Heterogeneous Photo-oxidation of SO2 in the Presence of Two Different Mineral Dust Particles: Gobi and Arizona Dust

• DOI: 10.1021/acs.est.7b00588
• Publication Date: 2017-07-24T18:33:27Z
• Authors: Jiyeon Park; Myoseon Jang; Zechen Yu
• Keywords: Mineral dust

The impact of authentic mineral dust particles sourced from the Gobi Desert (GDD) on kinetic uptake coefficient SO2 was studied under varying environments (humidity, O3, and NOx) using both an indoor chamber outdoor chamber. There a significant increase in (γSO42-,light) for GDD UV light compared to value (γSO42-,dark) dark conditions at various relative humidities (RH) ranging 20% 80%. In presence absence O3 NOx, γSO42-,light γSO42-,dark greatly increased with increasing RH. resulting also that Arizona Test Dust (ATD) particles. values were 2 2.5 times greater than those ATD all RH levels. To understand photocatalytic act particles, characterized metal element composition fresh aerosol acidity aged hygroscopic properties We conclude difference formation sulfate between is regulated mainly by quantity semiconductive metals partially properties.