Airborne pollutant characteristics in an urban, industrial and agricultural complex metroplex with high emission loading and ammonia concentration

Tsai, Jason Sheng Hong; Chang, Li Peng; Chiang, Hung‐Lung

doi:10.1016/j.scitotenv.2014.06.120

Cited by 16 publications

(12 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noted that due to high temperatures and stable atmospheric conditions, several days with relatively high NH 3 levels were recorded in our observation, consequently leading to a relatively large mean NH 3 concentration. The NH 3 level in Beijing was lower compared to the measurements in some other cities around the world; for example, in Kaohsiung, Taiwan (31.5 ± 16.1 µg m -3 , winter 2006, Tsai et al, 2014);Kanpur, India (26.4 ± 5.8 µg m -3 , winter 2007, Behera andSharma, 2010); and Lahore, Pakistan (50.1 ± 16.9 µg m -3 , winter 2005, Biswas et al, 2008). However, in Beijing, the NH 3 level was still higher than those observed in some other cities of China including Shanghai (6.6 µg m -3 , autumn 2012, Shi et al, 2014) Hu et al, 2008).…”

Section: Nh 3 Concentration and Its Temporal Variationmentioning

confidence: 57%

“…The gas-to-particle conversion processes in ambient atmosphere may produce inorganic ammonium salts of ammonium bisulfate (NH 4 HSO 4 ), ammonium sulfate ((NH 4 ) 2 SO 4 ), (Tsai et al, 2014). It is known that NH 4 HSO 4 or (NH 4 ) 2 SO 4 is preferentially formed among the ammoniumassociated compounds because the affinity of sulfuric acid for NH 3 is much larger than that of nitric acid and hydrochloric acid for NH 3 (Pandolfi et al, 2012;Behera et al, 2013b ) (Behera and Sharma, 2012).…”

Section: Relationship Between Nh 3 and Ammonium Salts In Pm 25 Overamentioning

confidence: 99%

See 1 more Smart Citation

Variation of Urban Atmospheric Ammonia Pollution and its Relation with PM2.5 Chemical Property in Winter of Beijing, China

Zhao

Wang

Tan

et al. 2016

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

To understand the air pollution problem in megacities such as Beijing, field measurement investigating the variation of NH 3 and its association with PM 2.5 chemical property was conducted from 25 November to 24 December 2013. The results indicated that the daily concentration of wintertime NH 3 tended to be high on the days with relatively high temperatures and low wind speeds. Affected by the synoptic condition, NH 3 concentration showed a bimodal diurnal variation pattern, which tended to peak at around 09:00 and 22:00 of the day. As the sole precursor for NH 4 + , NH 3 exerted a significant impact on the ion chemistry of PM 2.5 through enhancing the nighttime NH 4 Cl formation and promoting both homogeneous and heterogeneous formation of NO 3 -. During heavy pollution episodes with PM 2.5 concentrations over 200 µg m -3 , the NH 3 levels and NH 4 + /NH 3 ratios grew simultaneously with the increase of PM 2.5 levels, indicating that NH 3 is one of the key reasons for heavy pollution events. Revealed by the features of measured ionic species in PM 2.5 , in conjunction with the acidity analysis using thermodynamic model, our results suggested that NH 3 was frequently sufficient in wintertime atmosphere of urban Beijing and the fine particulates were neutralized nearly fully by NH 3 .

show abstract

Section: Nh 3 Concentration and Its Temporal Variationmentioning

confidence: 57%

Section: Relationship Between Nh 3 and Ammonium Salts In Pm 25 Overamentioning

confidence: 99%

Variation of Urban Atmospheric Ammonia Pollution and its Relation with PM2.5 Chemical Property in Winter of Beijing, China

Zhao

Wang

Tan

et al. 2016

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

show abstract

“…3 essential to understand secondary inorganic aerosol formation from precursor gases, including NH3 (Tsai, Chang, and Chiang 2014). Because of their low molecular weights, NH3 and NH4 + have a more significant impact on molar-based aerosol chemical and optical properties than the same mass of nitrate (NO3 -), sulfate (SO4 2-) or organic compounds (Sun et al 2017).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…4 biogenic sources, 1 % from traffic) (Tsai, Chang, and Chiang 2014), the North-China plain (88 % from fertilizer application and livestock waste) (Zhang et al 2018) and the U.S. (86 % from agricultural and natural sources, 8 % from road traffic) (Livingston, Rieger, and Winer 2009). The contribution from vehicles was assumed to be negligible until 1995 in the U.S. (Eggleston 1992;Sutton et al 1995;Perrino et al 2002), after which an increase in NH3 traffic emissions occurred (Fraser and Cass 1998;Moeckli, Fierz, and Sigrist 1996;Perrino et al 2002) in parallel to the increasing proportion of three-way catalytic converters (TWC) in gasoline vehicles from < 10 % of the vehicle fleet in 1981 to > 75 % in 1993 in the U.S. (Kean et al 2009).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

See 1 more Smart Citation

Source Apportionment of Urban Ammonia and its Contribution to Secondary Particle Formation in a Mid-size European City

Ehrnsperger

Klemm

2021

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

Ambient air pollution caused by fine particulate matter (PM) and trace gases is a pressing topic as it affects the vast majority of the world's population, with a particularly heavy influence in densely populated urban environments. Alongside nitrogen oxides (NO x) and PM, ammonia (NH3) is also a relevant air pollutant due to its role as a precursor of particulate ammonium. This is a study about the short-term temporal dynamics of urban NH3 concentrations in Münster, northwest Germany, the role of road traffic and agriculture as NH3 sources and about the importance of ammonia for secondary particle formation (SPF). The NH3 mixing ratio was rather high (mean: 17 ppb) compared to other urban areas and showed distinct diurnal maxima around 10 a.m. and during the night at 9 p.m.. The main source for ammonia in Münster was agriculture, but road traffic also contributed through local emissions from vehicle catalysts. NH3 from surrounding agricultural areas accumulated in the nocturnal boundary layer and contributed to SPF in the city center. Modeled emissions of NH3 as estimated by the Handbook for Emission Factors in combination with traffic counts were in the same magnitude for NH3. The size-resolved chemical composition of inorganic ions in PM10 was dominated by NH4 + (8.66 µg m-3), followed by NO3-(3.89 µg m-3), SO4 2-(1.58 µg m-3) and Cl-(1.33 µg m-3). Particles in the accumulation range (diameter: 0.1-1 µm) showed the highest inorganic ion concentrations. The ammonium neutralization index J (111 %) indicated an excess of NH4 + leading to mostly alkaline PM. High ammonia emissions from surrounding agricultural areas combined with large amounts of NOx from road traffic play a crucial role for SPF in Münster.

show abstract

Associations of ambient PM2.5 and O3 with cardiovascular mortality: a time-series study in Hefei, China

et al. 2019

View full text Add to dashboard Cite

Airborne pollutant characteristics in an urban, industrial and agricultural complex metroplex with high emission loading and ammonia concentration

Cited by 16 publications

References 59 publications

Variation of Urban Atmospheric Ammonia Pollution and its Relation with PM2.5 Chemical Property in Winter of Beijing, China

Variation of Urban Atmospheric Ammonia Pollution and its Relation with PM2.5 Chemical Property in Winter of Beijing, China

Source Apportionment of Urban Ammonia and its Contribution to Secondary Particle Formation in a Mid-size European City

Associations of ambient PM2.5 and O3 with cardiovascular mortality: a time-series study in Hefei, China

Contact Info

Product

Resources

About