Characteristics of ambient ammonia and its effects on particulate ammonium in winter of urban Beijing, China

Nitrate formation and iron dissolution in the heterogeneous reactions of NH3 on nano α-Fe2O3

“…2,5,6 NH 3 , which is emitted from animal husbandry, agricultural production, industrial activities, traffic and biomass combustion, is a widespread alkaline gas in the atmosphere and the main precursor of NH 4 + . 1,2,7,8 The heterogeneous reactions of SO 2 and NO 2 on mineral dust surface have received extensive attention, [9][10][11] including the effect of NH 3 . 8,12,13 For example, He et al showed that under dry conditions, NH 3 can promote the formation of sulfate (SO 4 2− ) through proton transfer and neutralization with α-Fe 2 O 3 particles, while under wet conditions, it can promote the hydrolysis of nitrogen dioxide (NO 2 ) dimer into HONO, which leads to the formation of more SO 4 2− on the particle surface.…”

Highly efficient and reversible adsorption of ammonia by incorporation of deep eutectic solvents into silica gel and Al2O3

“…[1][2][3] Direct emission of NH 3 into the air will bring harmful effects to the environment and human health via forming acidic rain and haze. [4][5][6][7] Thus, it is increasingly important to develop suitable technology for the reduction and recycling of NH 3 . At present, water or acidic solution scrubbing methods are the most widely utilized methods to capture NH 3 in industry.…”

Elucidate the Formation Mechanism of Particulate Nitrate Based on Direct Radical Observations in Yangtze River Delta summer 2019

“…The product (HNO3) reacts with alkaline substance in aerosol by which generating particulate nitrate. This pathway mainly controled by precurors concentration as well as gas-particle partition of gaseous nitric acid and particulate nitrate depends on temperature, relative humidity (RH), NH3 concentration and aerosol acidity (Wang et al, 2009;Song and Carmichael, 2001;Meng et al, 2020;Zhang et al, 2021). At night, N2O5 uptake is an important nitrate formation pathway (Reaction 4) (Chen et al, 2020;.…”