Stockholm Convention organochlorine pesticides and polycyclic aromatic hydrocarbons in Hong Kong air

Choi, Maggie; Kang, Yuan; Peng, Xiao Ling; Ng, K. W.; Wong, Ming Hung

doi:10.1016/j.chemosphere.2009.08.039

Cited by 24 publications

(8 citation statements)

References 15 publications

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“…These results clearly indicate that the concentrations of PAHs in the particulate phase, gaseous phase, and total (particulate+gaseous phases) were higher in the winter and lower in the summer season. This finding is consistent with those of previous investigators who found that the highest concentrations of PAH compounds were in winter season (Terzi and Samara 2004;Hassan 2006;Cincinelli et al 2007;Fon et al 2007;Sharma et al 2007;Esen et al 2008;Liu et al 2008;Vardar et al 2008;Li et al 2009;Choi et al 2009;Kennedy et al 2010). The gaseous and particulate PAHs concentrations, winter/summer (W/S), G/P concentration ratios in the atmosphere depend on several factors, such as meteorological conditions, photochemical degradation, and radical reactions.…”

Section: Seasonal Variations Of Pahs Concentrations In the Particulatsupporting

confidence: 93%

Gas–particle concentration, distribution, and health risk assessment of polycyclic aromatic hydrocarbons at a traffic area of Giza, Egypt

Hassan

Khoder

2011

Environ Monit Assess

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Atmospheric particulate and gaseous polycyclic aromatic hydrocarbons (PAHs) samples were collected from an urban area in Dokki (Giza) during the summer of 2007 and the winter of 2007-2008. The average concentrations of PAHs were 1,429.74 ng/m(3) in the particulate phase, 2,912.56 ng/m(3) in the gaseous phase, and 4,342.30 ng/m(3) in the particulate + gaseous phases during the period of study. Dokki has high level concentrations of PAH compounds compared with many polluted cities in the world. The concentrations of PAH compounds in the particulate and gaseous phases were higher in the winter and lower in the summer. Total concentrations of PAHs in the particulate phase and gaseous phase were 22.58% and 77.42% in summer and 36.97% and 63.03% in winter of the total (particulate + gaseous) concentrations of PAHs, respectively. The gaseous/particulate ratios of PAHs concentration were 3.43 in summer and 1.71 in winter. Significant negative correlation coefficients were found between the ambient temperature and concentrations of the total PAHs in the particulate and gaseous phases. The distribution of individual PAHs and different categories of PAHs based on aromatic ring number in the particulate and gaseous phases during the summer and winter were nearly similar, indicating similar emission sources of PAHs in both two seasons. Benzo(b)fluoranthene in the particulate phase and naphthalene in the gaseous phase were the most abundant compounds. Diagnostic concentration ratios of PAH compounds indicate that these compounds are emitted mainly from pyrogenic sources, mainly local vehicular exhaust emissions. Health risks associated with the inhalation of individual PAHs in particulate and gaseous phases were assessed on the basis of its benzo(a)pyrene equivalent concentration. Dibenzo(a,h)anthracene and benzo(a)pyrene in the particulate phase and benzo(a)pyrene and benzo(a)anthracene in the gaseous phase were the greatest contributors to the total health risks. The relative mean contributions of the total carcinogenic activity (concentrations) of all PAHs to the total concentrations of PAHs were 29.37% and 25.15% in the particulate phase and 0.76% and 0.92% in the gaseous phase during the summer and winter, respectively. These results suggest that PAHs in the particulate phase in the ambient air of Dokki may pose a potential health risk.

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Section: Seasonal Variations Of Pahs Concentrations In the Particulatsupporting

confidence: 93%

Gas–particle concentration, distribution, and health risk assessment of polycyclic aromatic hydrocarbons at a traffic area of Giza, Egypt

Hassan

Khoder

2011

Environ Monit Assess

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“…1), has long been a highly developed agricultural zone. Large amounts of previously applied DDT in the PRD have resulted in the occurrence of abundant DDTs in various environmental compartments (Guo et al, 2009), particularly in the atmosphere Choi et al, 2009;Liu et al, 2009). Yet, aerial deposition of DDTs in the PRD has not been adequately investigated and only a few reports are available in the literature.…”

Section: Introductionmentioning

confidence: 99%

Occurrence, phase distribution and depositional intensity of dichlorodiphenyltrichloroethane (DDT) and its metabolites in air and precipitation of the Pearl River Delta, China

Yue

Zhang

et al. 2011

Chemosphere

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“…Meanwhile, mean concentrations of DDTs in urban and suburban areas were much higher than those obtained in rural areas of Dongguan and Shunde ( Fig. 1 and Table 1) (Yue et al, 2011); however, particularly low concentrations were observed at Tsuen Wan Station, an urban residential site in Hong Kong (Choi et al, 2009). A year-long monitoring campaign from December 2003 to December 2004 in Guangzhou and Hong Kong indicated that the urban area of Guangzhou contained higher levels of DDTs than its suburban area, whereas the urban area of Hong Kong showed significantly lower concentrations than its suburban area.…”

Section: Airmentioning

confidence: 94%

A review of environmental and human exposure to persistent organic pollutants in the Pearl River Delta, South China

Zhang

Wei

Zeng

2013

Science of The Total Environment

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Stockholm Convention organochlorine pesticides and polycyclic aromatic hydrocarbons in Hong Kong air

Cited by 24 publications

References 15 publications

Gas–particle concentration, distribution, and health risk assessment of polycyclic aromatic hydrocarbons at a traffic area of Giza, Egypt

Gas–particle concentration, distribution, and health risk assessment of polycyclic aromatic hydrocarbons at a traffic area of Giza, Egypt

Occurrence, phase distribution and depositional intensity of dichlorodiphenyltrichloroethane (DDT) and its metabolites in air and precipitation of the Pearl River Delta, China

A review of environmental and human exposure to persistent organic pollutants in the Pearl River Delta, South China

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