Distribution characteristics of polycyclic aromatic hydrocarbons with particle size in urban aerosols at the roadside in Ho Chi Minh City, Vietnam

Hiền, Tô Thị; Thanh, Le Tu; Kameda, Takayuki; Takenaka, Norimichi; Bandow, Hiroshi

doi:10.1016/j.atmosenv.2006.10.045

Cited by 85 publications

(67 citation statements)

References 42 publications

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“…As the number of PAHs' aromatic rings increases, the intensities of two peaks vary a lot, i.e., the accumulation mode peak increases, while the coarse-mode peak decreases and even disappears in five-and six-ring PAHs. This is due to the fact that less volatile PAH species preferentially condense on fine particles and more volatile ones are inhibited on smaller particles because of the Kelvin effect (Hien et al, 2007;Keshtkar and Ashbaugh, 2007). This kind of mode distribution that appears in Shanghai is similar to those found in Mumbai, India (Venkataraman et al, 1999), but different from those in Boston, MA (Allen et al, 1996).…”

Section: Occurrence and Size Distribution Of Pahsmentioning

confidence: 99%

Size distributions of polycyclic aromatic hydrocarbons in urban atmosphere: sorption mechanism and source contributions to respiratory deposition

et al. 2016

Atmos. Chem. Phys.

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Abstract. In order to better understand the particle size distribution of polycyclic aromatic hydrocarbons (PAHs) and their source contribution to human respiratory system, sizeresolved PAHs have been studied in ambient aerosols at a megacity Shanghai site during a 1-year period (2012)(2013). The results showed the PAHs had a bimodal distribution with one mode peak in the fine-particle size range (0.4-2.1 µm) and another mode peak in the coarse-particle size range (3.3-9.0 µm). Along with the increase in ring number of PAHs, the intensity of the fine-mode peak increased, while the coarsemode peak decreased. Plotting of log(PAH / PM) against log(D p ) showed that all slope values were above −1, suggesting that multiple mechanisms (adsorption and absorption) controlled the particle size distribution of PAHs. The total deposition flux of PAHs in the respiratory tract was calculated as being 8.8 ± 2.0 ng h −1 . The highest lifetime cancer risk (LCR) was estimated at 1.5 × 10 −6 , which exceeded the unit risk of 10 −6 . The LCR values presented here were mainly influenced by accumulation mode PAHs which came from biomass burning (24 %), coal combustion (25 %), and vehicular emission (27 %). The present study provides us with a mechanistic understanding of the particle size distribution of PAHs and their transport in the human respiratory system, which can help develop better source control strategies.

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Section: Occurrence and Size Distribution Of Pahsmentioning

confidence: 99%

Size distributions of polycyclic aromatic hydrocarbons in urban atmosphere: sorption mechanism and source contributions to respiratory deposition

et al. 2016

Atmos. Chem. Phys.

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“…Table 4 (Ćwiklak et al, 2009). Majority of ambient PAH, especially in urbanized areas, are anthropogenic (Kulkarni & Venkataraman, 2000;Hien et al, 2007;Wang X.H. et al, 2007), and come mainly from combustion of fossil fuels, wastes or biomass and also from industry and road traffic.…”

Section: Comparison Of the Concentrations Of Pm-and Pm-bound Pah In Zmentioning

confidence: 99%

The Mass Distribution of Particle-Bound PAH Among Aerosol Fractions: A Case-Study of an Urban Area in Poland

Rogula–Kozłowska¹,

Kozielska²,

Błaszczak³

et al. 2012

Organic Pollutants Ten Years After the Stockholm Convention - Environmental and Analytical Update

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“…Interaction and partitioning between the gas and particle phase also depend on particle size (Kadowaki, 1994;Fraser et al, 1997). For example, less volatile organic compounds such as polycyclic aromatic hydrocarbons are more likely associated with fine particles (Hien et al, 2007;Ladji et al, 2014). More importantly, particle size greatly influences the health impacts of aerosols because fine particles can penetrate deep into lungs and bloodstream.…”

Section: Introductionmentioning

confidence: 99%

“…Research on the size of aerosol particles and their chemical compositions is critical to the understanding of their atmospheric properties and effects on health and to the elucidation of their sources and environmental sinks. Most available studies were conducted to investigate the particle size distribution of PAHs (Offenberg and Baker, 1999;Hien et al, 2007), n-alkanes (Karanasiou et al, 2007), inorganic elements (Balachandran et al, 2000) and water-soluble compounds (Bao et al, 2009) in urban and rural areas, but knowledge has remained limited in the size distribution of particle bounded n-alkanes in typical haze episodes.…”

Section: Introductionmentioning

confidence: 99%

Particulate Size Distribution and Sources Evaluation of n-Alkanes during Long-Term Haze Episode around Chaohu Lake, Eastern China

Wang

Liu

et al. 2017

Aerosol Air Qual. Res.

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ABSTRACTn-Alkanes (from nC 16 to nC 32 ) associated with particulate matters were determined in the ambient air around Chaohu Lake, Eastern China, from October to December in 2014 during a long-term haze episode. The total concentrations of particle bounded n-alkanes varied from 332 to 2500 ng m -3 , with the homologues of nC 24 -nC 30 the most abundant species. Spatial analysis revealed that low concentrations of n-alkanes existed at the sites close to Chaohu Lake, while high concentrations were generally at locations distant from the lake. For all aggregated fractions, most n-alkanes were distributed in fine particles with the mean geometric mean diameter (GMD) varying from 3.0 ± 0.6 µm for nC 16 to 2.1 ± 0.6 µm for nC 32 . Short chain n-alkanes were accumulated in coarse particles with a unimodal distribution, but long chain aliphatic hydrocarbons appeared to have a biomodal distribution in fine and coarse particles. The mass size distribution of individual n-alkane homologue was predominantly influenced by its volatility; thus GMDs were well correlated with the logarithmically transformed subcooled liquid vapor pressures (P L o , Pa) of n-alkanes at each sampling site, following the equation: GMDs = m g LogP L o + b g . Furthermore, m g and b g obtained from all locations tended to exhibit a significant linear correlation. This suggests that all saturated aliphatic hydrocarbons follow a similar accumulation mode during a haze episode, which allows us to predict the size distribution and GMD of a compound based on its P L o .

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Distribution characteristics of polycyclic aromatic hydrocarbons with particle size in urban aerosols at the roadside in Ho Chi Minh City, Vietnam

Cited by 85 publications

References 42 publications

Size distributions of polycyclic aromatic hydrocarbons in urban atmosphere: sorption mechanism and source contributions to respiratory deposition

Size distributions of polycyclic aromatic hydrocarbons in urban atmosphere: sorption mechanism and source contributions to respiratory deposition

The Mass Distribution of Particle-Bound PAH Among Aerosol Fractions: A Case-Study of an Urban Area in Poland

Particulate Size Distribution and Sources Evaluation of n-Alkanes during Long-Term Haze Episode around Chaohu Lake, Eastern China

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