ES&T | 剖析大气硝酸盐在光敏矿物沙尘上的转化过程中金属离子的光化学反应活性

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Dissecting the Photochemical Reactivity of Metal Ions during Atmospheric Nitrate Transformations on Photoactive Mineral Dust （ 由于标题字数限制， 中文标题为自翻，以原标题为准） Abstract Dissecting the photochemical reactivity of metal ions is a significant contribution to understanding secondary pollutant formation, as they have a role to be reckoned with atmospheric chemistry. However, their photochemical reactivity has received limited attention within the active nitrogen cycle, particularly at the gas–solid interface. In this study, we delve into the contribution of magnesium ion (Mg2+) and ferric ion (Fe3+) to nitrate decomposition on the surface of photoactive mineral dust. Under simulated sunlight irradiation, the observed NOX production rate differs by an order of magnitude in the presence of Mg2+ (6.02 × 10–10 mol s–1) and Fe3+ (2.07 × 10–11 mol s–1). The markedly decreased fluorescence lifetime induced by Mg2+ and the change in the valence ………………………………