ENVR 38 |
| Namgoo Kang, Purnendu K. Dasgupta, Todd A. Anderson, and W. Andrew Jackson. |
| A significant body of evidence with regard to ubiquitous detection of naturally occurring perchlorate clearly indicates its atmospheric origins, yet photochemical perchlorate formation potentials have not been explored nor relevant mechanistic pathways with experimental evidence been adequately proposed. Proof-of-concept experiments from this study demonstrated that perchlorate could be formed as a minor end-product of photochemical decompositions of oxychlorine precursors such as hypochlorite, chlorite and chlorate solutions via ultraviolet (UV) radiation under artificial lamps and sunlight. In addition, this study attempted to probe significant photochemical pathways in light of perchlorate formation. It is hypothesized based upon the current understanding of oxychlorine photochemistry that as an intermediate of photochemically initiated chain reactions of the oxychlorine anions, chlorine dioxide (ClO2) is the most probable species directly responsible for perchlorate formation under UV radiation. Kinetics of photochemical perchlorate formation from oxychlorine anions and chlorine dioxide are currently under investigation. |
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Environmental Occurrence, Fate and Transport of Chemicals and Nanomaterials
8:30 AM-12:05 PM, Monday, 27 March 2006 Georgia World Congress Center -- B217, Oral
Division of Environmental Chemistry |