Chemical characterization of water-soluble components of PM10 and PM2.5 atmospheric aerosols in five locations of Nanjing, China

Wang, Gehui; Wang, Hui; Yu, Yajuan; Gao, Shixiang; Feng, Jiao; Gao, Siyang; Wang, Liansheng

doi:10.1016/s1352-2310(03)00271-1

Cited by 156 publications

(79 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to Morales et al 21 and Wang et al, 22 seawater and non-seawater potassium and sulfate concentrations can be estimate using the water-soluble sodium concentration:…”

Section: Resultsmentioning

confidence: 99%

Multi-site PM2.5 and PM2.5-10 aerosol source apportionment in Rio de Janeiro, Brazil

Soluri

Godoy

et al. 2007

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Foi realizada a amostragem de aerossol em dez locais distribuídos em diferentes regiões da cidade do Rio de Janeiro, de setembro/2003 a setembro/2004, em uma base semanal com amostragens de 24 horas. As frações do aerossol PM 2.5 e PM 2.5-10 foram amostradas usando um sistema com filtros em série. Foram determinadas: a massa do aerossol, carbono elementar, a concentração dos íons solúveis, assim como a concentração total de alumínio, cálcio, ferro, magnésio, potássio, sódio e titânio. A concentração mássica média anual do PM 10 variou de 18 a 38 μg m -3 , sem violação dos padrões brasileiros de qualidade do ar. Para as frações fina e grossa, entre 70 e 90% da massa medida foi identificada como sendo devido à poucas fontes, sendo que a poeira do solo explica 37-63% da massa da fração grossa (PM 2.5-10 ). Por outro lado, o carbono elementar e o aerossol secundário representam proporções elevadas (45-58%) da massa da fração fina (PM 2.5 ).Aerosol sampling was performed at ten sites distributed in different location of Rio de Janeiro city, from September/2003 to Sepetember/2004, on a weekly basis with 24 h sampling time interval. PM 2.5 and PM 2.5-10 aerosol particles were sampled using Stacked Filter Units (SFU). Aerosol mass, black carbon, water soluble ions concentration as well as total aluminum, calcium, iron, magnesium, potassium, sodium and titanium concentration were determined. Mean annual PM 10 mass concentration ranged from 18 to 38 μg m -3 , without violation of the Brazilian air quality standards. For fine and coarse modes, between 70 and 90% of the measured mass was apportioned to relatively few sources, soil dust accounts for 37-63% of the coarse mode mass. On the other hand, black carbon and secondary aerosol, related to anthropogenic sources as fuel burning, represents very high proportions (45-58%) of the PM 2.5 mass.Keywords: Brazil, air pollution, aerosol, source apportionment IntroductionThe city of Rio de Janeiro is one of the twenty biggest urban agglomerations in the world, with 11 million inhabitants in the metropolitan area and the first, among the Brazilian cities, in respect to the population density, with 1700 hab/km 2 . 1,2 Among the metropolitans regions existing in the country, Rio de Janeiro has the highest degree of urbanization, 96.8%, and responds for 80% of the internal income of the State and 13% of the Country. 1,3 Factors such as local topography, irregular occupation of the space, presence of open sea and a fraction of the urban area at the Guanabara Bay influence the urban atmosphere of the city of Rio de Janeiro. These factors result in an efficient, however complex, regimen of atmospheric circulation, combining winds with the canalizations originated from its topography, and, consequently, contributing to an irregular distribution and dispersion of pollutants. The climatological evaluation of the atmospheric circulation in Rio de Janeiro shows that the highest wind direction frequency is from SouthSoutheast to Northeast sectors, along the year, with average wind velocity o...

show abstract

“…According to Morales et al 21 and Wang et al, 22 seawater and non-seawater potassium and sulfate concentrations can be estimate using the water-soluble sodium concentration:…”

Section: Resultsmentioning

confidence: 99%

Multi-site PM2.5 and PM2.5-10 aerosol source apportionment in Rio de Janeiro, Brazil

Soluri

Godoy

et al. 2007

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…The calcium appears to originate mostly from the maritime source at all sites. (Wang et al, 2003;Watanabe et al, 2006;Polkowska et al, 2008;Jao, 2011. *** nss-Cl -< 0 due to transformation of Cl -from the aerosol phase into the gas phase (as HCl) after acidification of the fog water by anthropogenic sulfuric and nitric acids.…”

Section: Ion and Metal Concentrations In Fog Watermentioning

confidence: 99%

Chemical Composition of Fog Water at Four Sites in Taiwan

Šimon

Klemm

El-Madany

et al. 2016

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

This study characterizes and compares the chemical composition of fog water at four sites in Taiwan. Fog was sampled with identical active fog collectors (modified Caltech design) using identical sampling strategies at all four sites. While the sites varied largely in terms of altitude above mean sea level (asl), type of fog, and the potential sources of constituents in fog water, the chemical composition of fog water was in all cases clearly dominated by H + , NH 4 + , NO 3 -and SO 4 2-, making up more than 85% of the total ion concentrations. The pH ranged from 2.27 to 5.95.Sulfur dioxide emissions from coal combustion in Mainland China and Taiwan as well as nitrogen oxide emissions from urbanized central-west Taiwan and the greater Taipei region were the main precursors of fog acidity. Ammonia, originating from agriculture emissions, was the main neutralizer. The Kinmen site (48 m asl), situated on an island close to Mainland China, exhibited the lowest pH and the highest sulfate concentrations. At the Xitou site on the western slopes of the Taiwan Central Mountain Range (1150 m asl), ammonium from agriculture dominated and lead to relatively high pH. At the same time, the nitrate/sulfate ratio was highest at this site (> 1 in equivalent units), resulting from relatively large contributions from street traffic. The ion concentrations at the Chilan site (1650 m asl) and the Lulin high mountain site (2862 m asl) were much lower than those at Xitou and Kinmen. While the ion concentrations at Chilan were considerably lower than at Lulin, the ion loadings, which is the amount of dissolved ions per volume of air, were similar at Chilan and Lulin.

show abstract

“…Numerous studies on changes in the chemical properties of Asian dust particles during long-range transport have been documented (Kanayama et al, 2002;Parrington et al, 1983;Zhang et al, 2003), but most of them were performed in urban (Huang et al, 2010b;Sun et al, 2004;Wang et al, 2002bWang et al, , 2003Yuan et al, 2008;Zhang et al, 2009), rural and marine areas (Decesari et al, 2005;Geng et al, 2009;Kanayama et al, 2002;Wang et al, 2009a) . In contrast, only a limited number of observations on aerosol chemistry were conducted at alpine sites, most of which are situated in the eastern part of China Wang et al, 2009bWang et al, , 2009c.…”

Section: Introductionmentioning

confidence: 99%

Observation of atmospheric aerosols at Mt. Hua and Mt. Tai in central and east China during spring 2009 – Part 1: EC, OC and inorganic ions

Wang

Cheng

et al. 2011

Atmos. Chem. Phys.

View full text Add to dashboard Cite

4 at Mt. Tai may suggest the changes in chemical composition of the atmosphere over east China due to sharply increasing vehicle emission. pH values of the water-extracts of PM 10 samples indicate that at the two mountain sites aerosols transported from the south regions are more acidic than those from the north and more acidic at Mt. Tai than at Mt. Hua during the non-dust storm period. During the dust storm event particle mass, OC, Na + , K + , Mg 2+ and Ca 2+ at both sites increased by a factor of 1-9, while EC, NO Linear regression for ion equivalents in fine particles indicates that ammonium exists in the forms of NH 4 NO 3 and NH 4 HSO 4 at Mt. Hua and NH 4 NO 3 and (NH 4 ) 2 SO 4 at Mt. Tai during both the nonevent and the event periods. While the regression for coarse mode of Ca 2+ suggests a close coupling of dust with nitrate during the nonevent time and with sulfate during the dust-storm period. pH values of the sizeresolved samples further suggest that during the nonevent period most acidic particles at Mt. Hua are in the range of 0.7-1.1 µm, while those at Mt. Tai are in the range of 1.1-2.1 µm. Aerosols at both sites became alkaline during the event, but the Mt. Tai particles still showed a lower pH value.

show abstract

Chemical characterization of water-soluble components of PM10 and PM2.5 atmospheric aerosols in five locations of Nanjing, China

Cited by 156 publications

References 24 publications

Multi-site PM2.5 and PM2.5-10 aerosol source apportionment in Rio de Janeiro, Brazil

Multi-site PM2.5 and PM2.5-10 aerosol source apportionment in Rio de Janeiro, Brazil

Chemical Composition of Fog Water at Four Sites in Taiwan

Observation of atmospheric aerosols at Mt. Hua and Mt. Tai in central and east China during spring 2009 – Part 1: EC, OC and inorganic ions

Contact Info

Product

Resources

About