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Gu Y.-G.,CAS South China Sea Fisheries Research Institute | Gu Y.-G.,Key Laboratory of Fishery Ecology and Environment of Guangdong Province | Gu Y.-G.,Key Laboratory of South China Sea Fishery Resources Exploitation | Gao Y.-P.,CAS Guangzhou Institute of Geochemistry | And 3 more authors.
Applied Geochemistry | Year: 2016

The total concentrations and oral bioaccessibility of heavy metals in surface-exposed lawn soils from 28 urban parks in Guangzhou were investigated, and the health risks posed to humans were evaluated. The descending order of total heavy metal concentrations was Fe > Mn > Pb > Zn > Cu > Cr > Ni > Cd, but Cd showed the highest percentage bioaccessibility (75.96%). Principal component analysis showed that Grouped Cd, Pb, Cr, Ni, Cu and Zn, and grouped Cr and Mn could be controlled two different types of human sources. Whereas, Ni and Fe were controlled by both anthropogenic and natural sources. The carcinogenic risk probabilities for Pb and Cr to children and adults were under the acceptable level (<1 × 10-4). Hazard Quotient value for each metal and Hazard Index values for all metals studied indicated no significant risk of non-carcinogenic effects to children and adults in Guangzhou urban park soils. © 2016 Elsevier Ltd. Source


Sun R.-X.,CAS South China Sea Fisheries Research Institute | Sun R.-X.,Key Laboratory of Fishery Ecology and Environment of Guangdong Province | Sun R.-X.,Key Laboratory of Ministry of Agriculture for South China Sea Fishery Resources Exploitation | Sun R.-X.,CAS Guangzhou Institute of Geochemistry | And 15 more authors.
Marine Pollution Bulletin | Year: 2016

Polycyclic aromatic hydrocarbons (PAHs) were investigated in the marine ecosystem of the Daya Bay, South China. The PAH concentrations ranged from 340 to 710 ng/g dry weight in the sediments and from 110 to 520 ng/g wet weight in marine organisms, respectively. The dominant compounds were three- and four-ring PAHs in the sediments (53%-89%) and two- and three-ring PAHs in the marine species (67%-94%), respectively. PAHs mainly originated from both pyrolytic and petrogenic sources. Comparison with the effects-based sediment quality guideline values suggested that the ecological risk caused by the total PAHs was relatively low (less than 25% incidence of adverse effects) in the sedimentary environment. The median cancer risk level via seafood consumption (1.6 × 10-5 for urban residents and 1.2 × 10-5 for rural residents, respectively) was slightly higher than the maximum admissible level (10-5) set by US EPA, but lower than the priority risk level (10-4). © 2016 Elsevier Ltd. Source


Sun R.-X.,CAS South China Sea Fisheries Research Institute | Sun R.-X.,Key Laboratory of Fishery Ecology and Environment of Guangdong Province | Sun R.-X.,Key Laboratory of Ministry of Agriculture for South China Sea Fishery Resources Exploitation and Utilization | Sun R.-X.,CAS Guangzhou Institute of Geochemistry | And 15 more authors.
Marine Pollution Bulletin | Year: 2015

Polycyclic aromatic hydrocarbons (PAHs) were investigated in the marine ecosystem of the Daya Bay, South China. The PAH concentrations ranged from 340 to 710ng/g dry weight in the sediments and from 110 to 520ng/g wet weight in marine organisms, respectively. The dominant compounds were three- and four-ring PAHs in the sediments (53%-89%) and two- and three-ring PAHs in the marine species (67%-94%), respectively. PAHs mainly originated from both pyrolytic and petrogenic sources. Comparison with the effects-based sediment quality guideline values suggested that the ecological risk caused by the total PAHs was relatively low (less than 25% incidence of adverse effects) in the sedimentary environment. The median cancer risk level via seafood consumption (1.6×10-5 for urban residents and 1.2×10-5 for rural residents, respectively) was slightly higher than the maximum admissible level (10-5) set by US EPA, but lower than the priority risk level (10-4). © 2016 Elsevier Ltd. Source

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