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 language | English |
|---|---|
| Pages (from-to) | 435-441 |
| Number of pages | 7 |
| Journal | Journal of Geochemical Exploration |
| Volume | 64 |
| Issue number | 1-3 -3 pt 1 |
| DOIs | |
| Publication status | Published - 1998 Nov |
| Externally published | Yes |
| Event | Proceedings of the 4th International Symposium on Environmental Geochemistry ISEG. Pt 1 (of 2) - Vail, CO, USA Duration: 1997 Oct 5 → 1997 Oct 10 |
Keywords
- Chromium
- Manganese
- Optimal condition
- Oxidation and adsorption
- Soils
ASJC Scopus subject areas
- Geochemistry and Petrology
- Economic Geology