Reduction of Cr(VI) by peat and coal humic substances

Denis M. Zhilin, Philippe Schmitt-Kopplin, Irina V. Perminova

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66 Scopus citations


The reduction of Cr(VI) by humic substances from leonardite and peat was investigated by capillary zone electrophoresis at various pHs. Both humic materials reduced Cr(VI) at pH 5.4, but not at basic pH. The capacity of leonardite humic substances to reduce Cr(VI) was lower than that of peat humic substances. Fe(III) accelerated the reduction of Cr(VI) by peat humic substances, but not by leonardite humic substances. Cr(VI) reduction mechanisms are proposed. The coal humic substances seem more suitable for remediation of Cr(VI)- contaminated sites.

Original languageEnglish
Pages (from-to)141-145
Number of pages5
JournalEnvironmental Chemistry Letters
Issue number3
StatePublished - 2004
Externally publishedYes


  • Capillary zone electrophoresis
  • Chromium
  • Humic substances
  • Redox
  • Remediation


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