WSOC and Its Relationship with BC, Levoglucosan and Transition Metals in the PM2.5 of an Urban Area in the Amazon

Water-soluble organic carbon (WSOC) makes up a large mass fraction of the organic carbon in the aerosol and can influence important cloud processes in the atmosphere. The capacity of WSOC to form metallic complexes with transition metals is well known; however, its influence on the aerosol of urban areas in the Amazon region is not very well known. In this study, we investigated the relationship between WSOC, black carbon (BC), levoglucosan (LEV) and transition metals (Fe, Cu and Mn) present in the PM2.5 (particles with a diameter smaller than 2.5 µm) of an urban environment during the dry season in the central Amazon. Oxalic acid (C2) was used to identify the influence of transition metals on WSOC. The mean mass concentration value of the PM2.5 was 14.72 μg m-3 (2.11-31.68 μg m-3). The WSOC made up 58.34% of the PM2.5 mass, followed by BC (20.28%), and LEV (2.62%). The WSOC showed significant correlation with the transition metals analyzed (> 0.56), especially Mn with C2 (linear coefficient (R2 ) = 0.74). A multiple linear regression with WSOC, BC and LEV showed a strong linear correlation between them (R2 = 0.86), indicating the influence of biomass burning and vehicle traffic on the organic aerosol.

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The Relationship between the Estimated Water Content and Water Soluble Organic Carbon in PM10 at Seoul, Korea

Journal of Korean Society for Atmospheric Environment ◽

10.5572/kosae.2017.33.1.064 ◽

2017 ◽

Vol 33 (1) ◽

pp. 64-74 ◽

Cited By ~ 1

Author(s):

Seung Ha Lee ◽

Yong Pyo Kim ◽

Ji Yi Lee ◽

Seung Muk Lee

Keyword(s):

Organic Carbon ◽

Water Content ◽

Water Soluble ◽

Water Soluble Organic Carbon ◽

Soluble Organic Carbon ◽

The Relationship

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Role of transition metals with water soluble organic carbon in the formation of secondary organic aerosol and metallo‐organics in PM1 sampled during post monsoon and pre-winter time

Journal of Aerosol Science ◽

10.1016/j.jaerosci.2016.01.002 ◽

2016 ◽

Vol 94 ◽

pp. 56-69 ◽

Cited By ~ 16

Author(s):

Dharmendra Kumar Singh ◽

Tarun Gupta

Keyword(s):

Organic Carbon ◽

Transition Metals ◽

Secondary Organic Aerosol ◽

Organic Aerosol ◽

Water Soluble ◽

Post Monsoon ◽

Water Soluble Organic Carbon ◽

Soluble Organic Carbon ◽

Winter Time

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Organic Molecular Tracers in PM2.5 at Urban Sites during Spring and Summer in Japan: Impact of Secondary Organic Aerosols on Water-Soluble Organic Carbon

Atmosphere ◽

10.3390/atmos12050579 ◽

2021 ◽

Vol 12 (5) ◽

pp. 579

Author(s):

Fumikazu Ikemori ◽

Rie Nishimura ◽

Shinji Saito ◽

Masayuki Akiyama ◽

Shigekazu Yamamoto ◽

...

Keyword(s):

Organic Carbon ◽

Urban Areas ◽

Secondary Organic Aerosols ◽

Organic Aerosols ◽

Water Soluble ◽

Gas Chromatography Mass Spectrometry ◽

Water Soluble Organic Carbon ◽

Soluble Organic Carbon ◽

Molecular Tracers ◽

Urban Sites

To understand the characteristics of secondary organic aerosols (SOAs) and estimate their impact on water-soluble organic carbon (WSOC) in urban areas in Japan, we measured 17 organic tracers using gas chromatography–mass spectrometry from particulate matter with an aerodynamic diameter smaller than 2.5 μm collected at five urban sites in Japan during spring and summer. Most anthropogenic, monoterpene-derived, and isoprene-derived SOA tracers showed meaningful correlations with potential ozone in both these seasons. These results indicate that oxidants play an important role in SOAs produced during both seasons in urban cities in Japan. WSOC was significantly affected by anthropogenic and monoterpene-derived SOAs during spring and three SOA groups during summer at most of the sites sampled. The total estimated secondary organic carbons (SOCs), including mono-aromatic, di-aromatic, monoterpene-derived, and isoprene-derived SOCs, could explain the WSOC fractions of 39–63% in spring and 46–54% in summer at each site. Notably, monoterpene-derived and mono-aromatic SOCs accounted for most of the total estimated SOCs in both spring (85–93%) and summer (75–82%) at each site. These results indicate that SOAs significantly impact WSOC concentrations during both these seasons at urban sites in Japan.

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