Size distribution of polycyclic aromatic hydrocarbons in urban and suburban sites of Beijing, China

Attributing risk burden of PM2.5-bound polycyclic aromatic hydrocarbons to major emission sources: Case study in Guangzhou, south China

“…The average concentrations of total PAHs ( P PAHs) and 15 USEPA priority PAHs ( P 15 PAHs, excluding NaP due to its high volatility) were 13.04 (0.5e62.08) ng/m 3 and 9.72 (0.29e56.97) ng/m 3 , respectively. The PAH concentrations in this study were consistent with previously reported values by Li et al (2006) (23.7 ± 18.4 ng/m 3 ) and Gao et al (2012) (17.1 ng/m 3 ) in Guangzhou, lower than that measured in Beijing (116 ng/m 3 ) (Zhou et al, 2005), but higher than those measured in many other cities, such as Houston, USA (0.78 ng/m 3 ) (Fraser et al, 2002), Lumpur, Malaysia (2.79 ng/m 3 ) (Khan et al, 2015), Mount Taishan, China (6.88 ng/m 3 ) , Rio de Janeiro, Brazil (3.80 ± 2.88 ng/ m 3 ) (Oliveira et al, 2014). P PAHs and P 15 PAHs at rural JL (17.61 ± 3.19 ng/m 3 and 13.14 ± 2.35 ng/m 3 ) showed significantly higher levels (p < 0.05) than those at urban SZ (11.56 ± 2.04 ng/m 3 and 8.54 ± 1.46 ng/m 3 ) and YJ (9.26 ± 1.21 ng/m 3 and 7.04 ± 0.83 ng/m 3 ) but had no significant difference when compared to another rural site WQS (13.69 ± 2.86 ng/m 3 and 10.14 ± 2.13 ng/m 3 ) ( Table 1).…”

Atmospheric polycyclic aromatic hydrocarbons in rural and urban areas of northern China

“…As illustrated in Table 2, the average total PAH concentration at NAEO was similar to the background site Mountain (MT). Waliguan (the Global Climate Observing System of the World Meteorological Organization in tropical zone) (Cheng, 2006) and rural site in Italy (Perrone et al, 2012), and also higher than the high mountain regions in Europe (Fernandez et al, 2002), MT Taishan (Li et al, 2010), while lower than those found in other urban or suburban sites such as Guangzhou (Li et al, 2006), Shanghai (Chen et al, 2011), Beijing (Zhou et al, 2005), Hong Kong , Seoul in Korea (Park et al, 2002). Eastern China is a significant source of atmospheric PAHs (Zhang et al, 2011).…”

Persistent organic pollutants in tropical coastal and offshore environment: part A—atmospheric polycyclic aromatic hydrocarbons

“…3). These three dominant compounds are related to sources from diesel vehicle exhaust, road/soil dust, and oil combustion emissions (Harrison et al 1996;Huang et al 2012;Omar et al 2002;Zhou et al 2005). Given the characteristics of the sampling sites, in the present study, local vehicle and stationary source emissions (e.g., industrial activities) are suggested as dominant sources of PAHs.…”

“…A value of An/ (An ? Ph) larger than 0.1 indicates combustion sources, while those with a ratio \0.1 originate from petroleum sources (Yunker et al 2002;Zhou et al 2005). Figure 4a shows the ratios of An/(An ?…”