfate.<BR>H2O2- Oxidation: Competitive reactions took place to form tri- and tetrathionates. At pH 4, the reactions (3)∼(5) proceeded so slowly that the reaction products were only tri- and tetrathionates formed by the reactions (1) and (2).<BR>In the presence of Fe2+, however, thiosulfate was completely oxidized to sulfate even at such a low pH. At higher pHs, it was found that the oxidation of tri- and tetrathionates to form sulfate took place beside the direct oxidation of thiosulfate to sulfate.<BR>NaClO Oxidation: Following reactions took place to produce tri- and tetrathionates, which were finally oxidized to sulfate in all of the pH region tested.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1975 (11), 1901-1909, 1975-11-10

    The Chemical Society of Japan

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