Distributions and Concentrations of PAHs in Hong Kong Soils

Zhang, H. B.; Luo, Yongming; Wong, Ming Hung; Zhao, Qiong; Zhang, G. L.

doi:10.1016/j.envpol.2005.08.031

Cited by 279 publications

(127 citation statements)

References 36 publications

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“…The most industrialized district, Tanggu, had the highest total PAH concentrations (1,150 ng g −1 ), followed by Hangu (657.67 ng g −1 ) and Dagang (573.34 ng g −1 ), which suggests that Tanggu district is more seriously contaminated by PAHs, compared with Hangu and Dagang districts. This finding agrees with reports that rural soils usually have lower PAH concentrations than urban or industrial ones (Trapido 1999;Wilcke 2000;Zhang et al 2006;Cai et al 2007).…”

Section: Spatial Distribution Of Pahssupporting

confidence: 93%

Identification of sources of elevated concentrations of polycyclic aromatic hydrocarbons in an industrial area in Tianjin, China

Jiao

Lü

et al. 2009

Environ Monit Assess

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The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) were determined by gas chromatography equipped with a mass spectrometry detector in 105 topsoil samples from an industrial area around Bohai Bay, Tianjin in the North of China. Results demonstrated that concentrations of PAHs in 104 soil samples from this area ranged from 68.7 to 5,590 ng g −1 dry weight with a mean of 16PAHs 814 ± 813 ng g −1 , which suggests that there exists mid to high levels of PAH contamination. The concentration of 16PAHs in one soil sample from Tianjin Port was exceptionally high (48,700 ng g −1 ). Ninetythree of the 105 soil samples were considered to be contaminated with PAHs (>200 ng g −1 ), and 25 were heavily polluted (>1,000 ng g −1 ). The sites with high PAHs concentration are mainly distrib- uted around chemical industry parks and near highways. Two low molecular weight PAHs, naphthalene and phenanthrene, were the dominant components in the soil samples, which accounted for 22.1% and 10.7% of the 16PAHs concentration, respectively. According to the observed molecular indices, house heating in winter, straw stalk combustion in open areas after harvest, and petroleum input were common sources of PAHs in this area, while factory discharge and vehicle exhaust were the major sources around chemical industrial parks and near highways. Biological processes were probably another main source of low molecular weight PAHs.

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Section: Spatial Distribution Of Pahssupporting

confidence: 93%

Identification of sources of elevated concentrations of polycyclic aromatic hydrocarbons in an industrial area in Tianjin, China

Jiao

Lü

et al. 2009

Environ Monit Assess

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“…centrations reported by Zhang et al [39] for a rural area in Hong Kong were lower. Recently measured 14 PAH soil concentrations at Aliaga industrial region were generally significantly higher than those measured in the present study [5].…”

Section: Pah Concentrations In Soil and Air-soil Exchangementioning

confidence: 54%

“…14 PAH concentrations in soil reported by Zhang et al [39] for the urban area in Hong Kong, by Nadal et al [18] for the industrial and unpolluted areas in Spain, by Motelay-Massei et al [40] for industrial, urban and remote areas in France, and by Cousins and Jones [15] for a rural area in the UK were higher than the values measured in this study while the con- Table 3 Soil concentrations (ng g −1 dry wt) and air/soil net gas exchange fluxes (ng m −2 day −1 ) of PAHs at suburban site (average ± SD). centrations reported by Zhang et al [39] for a rural area in Hong Kong were lower.…”

Section: Pah Concentrations In Soil and Air-soil Exchangementioning

confidence: 94%

Particle-phase dry deposition and air–soil gas exchange of polycyclic aromatic hydrocarbons (PAHs) in Izmir, Turkey

Demircioglu

Sofuoğlu

Odabaşı

2011

Journal of Hazardous Materials

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a b s t r a c tAmbient air and dry deposition samples were collected at suburban and urban sites in Izmir, Turkey. Atmospheric total (particle + gas) 14 PAHs concentrations were 36 ± 39 and 144 ± 163 ng m −3 for suburban and urban sites, respectively. Phenanthrene was the most abundant compound at all sites, and all samples were dominated by low molecular weight PAHs. Average particulate 14 PAH dry deposition fluxes were 8160 ± 5024 and 4286 ± 2782 ng m −2 day −1 and overall average particulate dry deposition velocities were 1.5 ± 2.4 and 1.0 ± 2.3 cm s −1 for suburban and urban sites, respectively. Soil samples were collected at suburban site. Average soil concentration for 14 PAH was 55.9 ± 14.4 ng g −1 dry weight. Calculated gas-phase air-soil exchange fluxes indicated that fluorene, phenanthrene, anthracene, and carbazole were deposited to soil in winter while they were volatilized in summer. Other compounds (fluoranthene-benzo[g,h,i]perylene) were deposited to soil in both periods. Annual average fluxes of PAHs representing soil to air (i.e., gas volatilization) and air to soil transfer (i.e., gas absorption, dry deposition, and wet deposition) processes were also compared. All processes were comparable for 14 PAHs however their input was dominated by gas absorption. Gas absorption dominated for lower molecular weight PAHs, however dry deposition dominated for higher molecular weight PAHs. The results have suggested that for fluorene, soil and air may be approaching a steady state condition. For the remaining compounds, there was a net accumulation into the soil.

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“…The greatest total PAH concentrations of 20,000 ng/g dw was found at location 6, and the highest dioxin-like PAHs concentration of 12,000 ng/g dw (62% to total PAHs concentration) was also observed at this site, indicating the presence of localized source. With the exception of site 6, the mean level of total PAHs (570 ng/g dw) was consistent with those observed in a rice field (120-820 ng/g dw), a burnt plastic dump site (430 ng/g dw) and a printer roller dump site (590 ng/g dw) in Guiyu (Yu et al, 2006;Wong et al, 2007b), but was higher than those obtained in other cities in southeast China, such as Hangzhou (300 ng/g dw), Guangzhou (380 ng/g dw), and Hong Kong (55 ng/g dw) (Chen et al, 2004(Chen et al, , 2005Zhang et al, 2006). For comparison, the total PAH concentrations at location 6 was greater than those found at the openburning site in Guiyu by an order of magnitude, which confirmed a nearby significant input of PAHs (Yu et al, 2006;Wong et al, 2007b).…”

Section: Pahsmentioning

confidence: 61%

Dioxin-like compounds in agricultural soils near e-waste recycling sites from Taizhou area, China: Chemical and bioanalytical characterization

Shen

Chen

Huang

et al. 2009

Environment International

162

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Distributions and Concentrations of PAHs in Hong Kong Soils

Cited by 279 publications

References 36 publications

Identification of sources of elevated concentrations of polycyclic aromatic hydrocarbons in an industrial area in Tianjin, China

Identification of sources of elevated concentrations of polycyclic aromatic hydrocarbons in an industrial area in Tianjin, China

Particle-phase dry deposition and air–soil gas exchange of polycyclic aromatic hydrocarbons (PAHs) in Izmir, Turkey

Dioxin-like compounds in agricultural soils near e-waste recycling sites from Taizhou area, China: Chemical and bioanalytical characterization

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