Investigating the potential role of ammonia in ion chemistry of fine particulate matter formation for an urban environment

Behera, S. N.; Sharma, Mukesh

doi:10.1016/j.scitotenv.2010.04.017

Cited by 234 publications

(123 citation statements)

References 33 publications

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“…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: 56%

“…Norman et al (2009) and Meng et al (2011) compared different ammonia analysis methods and found accuracy of the online method is acceptable (correlation coefficient ranged from 0.77-0.94). Moreover, the chemiluminescence method has been used in several studies to measure ambient NH 3 and has exhibited satisfactory performances (Behera et al, 2010;Meng et al, 2011;Pandolfi et al, 2012). To obtain a finer temporal view of NH 3 variation, the NH 3 data from the ammonia analyzer was used in this study.…”

Section: Sample Analyses and Quality Assurancementioning

confidence: 99%

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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.

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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 .

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Section: Nh 3 Concentration and Its Temporal Variationmentioning

confidence: 56%

Section: Sample Analyses and Quality Assurancementioning

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.

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show abstract

“…However, ammonium must first combine with sulfate prior to nitrate and chloride because ammonium sulfate is more stable than the other possible products (Krupa 2003). The mass-size distribution of fine mode ammonium is consistent with that of sulfate, indicating that reactions involving sulfuric acid and ammonia in the particulate phase and sulfur dioxide accumulate mass in the fine mode (Behera and Sharma 2010;Krupa 2003).…”

Section: Ion Particle-size Distributionmentioning

confidence: 86%

“…(Behera and Sharma 2010;Krupa 2003). NH 3 is one of the most significant alkaline gases in the atmosphere and plays a major role in the neutralization of acidic atmospheric gases.…”

Section: Introductionmentioning

confidence: 99%

A study of water-soluble inorganic ions in size-segregated aerosols in atmospheric pollution episode

Toro

Morales

et al. 2013

Int. J. Environ. Sci. Technol.

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Particulate matter, the main pollutant in the atmospheric environment of the Santiago city in winter, was analyzed by means of the major water-soluble ionic species obtained under critical episodes of pollution in 2003. The particulate matter samples were collected using the Micro-Orifice uniform deposit impactors, with eight impactor stages connected in series, and the ionic species in particulate matter samples at each stage was analyzed by ion chromatography. While sulfate ion and nitrate ion showed bi-modal distributions, peaking in the fine and coarse mode, ammonium ion displayed a bi-modal size distribution, peaking in the fine and ultra fine mode. The equivalent concentration ratio of ammonium to sulfate was 2.03 ± 0.09, indicating the complete neutralization of sulfuric acid by ammonia. The excess ammonium ion was associated to nitrate ion. The study of the size distribution of water-soluble inorganic ions in particulate matter supports the notion that secondary aerosols play a significant role in the urban atmosphere.

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“…Such an expansion of continental high-pressure system, along with migrating low-pressure systems in northern China has been considered to be a dominant pathway driving Asian pollutions 25 off the continent. The associated cold advection also helps gas-to-particle heterogeneous processes to produce more secondary products in terms of PM concentrations (Behera and Sharma, 2010).…”

Section: Synoptic Weather Systems In East Asiamentioning

confidence: 99%

Synoptic perspectives on pollutant transport patterns observed by satellites over East Asia: Case studies with a conceptual model

Kim

Son

et al. 2016

Preprint

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Abstract. We demonstrate that daily pollutant transport patterns in East Asia are visible from satellite images when 15 inspected with corresponding synoptic weather analyses. Transport pathways of air pollutants in East Asia are investigated using satellite observations, surface weather charts, and chemical-transport model simulations. It is found that during cool season (fall to spring), pollutant transports in East Asia are largely determined by synoptic weather patterns associated with high pressure system over southern China, which is extended from the Siberia High, and low pressure system over Manchuria, which is initiated by Altai-Sayan cyclogenesis. Based on the relative location and strength of these weather 20 systems, three types of synoptic weather patterns that may contribute to pollutants transport in East Asia, especially in China and Korea, are identified: i.e., (1) a strengthening of the Siberian High and its southeastward propagation; (2) a high-pressure system over southern China followed by a frontal passage associated with a northern low-pressure system; and (3) a stagnant high-pressure system over southern China. For all three patterns, the high-pressure system in southern China is essential for the development of regional air pollution, while frontal activities associated with low-pressure system provide a forcing 25 mechanism to transport those pollutants eastward or southeastward. Observed and simulated surface PM distributions show good agreement in both aerosol optical depth and NO2 column density further implying that anthropogenic emissions also contribute to regional events of high surface PM concentrations. It is argued that the quasi-periodic migration of synoptic weather systems in East Asia works as an efficient pump of pollutants; i.e., regional air pollutions developed under highpressure systems are transported downstream by low-pressure systems. 30

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Investigating the potential role of ammonia in ion chemistry of fine particulate matter formation for an urban environment

Cited by 234 publications

References 33 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

A study of water-soluble inorganic ions in size-segregated aerosols in atmospheric pollution episode

Synoptic perspectives on pollutant transport patterns observed by satellites over East Asia: Case studies with a conceptual model

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