Research Progress on Heterogeneous Reactions of Pollutant Gases on the Surface of Atmospheric Mineral Particulate Matter in China

Abstract

Haze is the phenomenon of visibility degradation caused by extinction effects related to the physicochemical properties of atmospheric particulate matter (APM). Atmosphere heterogeneous reactions can alter the physicochemical properties of APM. Therefore, it is important to understand the atmospheric heterogeneous reactions of APM in order to reveal the cause of haze. Herein, the current situation, developmental trend, source, and composition of APM pollution in China are reviewed. Additionally, we introduce the reaction characteristics and key chemical processes of common inorganic, organic, and mixed pollutant gases on the surface of mineral particles. The effects of mineral particulate matter on aggregation, regulation, and catalysis in the formation of atmospheric aerosols and the synergistic reaction mechanism of SO2, NO2, O3, and VOCs on the surfaces of different mineral particles are summarized. The problems existing in the current research on heterogeneous reactions on the surfaces of mineral particles are also evaluated. This paper aims to gain a deep understanding of the mechanism of mineral particulate matter promoting the formation of secondary aerosols and attempts to provide theoretical support for effective haze control.

Interaction of Acrylic Acid and SO2 on the Surface of Mineral Dust Aerosol

“…7,9 Moreover, mineral dust aerosols can connect land, atmosphere, and ocean to deeply influence their substances cycle. 10,11 They remain in the atmosphere for a long period of time and undergo a series of heterogeneous reactions with trace gases, thereby altering the physicochemical properties, such as size, toxicity, and acidity, 9,12 hygroscopicity and optical properties, 13 nucleation ability, 14 and chemical reactivity 15,16 of particles. Eventually, they will sink to land or sea by the process of dry and wet deposition.…”

“…Mineral dust aerosols have an average life span of a few days in the troposphere after being released into the atmosphere . In addition to natural emissions, human activities, such as grazing and mining, also contribute to an increase in their emissions in the atmosphere. , Moreover, mineral dust aerosols can connect land, atmosphere, and ocean to deeply influence their substances cycle. , They remain in the atmosphere for a long period of time and undergo a series of heterogeneous reactions with trace gases, thereby altering the physicochemical properties, such as size, toxicity, and acidity, , hygroscopicity and optical properties, nucleation ability, and chemical reactivity , of particles. Eventually, they will sink to land or sea by the process of dry and wet deposition. , Many studies have been carried out to investigate the heterogeneous reactions of mineral dust aerosol, and their focus has shifted from the simple reactions of individual trace gases to more complex conditions in which multiple gases coexist.…”