Organic compound source profiles of PM2.5 from traffic emissions, coal combustion, industrial processes and dust

Yingze Tian; Xiao Liu; Ruiqing Huo; Zongbo Shi; Yueming Sun; Yinchang Feng; Roy M Harrison

doi:10.1016/j.chemosphere.2021.130429

Organic compound source profiles of PM_2.5 from traffic emissions, coal combustion, industrial processes and dust

Chemosphere. 2021 Sep:278:130429. doi: 10.1016/j.chemosphere.2021.130429. Epub 2021 Mar 31.

Authors

Yingze Tian¹, Xiao Liu², Ruiqing Huo², Zongbo Shi³, Yueming Sun², Yinchang Feng², Roy M Harrison⁴

Affiliations

¹ State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China. Electronic address: tianyingze@hotmail.com.
² State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China.
³ School of Geography Earth and Environmental Science, University of Birmingham, Birmingham, B15 2TT, UK.
⁴ School of Geography Earth and Environmental Science, University of Birmingham, Birmingham, B15 2TT, UK. Electronic address: r.m.harrison@bham.ac.uk.

PMID: 34126680
DOI: 10.1016/j.chemosphere.2021.130429

Abstract

Eighteen polycyclic aromatic hydrocarbons (PAHs), 24 n-alkanes, 7 hopanes, 2 cholestanes, inorganic ions, elements and carbon fractions were analyzed in real-world source samples of PM_2.5 (fine particulate matter) from traffic emissions (gasoline vehicles-TGV, diesel vehicles-TDV, diesel ship-TDS, and heavy oil ships-THOS), coal combustion (coal-fired industrial boilers-CIB, power plants-CPP, and residential stoves-CRS), industrial process emissions (cement industry-IPCI, and steel industry-IPSI), and dust (soil dust-DSD, road dust-DRD, and construction dust-DCD). High molecular weight (sum of five to seven rings) PAHs accounted for higher fractions for TGV (80%) and THS (61%) than for TDV, TDS and coal combustion sources (31%-47%). Hopane ratios (C29αβ/C30αβ) in coal related sources were mostly higher than 1, whereas that of traffic emissions was lower than 1. The homohopane index [S/(S + R)], which is a useful index for identifying the maturity of fuels, ranked as TGV > THS > TDV and TDS > coal combustion. For n-alkane profiles, coal related sources showed peaks at C16-C19, TDV, TDS and THS showed similar peaks at C17-C25, but peaks for DSD (C30-C32), DRD (C17-C20, C24-25 and C30-C31), CRS (C16-C18 and C28-C29) and TGV (C24-C26) are different. Organic markers were selected which can best differentiate the subtypes within source categories by considering the component levels and variations. Through a comprehensive review, we showed that it is inadvisable to directly use diagnostic ratios for source attribution, although their trends can assist in identifying influential sources.

Keywords: Coal combustion; Industrial processes; Organic compounds; PM(2.5); Source profiles; Traffic emissions.

Publication types

Review

MeSH terms

Air Pollutants* / analysis
Coal / analysis
Dust / analysis
Environmental Monitoring
Particulate Matter / analysis
Polycyclic Aromatic Hydrocarbons* / analysis
Vehicle Emissions / analysis

Substances

Air Pollutants
Coal
Dust
Particulate Matter
Polycyclic Aromatic Hydrocarbons
Vehicle Emissions