Elemental carbon reduces Fe3+ to Fe2+ in aqueous solutions. This process has
potential implications in the adverse health effects of fine particles in air pollution,
because both elemental carbon and iron are major components in atmospheric
particulate matter. In this study we measured the time-dependent release of iron from
laboratory flames and standard reference soot particles that contained iron, and the
reduction of Fe3+ to Fe2+ in an acid extraction process. The concentration of Fe3+ and
Fe2+ ions in the extraction solutions was measured by a spectrophotometric method.
The results showed that while Fe3+ was the dominant valence state in the dry soot
particles, significant fraction of iron was reduced to Fe2+ in the aqueous solution.
Further investigation is needed to assess the significance of this phenomenon in the
biological effects of particles that contain iron and elemental carbon.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-2769 |
| Date | 15 May 2009 |
| Creators | Drake, Stephen James |
| Contributors | Guo, Bing |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | electronic, application/pdf, born digital |
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