Passive air sampling for determining the levels of ambient PCDD/Fs and their seasonal and spatial variations and inhalation risk in Shanghai, China
作者： Yajun Tian , Zhiqiang Nie , Shulei Tian , Feng Liu , Jie He
DOI: 10.1007/S11356-015-4552-1
关键词:
摘要: The seasonal and spatial variations, compositional profiles, possible sources of polychlorinated dibenzo-p-dioxins dibenzofurans (PCDD/Fs) in ambient air samples Shanghai China were investigated by passive samplers, the potential inhalation risks posed these chemicals evaluated. following results obtained: (1) World Health Organization (WHO) toxic equivalency (TEQ) values for PCDD/Fs range 10.8–259 fg m−3 (mean 63.4 fg m−3) summer 24.1–154 fg m−3 83.4 fg m−3) winter. Atmospheric PCDD/F levels order: industrial areas > commercial residential areas > rural areas. (2) 2,3,4,7,8-PeCDF (24 %), 2,3,7,8-TeCDD (16 %), 1,2,3,7,8-PeCDD (13 %), 2,3,7,8-TeCDF (12 %) predominant contributors to TEQ PCDD/Fs. (3) There was a slight trend with higher winter than summer, which could be related variations dispersion air. (4) children’s daily intake at lower end tolerable recommended WHO, indicates that risk local residents is relatively low.
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