Distribution and sources of polycyclic aromatic hydrocarbons in sediments of the Mai Po Inner Deep Bay Ramsar Site in Hong Kong

TY - JOUR

T1 - Distribution and sources of polycyclic aromatic hydrocarbons in sediments of the Mai Po Inner Deep Bay Ramsar Site in Hong Kong

AU - Zhao, Zhen Ye

AU - Chu, Yan Ling

AU - Gu, Ji Dong

N1 - Funding Information: Acknowledgments The research results presented here were supported by ‘‘Shenzhen Double Hundred Project’’ (Z-YZ) and Environmental Toxicology Education Fund of the Laboratory (J-DG). We would like to thank Jessie Lai and other members contributing to the work related to Mai Po Ecological Monitoring 2001–2008 and the field working group of AFCD at Mai Po for logistic support on sampling transport and assistance. Any opinions, findings, conclusions or recommendations expressed in this publication do not reflect the view of the Government of Hong Kong Special Administrative Region.

PY - 2012/8

Y1 - 2012/8

N2 - The concentration of total polycyclic aromatic hydrocarbons (∑PAHs) and the 16 US EPA priority individual PAH compounds were analyzed in surface sediments from the Mai Po Inner Deep Bay, Ramsar Site of Hong Kong from December 2001 to Jun 2005, to investigate the spatial variability of anthropogenic pollutants. ∑PAHs concentrations ranged from 36.5 to 256.3 ng g-1 dry weight with an average of 148.9 ng g-1, comparable to other urbanized areas of the world, and there was little difference among different sampling times from December 2001 to June 2005. Based on comparison to the results from earlier study, it appears that a decrease of total PAHs concentration has occurred since 1992. Meanwhile, the concentrations of ∑PAHs were positive correlated with total organic carbon contents except sites F and G, suggesting the characteristics of the sediment influences the distribution and concentration of PAHs. There was relatively a good relationship among the individual PAHs and the compounds of fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo[a]pyrene and indeno[cd]pyrene yielded a good correlation (r2>0.5) with total PAHs. Principal component analysis and specific PAHs compound ratios (Phe/Ant vs. Flt/Pyr) indicate the pyrogenic origins, especially traffic exhausts, are the dominant sources of PAHs in the Mai Po Inner Deep Bay Nature Reserve.

AB - The concentration of total polycyclic aromatic hydrocarbons (∑PAHs) and the 16 US EPA priority individual PAH compounds were analyzed in surface sediments from the Mai Po Inner Deep Bay, Ramsar Site of Hong Kong from December 2001 to Jun 2005, to investigate the spatial variability of anthropogenic pollutants. ∑PAHs concentrations ranged from 36.5 to 256.3 ng g-1 dry weight with an average of 148.9 ng g-1, comparable to other urbanized areas of the world, and there was little difference among different sampling times from December 2001 to June 2005. Based on comparison to the results from earlier study, it appears that a decrease of total PAHs concentration has occurred since 1992. Meanwhile, the concentrations of ∑PAHs were positive correlated with total organic carbon contents except sites F and G, suggesting the characteristics of the sediment influences the distribution and concentration of PAHs. There was relatively a good relationship among the individual PAHs and the compounds of fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo[a]pyrene and indeno[cd]pyrene yielded a good correlation (r2>0.5) with total PAHs. Principal component analysis and specific PAHs compound ratios (Phe/Ant vs. Flt/Pyr) indicate the pyrogenic origins, especially traffic exhausts, are the dominant sources of PAHs in the Mai Po Inner Deep Bay Nature Reserve.

KW - Anthropogenic

KW - Mai Po Ramsar Site

KW - PAH

KW - Sediments

KW - Urbanization

UR - http://www.scopus.com/inward/record.url?scp=84864887200&partnerID=8YFLogxK

U2 - 10.1007/s10646-012-0948-6

DO - 10.1007/s10646-012-0948-6

M3 - 文章

C2 - 22695981

AN - SCOPUS:84864887200

SN - 0963-9292

VL - 21

SP - 1743

EP - 1752

JO - Ecotoxicology

JF - Ecotoxicology

IS - 6

ER -