Determination of optimal chromium oxidation conditions and evaluation of soil oxidative activity in soils

Tomoyuki Makino, Kunihiko Kamewada, Tamao Hatta, Yoshiaki Takahashi, Yasuhiro Sakurai

Research output: Contribution to journalConference articlepeer-review

17 Citations (Scopus)

Abstract

The oxidation of chromium(III) to chromium(VI) (Cr oxidation) in soils is caused by manganese (Mn) oxides and represents a soil oxidative activity derived from Mn oxides. Two Andisols (surface and subsurface horizon) and an Inceptisol were analyzed to determine optimal Cr oxidation conditions based on the following factors: coexistent anion, reaction pH, added Cr(III) concentration and reaction time. The determined optimal Cr oxidation condition was applied to 26 soils, including Andisols, Inceptisols and Entisols. Extremely low Cr oxidation, i.e. soil oxidative activity, was observed, regardless of easily reducible Mn content in Andisols compared with other soils. This suggested that the danger posed by Cr(VI) and soil oxidative activity are low in Andisols.

Original languageEnglish
Pages (from-to)435-441
Number of pages7
JournalJournal of Geochemical Exploration
Volume64
Issue number1-3 -3 pt 1
DOIs
Publication statusPublished - 1998 Nov
Externally publishedYes
EventProceedings of the 4th International Symposium on Environmental Geochemistry ISEG. Pt 1 (of 2) - Vail, CO, USA
Duration: 1997 Oct 51997 Oct 10

Keywords

  • Chromium
  • Manganese
  • Optimal condition
  • Oxidation and adsorption
  • Soils

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Economic Geology

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