Fine, ultrafine and nanoparticle trace element compositions near a major freeway with a high heavy-duty diesel fraction

Ntziachristos, Leónidas; Ning, Zhi; Geller, Michael D.; Sheesley, Rebecca J.; Schauer, James J.; Sioutas, Constantinos

doi:10.1016/j.atmosenv.2007.02.043

Cited by 138 publications

(78 citation statements)

References 59 publications

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“…An earlier study by Rodes et al (1998) found in-cabin samples for most elements to be below LOD, although the few overlapping species that were within their detectable range are within a factor of 5 of the current results. In addition, our in-cabin crustal element concentrations are similar to those previously reported in other roadside microenvironments (Ntziachristos et al 2007;Hays et al 2011), while the concentrations of anthropogenic elemental species (EF > 100) were a factor of 2-3 higher than measurements from a roadside location in North Carolina (Hays et al 2011). To our knowledge, these are the first reported measurements of incabin concentrations of particulate organic species during typical commuting activities.…”

Section: Factor Analysis Of Elements and Organic Speciessupporting

confidence: 75%

On-Roadway In-Cabin Exposure to Particulate Matter: Measurement Results Using Both Continuous and Time-Integrated Sampling Approaches

Greenwald

Bergin

Yip

et al. 2014

Aerosol Science and Technology

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The Atlanta Commuters Exposure (ACE) Study was designed to measure in-cabin exposure to roadway particulate pollution and acute health response in a panel of adults with and without asthma following a 2-h scripted route along major highways in Atlanta. This article focuses on methods and results of both continuous and integrated approaches used to measure the concentration of PM 2.5 mass, particle number concentration (PNC), black carbon (BC) mass, and particle-bound PAHs, in-cabin noise, PM elemental composition, elemental carbon, organic carbon, water-soluble organic carbon (WSOC) content, and speciation of a broad range of organic compounds including alkanes, hopanes, and PAHs. Speciated PM data indicates that in-cabin particles derive from three non-co-varying processes: the resuspension of road dust containing crustal elements and previously-deposited brake pad residue with a contribution of normal fuel combustion, incomplete combustion processes producing PAHs and carbon particles, and particles ablated from brake pads that have not previously deposited to the roadside environment. Most in-cabin pollutants were elevated during the warm season with the notable exception of PNC. PNC was not found to be correlated with most other pollutants. In-cabin concentrations were marginally higher when windows were open.

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Section: Factor Analysis Of Elements and Organic Speciessupporting

confidence: 75%

On-Roadway In-Cabin Exposure to Particulate Matter: Measurement Results Using Both Continuous and Time-Integrated Sampling Approaches

Greenwald

Bergin

Yip

et al. 2014

Aerosol Science and Technology

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“…Some general agreement on the UFPM distribution was obtained in those comparisons, although some factors such as secondary PM formation, diversity of vehicle types, and variable meteorological conditions affect UFPM near roadways but not in the laboratory. Ntziachristos et al 83 used a nano-MOUDI/ MOUDI system to collect UFPM at the same location. Sulfur (35 ng/m 3 ) and iron (35 ng/m 3 ) were the most abundant trace elements.…”

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confidence: 99%

Current Understanding of Ultrafine Particulate Matter Emitted from Mobile Sources

Seigneur

2009

Journal of the Air & Waste Management Association

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The physics and chemistry of ultrafine particulate matter (UFPM) associated with mobile source emissions is reviewed. UFPM includes those particles that are less than 0.1 m in diameter. Measurements of UFPM emitted from mobile sources have been conducted in the laboratory, on roadways, and downwind of roadways. In addition, UFPM formation and evolution have been modeled and the modeling results have been compared with available measurements. The results of those measurement programs and modeling studies are synthesized into a coherent description of the formation of UFPM in mobile source emissions and its subsequent evolution in the ambient atmosphere. Recommendations are provided to address the gaps in our current understanding of the processes leading to the formation of UFPM, its chemical composition, and its evolution in the atmosphere.

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“…In addition, this study shows that trace elements constitute a small fraction of PM mass in nanoparticle size rang with high importance to human health (Ntziachristos et al 2007). Handler et al (2008) have reported that trace metal emissions (As, Ba, Cd, Co, Cr, Cu, Mn, Ni, Pb, Sb, Sr, Ti, V, Zn) contributed less than 1 % of total emissions in all size fractions.…”

Section: Introductionmentioning

confidence: 71%

Trace elements in size-segregated urban aerosol in relation to the anthropogenic emission sources and the resuspension

Đorđević

Stortini

Relić

et al. 2014

Environ Sci Pollut Res

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Fine, ultrafine and nanoparticle trace element compositions near a major freeway with a high heavy-duty diesel fraction

Cited by 138 publications

References 59 publications

On-Roadway In-Cabin Exposure to Particulate Matter: Measurement Results Using Both Continuous and Time-Integrated Sampling Approaches

On-Roadway In-Cabin Exposure to Particulate Matter: Measurement Results Using Both Continuous and Time-Integrated Sampling Approaches

Current Understanding of Ultrafine Particulate Matter Emitted from Mobile Sources

Trace elements in size-segregated urban aerosol in relation to the anthropogenic emission sources and the resuspension

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