Reduction of Potassium Chromate By Tannins

Access this Article

Search this Article

Author(s)

Abstract

The reduction of potassium chromate has been carried out with several tannin substances, including gallic acid, pyrogallol, ethyl gallate, polygalloylglucose, and withered oak-leaf tannin. Each reaction was followed by colorimetry, EPR spectroscopy, electrochemistry, and molecular-sieve chromatography. The progress of the chromate reductions was monitored by measuring the VIS and EPR spectra as a function of time. The observed preudo-first-order reaction rate constants for Cr(III) formation were derived based on the intensities of the Cr(III) signals of the EPR spectra. Cyclic voltammograms of the simple reductants and their final Cr(III)-containing products formed from the reductions of chromate have also been measured. The formation of Cr(III)–tannin complexes was indicated by separation on a Sephadex G-25 column. The results obtained from VIS, EPR, and cyclic voltammetry were found to be mutually dependent, and showed close correlations among the data. The rate of reduction for Cr(VI) revealed the following trend: gallic acid > pyrogallol > ethyl gallate > polygalloylglucose > witheredoak-leaf tannin. The results obtained in the present study suggest that the rates of reduction for Cr(VI) in the tannins depend upon their peak oxidation potentials and stabilities for Cr(III)–tannin complexes.

Journal

  • Bulletin of the Chemical Society of Japan

    Bulletin of the Chemical Society of Japan 71(8), 1993-1998, 1998-08-15

    The Chemical Society of Japan

References:  24

  • <no title>

    BIANCHI V.

    Toxicol. Environ. Chem. Rev. 15, 1, 1987

    Cited by (1)

  • <no title>

    BORGES K. M.

    Carcinogenesis 10, 2165, 1989

    Cited by (1)

  • <no title>

    CONNETT P. H.

    Struct. Bonding(Berlin) 54, 93, 1983

    Cited by (1)

  • <no title>

    O'BRIEN P.

    Inorg. Chim. Acta 108, L19, 1985

    Cited by (1)

  • <no title>

    GOODGAME D. M. L.

    Inorg. Chim. Acta 135, L5, 1987

    Cited by (1)

  • <no title>

    BRANCA M.

    Inorg. Chim. Acta 153, 61, 1988

    Cited by (1)

  • <no title>

    RAO C. P.

    Proc. Ind. Acad. Sci., (Chem. Sci. ) 102, 219, 1990

    Cited by (1)

  • <no title>

    RAO C. P.

    Carbohydr. Res. 244, 15, 1993

    Cited by (1)

  • <no title>

    KAIWAR S. P.

    Chem. -Biol. Interact. 95, 89, 1995

    Cited by (1)

  • <no title>

    KAWANISHI S.

    J. Biol. Chem. 261, 5952, 1986

    Cited by (3)

  • <no title>

    OHBA H.

    J. Inorg. Biochem. 27, 179, 1986

    Cited by (1)

  • <no title>

    FARELL R. P.

    Comments Inorg. Chem. 13, 133, 1992

    Cited by (1)

  • <no title>

    WACKER W. E. C.

    J. Biol. Chem. 234, 3257, 1959

    Cited by (1)

  • <no title>

    RAO C. P.

    Carbohydr. Res. 237, 195, 1992

    Cited by (1)

  • <no title>

    BOYKO S. L.

    Inorg. Chim. Acta 123, 189, 1986

    Cited by (1)

  • <no title>

    ARAKAWA H.

    Chem. Lett. 1993, 2113

    Cited by (3)

  • <no title>

    ARAKAWA H.

    Bull. Chem. Soc. Jpn. 69, 1133, 1996

    Cited by (2)

  • <no title>

    SANDELL E. B.

    Colorimetric Determination of Trace Metals 392, 1959

    Cited by (2)

  • <no title>

    IKEGAYA K.

    Chagyo Gijitsu Kenkyu 71, 43, 1990

    Cited by (2)

  • <no title>

    RAO C. P.

    Int. J. Environ. Stud., Sect. B 54B, 131, 1998

    Cited by (1)

  • <no title>

    TSAPAKOS M. J.

    Chem. Biol. Interact. 46, 265, 1983

    DOI  Cited by (4)

  • <no title>

    KAIWAR S. P.

    Carbohydr. Res. 256, 29, 1994

    DOI  Cited by (2)

  • <no title>

    KAIWAR S. P.

    J. Chem. Soc., Dalton Trans. 1995, 1569

    DOI  Cited by (1)

  • <no title>

    LEVANON H.

    J. Chem. Phys. 53, 3056, 1970

    DOI  Cited by (1)

Codes

  • NII Article ID (NAID)
    10008935805
  • NII NACSIS-CAT ID (NCID)
    AA00580132
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00092673
  • NDL Article ID
    4547503
  • NDL Source Classification
    ZP1(科学技術--化学・化学工業)
  • NDL Call No.
    Z53-B35
  • Data Source
    CJP  NDL  J-STAGE 
Page Top