scholarly journals Size-segregated particulate matter and carboxylic acids over urban and rural sites in Londrina City, Brazil

2012 ◽  
Vol 23 (5) ◽  
pp. 921-930 ◽  
Author(s):  
Adriana de M. Freitas ◽  
Leila D. Martins ◽  
Maria Cristina Solci
Keyword(s):  
Particulate Matter ◽  
Carboxylic Acids ◽  
Rural Sites

scholarly journals Multi-Oxygenated Organic Compounds in Fine Particulate Matter Collected in the Western Mediterranean Area

Atmosphere ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 94
Author(s):  
Esther Borrás ◽  
Luis Antonio Tortajada-Genaro ◽  
Francisco Sanz ◽  
Amalia Muñoz
Keyword(s):  
Particulate Matter ◽  
Carboxylic Acids ◽  
Organic Compounds ◽  
Organic Pollutants ◽  
Mediterranean Area ◽  
Western Mediterranean ◽  
Anthropogenic Sources ◽  
Gas Chromatography Mass Spectrometry ◽  
Industrial Emissions ◽  
Tetradecanoic Acid

The chemical characterization of aerosols, especially fine organic fraction, is a relevant atmospheric challenge because their composition highly depends on localization. Herein, we studied the concentration of multi-oxygenated organic compounds in the western Mediterranean area, focusing on sources and the effect of air patterns. The organic aerosol fraction ranged 3–22% of the total organic mass in particulate matter (PM)2.5. Seventy multi-oxygenated organic pollutants were identified by gas chromatography–mass spectrometry, including n-alkanones, n-alcohols, anhydrosugars, monocarboxylic acids, dicarboxylic acids, and keto-derivatives. The highest concentrations were found for carboxylic acids, such as linoleic acid, tetradecanoic acid and, palmitic acid. Biomarkers for vegetation sources, such as levoglucosan and some fatty acids were detected at most locations. In addition, carboxylic acids from anthropogenic sources—mainly traffic and cooking—have been identified. The results indicate that the organic PM fraction in this region is formed mainly from biogenic pollutants, emitted directly by vegetation, and from the degradation products of anthropogenic and biogenic volatile organic pollutants. Moreover, the chemical profile suggested that this area is interesting for aerosol studies because several processes such as local costal breezes, industrial emissions, and desert intrusions affect fine PM composition.

Simultaneous determination of trace concentrations of aldehydes and carboxylic acids in particulate matter

2018 ◽  
Vol 1544 ◽  
pp. 49-61 ◽  
Author(s):  
Jana Rousová ◽  
Manikyala R. Chintapalli ◽  
Anastasia Lindahl ◽  
Jana Casey ◽  
Alena Kubátová
Keyword(s):  
Particulate Matter ◽  
Simultaneous Determination ◽  
Carboxylic Acids ◽  
Trace Concentrations

Spatial Variability of Different Fractions of Particulate Matter within an Urban Environment and between Urban and Rural Sites

2000 ◽  
Vol 50 (7) ◽  
pp. 1115-1124 ◽  
Author(s):  
Martin Röösli ◽  
Charlotte Braun-Fährlander ◽  
Nino Künzli ◽  
Lucy Oglesby ◽  
Gaston Theis ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Spatial Variability ◽  
Urban Environment ◽  
Rural Sites

scholarly journals Characterization and source apportionment of organic aerosol using offline aerosol mass spectrometry

2016 ◽  
Vol 9 (1) ◽  
pp. 23-39 ◽  
Author(s):  
K. R. Daellenbach ◽  
C. Bozzetti ◽  
A. Křepelová ◽  
F. Canonaco ◽  
R. Wolf ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Source Apportionment ◽  
Organic Aerosol ◽  
Transmission Efficiency ◽  
Water Soluble ◽  
Spatially Resolved ◽  
Aerosol Mass ◽  
Online Measurements ◽  
Rural Sites ◽  
Pm2.5 And Pm10

Abstract. Field deployments of the Aerodyne Aerosol Mass Spectrometer (AMS) have significantly advanced real-time measurements and source apportionment of non-refractory particulate matter. However, the cost and complex maintenance requirements of the AMS make its deployment at sufficient sites to determine regional characteristics impractical. Furthermore, the negligible transmission efficiency of the AMS inlet for supermicron particles significantly limits the characterization of their chemical nature and contributing sources. In this study, we utilize the AMS to characterize the water-soluble organic fingerprint of ambient particles collected onto conventional quartz filters, which are routinely sampled at many air quality sites. The method was applied to 256 particulate matter (PM) filter samples (PM1, PM2.5, and PM10, i.e., PM with aerodynamic diameters smaller than 1, 2.5, and 10 µm, respectively), collected at 16 urban and rural sites during summer and winter. We show that the results obtained by the present technique compare well with those from co-located online measurements, e.g., AMS or Aerosol Chemical Speciation Monitor (ACSM). The bulk recoveries of organic aerosol (60–91 %) achieved using this technique, together with low detection limits (0.8 µg of organic aerosol on the analyzed filter fraction) allow its application to environmental samples. We will discuss the recovery variability of individual hydrocarbon ions, ions containing oxygen, and other ions. The performance of such data in source apportionment is assessed in comparison to ACSM data. Recoveries of organic components related to different sources as traffic, wood burning, and secondary organic aerosol are presented. This technique, while subjected to the limitations inherent to filter-based measurements (e.g., filter artifacts and limited time resolution) may be used to enhance the AMS capabilities in measuring size-fractionated, spatially resolved long-term data sets.

scholarly journals Spatial and Temporal Variation in Fine Particulate Matter Mass and Chemical Composition: The Middle East Consortium for Aerosol Research Study

2014 ◽  
Vol 2014 ◽  
pp. 1-16 ◽  
Author(s):  
Ziad Abdeen ◽  
Radwan Qasrawi ◽  
Jongbae Heo ◽  
Bo Wu ◽  
Jacob Shpund ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Middle East ◽  
Research Study ◽  
Fine Particulate Matter ◽  
Dust Storms ◽  
Spatial And Temporal Variation ◽  
Chemical Components ◽  
Fine Particulate ◽  
Rural Sites ◽  
Major Chemical

Ambient fine particulate matter (PM2.5) samples were collected from January to December 2007 to investigate the sources and chemical speciation in Palestine, Jordan, and Israel. The 24-h PM2.5samples were collected on 6-day intervals at eleven urban and rural sites simultaneously. Major chemical components including metals, ions, and organic and elemental carbon were analyzed. The mass concentrations of PM2.5across the 11 sites varied from 20.6 to 40.3 μg/m3, with an average of 28.7 μg/m3. Seasonal variation of PM2.5concentrations was substantial, with higher average concentrations (37.3 μg/m3) in the summer (April–June) months compared to winter (October–December) months (26.0 μg/m3) due mainly to high contributions of sulfate and crustal components. PM2.5concentrations in the spring were greatly impacted by regional dust storms. Carbonaceous mass was the most abundant component, contributing 40% to the total PM2.5mass averaged across the eleven sites. Crustal components averaged 19.1% of the PM2.5mass and sulfate, ammonium, and nitrate accounted for 16.2%, 6.4%, and 3.7%, respectively, of the total PM2.5mass. The results of this study demonstrate the need to better protect the health and welfare of the residents on both sides of the Jordan River in the Middle East.

scholarly journals Composition and sources of fine particulate matter across urban and rural sites in the Midwestern United States

2014 ◽  
Vol 16 (6) ◽  
pp. 1360-1370 ◽  
Author(s):  
Shuvashish Kundu ◽  
Elizabeth A. Stone
Keyword(s):  
United States ◽  
Particulate Matter ◽  
Fine Particulate Matter ◽  
Midwestern United States ◽  
Fine Particulate ◽  
Rural And Urban ◽  
Rural Sites

The composition and sources of fine particulate matter (PM2.5) were investigated in rural and urban locations in Iowa, located in the agricultural and industrial Midwestern United States, from April 2009 to December 2012.

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