Photochemistry of Adsorbed Nitrate

摘要

Nitrate ion is an important chromophore in natural water systems. In the atmosphere, gas-phase nitrogen oxides readily react with paniculate matter (e.g., mineral dust) to yield adsorbed nitrate, yet little is known about the photochemistry of nitrate on the surface of these particles. In this study, the photochemistry of adsorbed nitrate is explored. Because the molecular structure of adsorbed nitrate changes in the presence of coadsorbed water, we have investigated the role of water in the photolysis of adsorbed nitrate. Additionally, the role of molecular oxygen on the gas-phase product distribution is investigated.