Size distribution and di use pollution impacts of PAHs in street dust in urban
streams in the Yangtze River Delta |
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Authors: | ZHAO Hongtao YIN Chengqing CHEN Meixue WANG Weidong Je eries Chris and SHAN Baoqing |
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Institution: | State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,
Beijing 10085, China. E-mail: htzhao@163.com,State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,
Beijing 10085, China.,State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,
Beijing 10085, China.,State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,
Beijing 10085, China.,Urban Water Technology Centre, University of Abertay Dundee, Bell Street, Dundee, Scotland DD1 1HG, UK and State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences,
Beijing 10085, China. |
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Abstract: | Particles of dust washed o streets by stormwater are an important pathway of polyaromatic hydrocarbons (PAHs) into urban streams.
This article presented a comprehensive assessment of the size distribution of PAHs in street dust particles, the potential risks of the
particles in urban streams, and the sources and sinks of PAHs in the stream network. This assessment was based on measurements of
16 PAHs from the USEPA priority list in street dust particles and river sediments in Xincheng, China. The content of total PAHs ranged
from 1629 to 8986 g/kg in street dust particles, where smaller particles have a higher concentrations. Approximately 55% of the total
PAHs were associated with particles less than 250 m which accounted for 40% of the total mass of street dust. The PAH quantities
increased from 2.41 to 46.86 g/m2 in the sequence of new residential, rising through main roads, old town residential, commercial and
industrial areas. The sediments in stream reaches in town were found to be sinks for street dust particle PAHs. The research findings
suggested that particle size, land use and the hydrological conditions in the stream network were the factors which most influenced the
total loads of PAH in the receiving water bodies. |
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Keywords: | PAHs street dust particle size distribution land use pollutant load |
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