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Seasonal and spatial distributions of chlorinated PAHs in road dust from downtown Shanghai
Received date: 2016-01-15
Online published: 2016-04-30
Concentrations of twenty chlorinated polycyclic aromatic hydrocarbons (ClPAHs) in road dust from downtown Shanghai were analyzed using gas chromatographymass spectrometry (GC/MS). Eleven of twenty ClPAH congeners were found in road dust samples with more than a detection rate of 50%, indicating that ClPAHs were ubiquitous in road dust in downtown Shanghai. Seasonal variability of ClPAHs concentrations were observed, with higher concentrations in winter than in summer. The highest concentration of total ClPAHs was 24.9 ng/(g dw) (dw means dry weight) in winter. Concentrations of
ClPAHs varied greatly in different functional areas, In particular, the highest concentration was found in transportation hub regions (21.2 ng/(g dw) in winter and 10.7 ng/(g dw) in summer) followed by construction and commercial areas, while the lowest concentration was found in green areas. The compositional analysis showed that 6-ClBaP and 7-ClBaA were the two most important components in the road dust samples. The toxic equivalent
quantity (TEQ) ranges of ClPAHs were 0.01~4.81 ng-TEQ/(g dw) in winter and 0.01~1.78 ng-TEQ/(g dw) in summer, and the toxic equivalent of 7-ClBaA contributed the most.
WU Minghong1, WANG Yujie1, LIU Wenlong1, TANG Liang1, KANNAN Kurunthachalam2, OHURA Takeshi3, MA Jing1 . Seasonal and spatial distributions of chlorinated PAHs in road dust from downtown Shanghai[J]. Journal of Shanghai University, 2016 , 22(2) : 131 -140 . DOI: 10.3969/j.issn.1007-2861.2016.01.001
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