A GIS technology based potential eco-risk assessment of metals in urban soils in Beijing, China

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	A GIS technology based potential eco-risk assessment of metals in urban soils in Beijing, China
	Bai Yanying
	2012
关键词	Risk assessment Cadmium Chromium Copper Ecology Geographic information systems Heavy metals Lead Metals Soils Zinc
英文摘要	Ecological risks of heavy metals in urban soils were evaluated using Beijing, China as an example. Cadmium, Cu, Zn, Pb, Cr and Ni contents of 233 surface soils sampled by 1 min latitude 1 min longitude grid were used to identify their spatial distribution patterns and potential emission sources. Throughout the city, longer the duration of urbanization greater was the accumulations of heavy metals especially, Cd, Cu, Pb, and Zn. The soil Zn mainly came from the wears of vehicular tires. Point source emissions of heavy metals were few and far in the downwind south-east quadrant of Beijing. The calculated risk indices showed potential median eco-risks in the ancient central city. No potential high eco-risk due to soil-borne heavy metals was found. The potential medium eco-risk areas in Beijing would expand from the initial 24 to 110 km 2 if soil pH were to reduce by 0.5 units in anticipation. 2011 Elsevier Ltd. All rights reserved.
出处	Environmental Pollution
卷	161 页:235-242
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/27687]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Bai Yanying. A GIS technology based potential eco-risk assessment of metals in urban soils in Beijing, China. 2012.