Heterogeneous reaction of NO2 on the surface of mineral dust particles

Abstract

Heterogeneous reaction of NO2 on the surface of mineral dust particles could change the chemical composition, size, morphology, and hygroscopic properties of mineral dust particles, and hence their optical properties and cloud nucleation. Therefore, the heterogeneous reaction of NO2 on the surface of mineral dust particles will result in the changes of direct and indirect radiative forcing of mineral dust particles, and significantly impact on the atmospheric oxidizing capacity and climate change. This paper introduces the methodology and reaction systems used to study the heterogeneous reactions of reactive gases on particles, describes the findings of the heterogeneous reaction products and mechanisms of N02 on the surfaces of oxide particles, summarizes literature of reported uptake coefficients of N02 reaction on the surface of mineral dust particles, and discuss scientific questions about the reaction that needs further research.