Characterization, identification of road dust PAHs in central Shanghai areas, China

Liu, M.; Cheng, Shuai; Dong-ni, OU; Hou, Lijun; Gao, Lei; Wang, L.L.; Xie, Yuning; Yang, Yi; Xu, Shiyuan

doi:10.1016/j.atmosenv.2007.07.059

Cited by 200 publications

(64 citation statements)

References 34 publications

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“…The evaporation of PAHs from contaminated ground during warm months was an additional reason for the different PAH levels between the urban and suburban sites (Li et al 2006). Liu et al (2007) recently reported an obviously spatial distribution of PAH concentration in road dust among various functional areas in Shanghai.…”

Section: Seasonal Variations Of Pah Concentrationsmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons in the atmosphere of Shanghai, China

Chen

Feng

Xiong

et al. 2010

Environ Monit Assess

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Shanghai is the largest industrial and commercial city in China, and its air quality has been concerned for several years. However, scarce study had been made on the seasonal levels of atmospheric polycyclic aromatic hydrocarbons (PAHs), together with their gas-particle partitioning and potential emission sources. Based on an intensive sampling campaign at urban and suburban areas in Shanghai during four seasons of [2005][2006], this study presented the measurement of PAH concentrations in both particulate and gaseous phases, as well as seasonal and spatial variability. The results showed that the annual PAH levels (gas + particle) were 167 ± at the suburban site. Gaseous PAHs (>70%) dominated the total PAH mass at both sites, while particulate PAHs contributed more than 90% of the toxic power according to benzo(a)pyreneequivalent carcinogenic parameter. Different seasonal trend of PAH concentrations was observed between the two sites, and it may be explained by complicated factors such as sampling heights, local/regional emission sources, and climatic conditions. The gas-particle partitioning of PAHs in all samples was calculated, and strong linear correlations between log K p and log P o L were observed, with shallower slopes (m r ) at the suburban site than the urban one and in warm season than the cold months, indicating the different equilibrium conditions of PAHs in spatial and seasonal scales in Shanghai. The slope (m r = −0.96) and correlation coefficient (R 2 = 0.81) for four-ring PAHs were closest to theoretical equilibrium conditions among compounds with various aromatic rings. Finally, the potential PAH sources were estimated based on principal factor analysis with multiple linear regressions. Ground volatilization dominated the PAH pollutions at both sites, while vehicles and coal consumption were the other main emission sources, which totally contributed 32.0% (suburban) to 49.2% (urban) of PAH mass in Shanghai atmosphere. The effects of wood and biomass burning were also detected, but their contributions to PAHs were negligible. Environ Monit Assess (2011) 172:235-247

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Section: Seasonal Variations Of Pah Concentrationsmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons in the atmosphere of Shanghai, China

Chen

Feng

Xiong

et al. 2010

Environ Monit Assess

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“…In addition, they could exhibit a similar distribution pattern among other phases because of their comparable thermodynamic partitioning and kinetic mass transfer coefficients (Dickhut et al, 2000;Zhu et al, 2015). The isomer ratios Flt/(Flt + PYR), Ant/(Ant + Phe), BaA/(BaA + Chr) for particulate PAHs were usually employed to determine the possible sources of PAHs (Dickhut et al, 2000;Yunker et al, 2002;Liu et al, 2007;Zhu et al, 2015). The calculated isomer ratios are (Budzinski et al, 1997;Yunker et al, 2002;Liu et al, 2007).…”

Section: Source Apportionment Of Pahs Diagnostic Ratiosmentioning

confidence: 99%

“…The isomer ratios Flt/(Flt + PYR), Ant/(Ant + Phe), BaA/(BaA + Chr) for particulate PAHs were usually employed to determine the possible sources of PAHs (Dickhut et al, 2000;Yunker et al, 2002;Liu et al, 2007;Zhu et al, 2015). The calculated isomer ratios are (Budzinski et al, 1997;Yunker et al, 2002;Liu et al, 2007). In this study, the Flt/(Flt + PYR) ratios were greater than 0.5 at all sites.…”

Section: Source Apportionment Of Pahs Diagnostic Ratiosmentioning

confidence: 99%

PM2.5-Bound PAHs in Indoor and Outdoor of Hotels in Urban and Suburban of Jinan, China: Concentrations, Sources, and Health Risk Impacts

Yang

Chen³

et al. 2017

Aerosol Air Qual. Res.

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The relationships between polycyclic aromatic hydrocarbons (PAHs) in PM 2.5 in outdoor and indoor environments of hotels were examined in Jinan, China from January 6, 2016 to January 29, 2016. The mean concentrations of ∑PAHs for all sampling sites showed the following ascending order: suburban indoor (SUI, 39.58 and SUI were all less than 1, indicating that the PAHs were mainly infiltrated from the outdoor environment. At URI 2 , 2-ring and some 3-and 4-ring PAHs were mainly produced indoors due to cooking, whereas the 5-7-ring PAHs were mainly infiltrated from the outdoor environment. The diagnostic ratios and principal component analysis indicated that emissions from combustion of coal, biomass, diesel fuel and gasoline were the main sources of PAHs in the study area. The impacts of health risk assessment of PAHs suggested that the health risks in the outdoor environment were more severe than those in the indoor environment and the health risks in urban area were significantly higher than those in the suburban area in Jinan.

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“…Moreover, it has recently been revealed that both marine and nonmarine K-T BIRs contain carbon cenospheres, which are known only to be formed by combustion of hydrocarbon material (9). pPAHs can arise from a variety of combustion sources, especially partial combustion of vegetation (10,11), coal (12) and oil (13), whereby modern pPAH signatures may be traceable to their source (14). Wildfire is the dominant source of pPAHs in the fossil record throughout the majority of geological time, as a contribution from combustion of hydrocarbons is likely to be limited before anthropogenic inputs (15).…”

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confidence: 99%

Geochemical evidence for combustion of hydrocarbons during the K-T impact event

Belcher¹,

Finch

Collinson³

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

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It has been proposed that extensive wildfires occurred after the Cretaceous-Tertiary (K-T) impact event. An abundance of soot and pyrosynthetic polycyclic aromatic hydrocarbons (pPAHs) in marine K-T boundary impact rocks (BIRs) have been considered support for this hypothesis. However, nonmarine K-T BIRs, from across North America, contain only rare occurrences of charcoal yet abundant noncharred plant remains. pPAHs and soot can be formed from a variety of sources, including partial combustion of vegetation and hydrocarbons whereby modern pPAH signatures are traceable to their source. We present results from multiple nonmarine K-T boundary sites from North America and reveal that the K-T BIRs have a pPAH signature consistent with the combustion of hydrocarbons and not living plant biomass, providing further evidence against K-T wildfires and compelling evidence that a significant volume of hydrocarbons was combusted during the K-T impact event.

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Characterization, identification of road dust PAHs in central Shanghai areas, China

Cited by 200 publications

References 34 publications

Polycyclic aromatic hydrocarbons in the atmosphere of Shanghai, China

Polycyclic aromatic hydrocarbons in the atmosphere of Shanghai, China

PM2.5-Bound PAHs in Indoor and Outdoor of Hotels in Urban and Suburban of Jinan, China: Concentrations, Sources, and Health Risk Impacts

Geochemical evidence for combustion of hydrocarbons during the K-T impact event

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