Separation of Lower Molecular Weight Iron (III) by an Extraction Method with 8-Quinolinol and the Form of Iron (III) Ions on the Hydrolysis Reaction

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  • NISHIKAWA Yasuharu
    Department of Chemistry, Faculty of Science and Technology, Kinki University
  • HIRAKI Keizo
    Department of Chemistry, Faculty of Science and Technology, Kinki University
  • GOHDA Shiro
    Department of Chemistry, Faculty of Science and Technology, Kinki University
  • NAKAGAWA Kazumi
    Department of Chemistry, Faculty of Science and Technology, Kinki University
  • TAMAKI Muneo
    Department of Chemistry, Faculty of Science and Technology, Kinki University

Bibliographic Information

Other Title
  • 8-キノリノールによる低分子量鉄(III)の抽出分離と加水分解反応における鉄(III)の存在状態
  • ８‐キノリノールによる低分子量鉄（ＩＩＩ）の抽出分離と加水分解反応における鉄（ＩＩＩ）の存在状態

Description

An improved extraction method with 8-quinolinol has been studied on the determination of lower molecular weight iron (III) ions in aqueous solution in the presence of higher molecular weight iron (111) ions. The extractable iron (III) species were considered to be the monomeric species. The monomeric species (lower molecular weight iron (Ill) ions) were also confirmed by UV spectroscopy and ultrafiltration (Diaflo Membrane UM). The rate of hydrolysis of iron (ff) ions was measured by the improved extraction method. The reaction rate is of the second order, and the Arrhenius plots of the rate constants vs. temperature gave a straight line. The Arrhenius activation energy (4E4), activation freeenergy (tIGI. K) and activation entropy (4S) are 39.5 kcal/mol, 16.4 kcal/mol and 73 e. u. ([Fes]: (1.40.1) x 10-4 mol/l, pH: 3.40 0.05) respectively.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1975 (9), 1479-1484, 1975-09-10

    The Chemical Society of Japan

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