scholarly journals Aerosol Liquid Water Promotes the Formation of Water-Soluble Organic Nitrogen in Submicrometer Aerosols in a Suburban Forest

2020 ◽  
Vol 54 (3) ◽  
pp. 1406-1414 ◽  
Author(s):  
Yu Xu ◽  
Yuzo Miyazaki ◽  
Eri Tachibana ◽  
Kei Sato ◽  
Sathiyamurthi Ramasamy ◽  
...  
Keyword(s):  
Liquid Water ◽  
Organic Nitrogen ◽  
Water Soluble ◽  
Soluble Organic Nitrogen

Increases in the formation of water soluble organic nitrogen during Asian dust storm episodes

2021 ◽  
Vol 253 ◽  
pp. 105486
Author(s):  
Qingyang Liu ◽  
Yanjiu Liu ◽  
Qiang Zhao ◽  
Tingting Zhang ◽  
James J. Schauer
Keyword(s):  
Dust Storm ◽  
Organic Nitrogen ◽  
Asian Dust ◽  
Water Soluble ◽  
Asian Dust Storm ◽  
Soluble Organic Nitrogen

scholarly journals Atmospheric Water Soluble Organic Nitrogen (WSON) over marine environments: a global perspective

2014 ◽  
Vol 11 (7) ◽  
pp. 11361-11389 ◽  
Author(s):  
K. Violaki ◽  
J. Sciare ◽  
J. Williams ◽  
A. R. Baker ◽  
M. Martino ◽  
...  
Keyword(s):  
Organic Nitrogen ◽  
Eastern Mediterranean ◽  
Anthropogenic Activities ◽  
Water Soluble ◽  
Global Perspective ◽  
Marine Atmosphere ◽  
Marine Aerosols ◽  
Total Dissolved Nitrogen ◽  
Comprehensive Picture ◽  
Soluble Organic Nitrogen

Abstract. To obtain a comprehensive picture on the spatial distribution of water soluble organic nitrogen (WSON) in marine aerosols, samples were collected during research cruises in the tropical and south Atlantic Ocean and during a one year period (2005) over the southern Indian Ocean (Amsterdam island). Samples have been analyzed for both organic and inorganic forms of nitrogen and the factors controlling their levels have been examined. Fine mode WSON was found to play a significant role in the remote marine atmosphere with enhanced biogenic activity, with concentrations of WSON (11.3 ± 3.3 nmol N m–3) accounting for about 84% of the total dissolved nitrogen (TDN). Such levels are similar to those observed in the polluted marine atmosphere of the eastern Mediterranean (11.6 ± 14.0 nmol N m–3). Anthropogenic activities were found to be an important source of atmospheric WSON as evidenced by the ten times higher levels in the Northern Hemisphere (NH) than in the remote Southern Hemisphere (SH). Furthermore, the higher contribution of WSON to TDN (40%) in the SH, compared to the NH (20%), underlines the important role of organic nitrogen in remote marine areas. Finally, Sahara dust was also identified as a significant source of WSON in the coarse mode aerosols of the NH.

Origin of the water-soluble organic nitrogen in the maritime aerosol

2017 ◽  
Vol 167 ◽  
pp. 97-103 ◽  
Author(s):  
Kiyoshi Matsumoto ◽  
Yuya Yamamoto ◽  
Kotaro Nishizawa ◽  
Naoki Kaneyasu ◽  
Tomohisa Irino ◽  
...  
Keyword(s):  
Organic Nitrogen ◽  
Water Soluble ◽  
Soluble Organic Nitrogen

scholarly journals Molecular characterization of water soluble organic nitrogen in marine rainwater by ultra-high resolution electrospray ionization mass spectrometry

2012 ◽  
Vol 12 (7) ◽  
pp. 3557-3571 ◽  
Author(s):  
K. E. Altieri ◽  
M. G. Hastings ◽  
A. J. Peters ◽  
D. M. Sigman
Keyword(s):  
Mass Spectrometry ◽  
Organic Matter ◽  
High Resolution ◽  
Electrospray Ionization ◽  
Organic Nitrogen ◽  
Warm Season ◽  
Cold Season ◽  
Water Soluble ◽  
Air Mass ◽  
Soluble Organic Nitrogen

Abstract. Atmospheric water soluble organic nitrogen (WSON) is a subset of the complex organic matter in aerosols and rainwater, which impacts cloud condensation processes and aerosol chemical and optical properties and may play a significant role in the biogeochemical cycle of N. However, its sources, composition, connections to inorganic N, and variability are largely unknown. Rainwater samples were collected on the island of Bermuda (32.27° N, 64.87° W), which experiences both anthropogenic and marine influenced air masses. Samples were analyzed by ultra-high resolution electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry to chemically characterize the WSON. Elemental compositions of 2281 N containing compounds were determined over the mass range m/z+ 50 to 500. The five compound classes with the largest number of elemental formulas identified, in order from the highest number of formulas to the lowest, contained carbon, hydrogen, oxygen, and nitrogen (CHON+), CHON compounds that contained sulfur (CHONS+), CHON compounds that contained phosphorus (CHONP+), CHON compounds that contained both sulfur and phosphorus (CHONSP+), and compounds that contained only carbon, hydrogen, and nitrogen (CHN+). Compared to rainwater collected in the continental USA, average O:C ratios of all N containing compound classes were lower in the marine samples whereas double bond equivalent values were higher, suggesting a reduced role of secondary formation mechanisms. Despite their prevalence in continental rainwater, no organonitrates or nitrooxy-organosulfates were detected, but there was an increased presence of organic S and organic P containing compounds in the marine rainwater. Cluster analysis showed a clear chemical distinction between samples collected during the cold season (October to March) which have anthropogenic air mass origins and samples collected during the warm season (April to September) with remote marine air mass origins. This, in conjunction with patterns identified in van Krevelen diagrams, suggests that the cold season WSON is a mixture of organic matter with both marine and anthropogenic sources while in the warm season the WSON appears to be dominated by marine sources. These findings indicate that, although the concentrations and percent contribution of WSON to total N is fairly consistent across diverse geographic regions, the chemical composition of WSON varies strongly as a function of source region and atmospheric environment.

scholarly journals Chemical Characteristics and Sources of Water-Soluble Organic Nitrogen Species in PM2.5 in Nanjing, China

Atmosphere ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 574
Author(s):  
Yue Liu ◽  
Haiwei Li ◽  
Shijie Cui ◽  
Dongyang Nie ◽  
Yanfang Chen ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Nitrogen ◽  
Chemical Characterization ◽  
Inorganic Ions ◽  
Water Soluble ◽  
Photochemical Oxidation ◽  
Secondary Source ◽  
Secondary Sources ◽  
Field Samples ◽  
Soluble Organic Nitrogen

Water-soluble organic nitrogen (WSON) is an important component of PM2.5 which may affect air quality, climate and human health. Herein, one-year field samples of atmospheric PM2.5 (June 2017–May 2018) were collected in northern Nanjing. Chemical characterization of PM2.5 major components as well as WSON were conducted, and WSON composition and sources were further investigated via measurements by a Aerodyne soot particle aerosol mass spectrometer (SP-AMS) as well as positive matrix factorization (PMF). Inorganic ions, mainly consisting of ammonium, sulfate, and nitrate, were found to dominate PM2.5 mass (58.7%), followed by organic matter (OM) (22.6%), and elemental carbon (EC) (2.1%). Water-soluble OM dominated OM (65.1%), and its temporal variation was closely correlated with that of secondary organic matter, while time series of water-insoluble OM concentrations correlated tightly with that of primary organic matter. Average WSON concentration was 2.15 μg/m3, which was highest in winter and lowest in summer. Correlation analysis of WSON with PM2.5 components also indicated that WSON was mainly from secondary sources. SP-AMS revealed that WSON mass spectrum was composed of CxHyNp+ (91.2%) and CxHyOzNp+ (8.8%), indicating dominance of amines and other oxygenated ON compounds. PMF analysis resolved two primary sources (traffic, biomass burning) and two secondary sources (less-oxidized and more-oxidized factors) of WSOM and WSON, and the secondary source dominated both WSOM and WSON. Contribution of the more-oxidized ON factor was very high in winter, and the less-oxidized factor was significant in summer, indicating a likely important role of aqueous-phase processing in winter as well as photochemical oxidation in summer to WSON.

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