Inhalation exposure of traffic police officers to polycyclic aromatic hydrocarbons (PAHs) during the winter in Beijing, China

Liu, Yanan; Tao, Shu; Yang, Yue; Dou, Hongwei; Yang, Yu; Coveney, Raymond M.

doi:10.1016/j.scitotenv.2007.05.008

Cited by 72 publications

(34 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth noting that the Ph / Tot ratio was also relatively high in summer. A previous study reported that a great amount of naphthalene obtained in Beijing is an important raw material for the substantial formation of phthalic acid (Liu et al, 2007). Therefore, increased ambient temperatures and stronger solar radiation in summertime facilitate the transformation of gaseous polycyclic aromatic hydrocarbons (PAHs; e.g.…”

Section: Correlation Analysis and Seasonal Variations In Concentratiomentioning

confidence: 99%

Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and α-dicarbonyls in PM2.5 from Beijing, China

et al. 2018

View full text Add to dashboard Cite

Abstract. This study investigates the seasonal variation, molecular distribution and stable carbon isotopic composition of diacids, oxocarboxylic acids and α-dicarbonyls to better understand the sources and formation processes of fine aerosols (PM 2.5 ) in Beijing. The concentrations of total dicarboxylic acids varied from 110 to 2580 ng m −3 , whereas oxoacids (9.50-353 ng m −3 ) and dicarbonyls (1.50-85.9 ng m −3 ) were less abundant. Oxalic acid was found to be the most abundant individual species, followed by succinic acid or occasionally by terephthalic acid (tPh), a plastic waste burning tracer. Ambient concentrations of phthalic acid (37.9 ± 27.3 ng m −3 ) and tPh (48.7 ± 51.1 ng m −3 ) were larger in winter than in other seasons, illustrating that fossil fuel combustion and plastic waste incineration contribute more to wintertime aerosols. The year-round mass concentration ratios of malonic acid to succinic acid (C 3 / C 4 ) were relatively low by comparison with those in other urban aerosols and remote marine aerosols. The values were less than or equal to unity in Beijing, implying that the degree of photochemical formation of diacids in Beijing is insignificant. Moreover, strong correlation coefficients of major oxocarboxylic acids and α-dicarbonyls with nss-K + suggest that biomass burning contributes significantly to these organic acids and related precursors. The mean δ 13 C value of succinic acid is the highest among all species, with values of −17.1 ± 3.9 ‰ (winter) and −17.1 ± 2.0 ‰ (spring), while malonic acid is more enriched in 13 C than others in autumn (−17.6 ± 4.6 ‰) and summer (−18.7 ± 4.0 ‰). The δ 13 C values of major species in Beijing aerosols are generally lower than those in the western North Pacific atmosphere, the downwind region, which indicates that stable carbon isotopic compositions of diacids depend on their precursor sources in Beijing. Therefore, our study demonstrates that in addition to photochemical oxidation, high abundances of diacids, oxocarboxylic acids and α-dicarbonyls in Beijing are largely associated with anthropogenic primary emissions, such as biomass burning, fossil fuel combustion and plastic waste burning.

show abstract

Section: Correlation Analysis and Seasonal Variations In Concentratiomentioning

confidence: 99%

Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and α-dicarbonyls in PM2.5 from Beijing, China

et al. 2018

View full text Add to dashboard Cite

show abstract

“…This risk scale was 2-3 times the risk of sintering workers in Taiwan (Lin et al, 2008), less than the workers in a carbon black factory (Tsai et al, 2001), and approximately 10% that of workers in 2 foundries (Liu et al, 2010) in Taiwan. The risk was 2-3 fold higher than the risk of Beijing traffic police officers (approximately 4.16 × 10 −4 -5.83 × 10 −4 ) (Liu et al, 2007b).…”

Section: Risk Assessment Due To Exposure To Pahsmentioning

confidence: 72%

“…The PAH exposure level for the TAs in Tianjin is higher than the PAH exposure level of traffic policemen in Budapest (Szaniszló and Ungváry, 2001) and in Beijing (Liu et al, 2007a(Liu et al, , 2007bZhang et al, 2006). The highway toll station staff has a long exposure time and more direct exposure, and the Beijing traffic police during the summer study period encounter volatile gaseous compounds caused mainly by the traffic.…”

Section: Exposure Level Of Pahsmentioning

confidence: 85%

“…Another personal exposure investigation performed among 44 traffic policemen and 45 office policemen in Bangkok, Thailand found that PAH exposure among traffic policemen (72.79 ng/m 3 ) was much higher than exposure levels for office staff (6.88 ng/m 3 ) (Ruchirawa et al, 2002). In China, Liu et al (2007bLiu et al ( , 2007c reported the PAH exposure levels for policeman in Beijing, and the results showed that exposure levels to 16 gaseous and particulate PAHs for the traffic police were found to be (1525 ± 759) and (148 ± 118) ng/m 3 , respectively, representing 2-2.5 times higher levels than at the control sites. The daily inhalation exposure of policeman was about 277 ng/(kg·day).…”

Section: Introductionmentioning

confidence: 99%

“…In this study, using survey questionnaires, personal sampling and chemical analysis, the PAH exposure level and profile were investigated and exposure risk was then assessed by Monte Carlo simulation (Hu et al, 2007;Liu et al, 2007b). Based on the characterization of the exposure profile and the personal exposure database, the data was rearranged by the principal component analysis method (Larsen and Baker, 2003;Manoli et al, 2004) and the contribution of major sources to the inhalation exposure could be derived.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exposure measurement, risk assessment and source identification for exposure of traffic assistants to particle-bound PAHs in Tianjin, China

Xue

You

et al. 2014

Journal of Environmental Sciences

View full text Add to dashboard Cite

a b s t r a c tTo investigate the levels of exposure to particulate-bound polycyclic aromatic hydrocarbon (PAH) and to estimate the risk these levels pose to traffic assistants (TAs) in Tianjin (a megacity in North China), a measurement campaign (33 all-day exposure samples, 25 occupational-exposure samples and 10 indoor samples) was conducted to characterize the TAs' exposure to PAHs, assess the cancer risk and identify the potential sources of exposure. The average total exposure concentration of 14 PAHs was approximately 2871 ± 928 ng/m 3 (on-duty), and 1622 ± 457 ng/m 3 (all-day). The indoor PAHs level was 1257 ± 107 ng/m 3 . After 8000 Monte Carlo simulations, the cancer risk resulting from exposure to PAHs was found to be approximately 1.05 × 10 −4 . A multivariate analysis was applied to identify the potential sources, and the results showed that, in addition to vehicle exhaust, coal combustion and cooking fumes were also another two important contributors to personal PAH exposure. The diagnostic ratios of PAH compounds agree with the source apportionment results derived from principal component analysis.

show abstract

Recent analytical methods for atmospheric polycyclic aromatic hydrocarbons and their derivatives

Hayakawa

Tang

Toriba

2016

Biomedical Chromatography

View full text Add to dashboard Cite

Polycyclic aromatic hydrocarbons (PAHs) and nitropolycyclic aromatic hydrocarbons (NPAHs) are ubiquitous environmental pollutants. Moreover, some oxidative metabolites of these pollutants, such as hydroxylated and epoxide PAHs, cause endocrine disruption or produce reactive oxygen species. These compounds have become a large concern from the viewpoint of particulate matter (PM ) pollution. This report deals with recent studies concerning analytical methods for PAHs, NPAHs and related compounds in atmospheric and biological samples.

show abstract

Inhalation exposure of traffic police officers to polycyclic aromatic hydrocarbons (PAHs) during the winter in Beijing, China

Cited by 72 publications

References 20 publications

Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and <i>α</i>-dicarbonyls in PM<sub>2.5</sub> from Beijing, China

Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and <i>α</i>-dicarbonyls in PM<sub>2.5</sub> from Beijing, China

Exposure measurement, risk assessment and source identification for exposure of traffic assistants to particle-bound PAHs in Tianjin, China

Recent analytical methods for atmospheric polycyclic aromatic hydrocarbons and their derivatives

Contact Info

Product

Resources

About

Inhalation exposure of traffic police officers to polycyclic aromatic hydrocarbons (PAHs) during the winter in Beijing, China

Cited by 72 publications

References 20 publications

Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and &lt;i&gt;α&lt;/i&gt;-dicarbonyls in PM&lt;sub&gt;2.5&lt;/sub&gt; from Beijing, China

Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and &lt;i&gt;α&lt;/i&gt;-dicarbonyls in PM&lt;sub&gt;2.5&lt;/sub&gt; from Beijing, China

Exposure measurement, risk assessment and source identification for exposure of traffic assistants to particle-bound PAHs in Tianjin, China

Recent analytical methods for atmospheric polycyclic aromatic hydrocarbons and their derivatives

Contact Info

Product

Resources

About

Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and <i>α</i>-dicarbonyls in PM<sub>2.5</sub> from Beijing, China

Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and <i>α</i>-dicarbonyls in PM<sub>2.5</sub> from Beijing, China