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题名: An index for estimating the potential metal pollution contribution to atmospheric particulate matter from road dust in Beijing
作者: Zhao, Hongtao; Shao, Yaping; Yin, Chengqing; Jiang, Yan; Li, Xuyong
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
出版日期: 2016-04-15
卷号: 550, 页码:167-175
关键词: Road dust particle ; Risk assessment methods ; Metal pollution ; Urban-rural gradient ; Atmospheric particulate pollution
DOI: 10.1016/j.scitotenv.2016.01.110
部门归属: 城市与区域生态国家重点实验室
英文摘要: The resuspension of road dust from street surfaces could be a big contributor to atmospheric particulate pollution in the rapid urbanization context in the world. However, to date what its potential contribution to the spatial pattern is little known. Here we developed an innovative index model called the road dust index (Rl(<105) mu m) and it combines source and transport factors for road dust particles < 105 mu m in diameter. It could quantify and differentiate the impact of the spatial distribution of the potential risks posed by metals associated with road dust on atmospheric suspended particles. The factors were ranked and weighted based on road dust characteristics (the amounts, grain sizes, and mobilities of the road dust, and the concentrations and toxicities of metals in the road dust). We then applied the Rl(<105) mu m the Beijing region to assess the spatial distribution of the potential risks posed by metals associated with road dust on atmospheric suspended particles. The results demonstrated that the road dust in urban areas has higher potential risk of metal to atmospheric particles than that in rural areas. The Rl(<105) mu m method offers a new and useful tool for assessing the potential risks posed by metals associated with road dust on atmospheric suspended particles and for controlling atmospheric particulate pollution caused by road dust emissions. (C) 2016 Elsevier B.V. All rights reserved.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35524
Appears in Collections:城市与区域生态国家重点实验室_期刊论文

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