中文摘要：

为初步探讨芜湖市区地表灰尘重金属空间分布特征及主要来源，于2008年4月采集了芜湖市高新技术开发区、中心城区、经济技术开发区地表灰尘样品，用电感耦合等离子体发射光谱仪（ICP—OES）测定了9种重金属质量比。结果表明，Zn、Cd、Pb、Co、Ni、Mn、Cr、V和cu的质量比分别为313．53mg／kg、1．95mg／kg、138．61mg／kg、8．19mg／kg、21．38mg／kg、589．87mg／kg、110．31mg／kg、55．19mg／kg和135．42mg／kg。主要污染元素依次为cd、Ph、cu、zn，其质量比超出背景值4倍以上。霞金属总体上由南向北呈逐渐增加的趋势。Co、Cu、Cr和M具有相似的分布规律，最高值均出现在经济技术开发隧；V和Mn主要富集在研究区东南角和东北角，往西逐渐下降；Zn和Ph的最高值出现在中心城区和研究区的最东北角；Cd则出现多个高污染中心，且整个研究区质量比较高，污染较为严重。空间分布及统计分析表明，芜湖市区地表灰尘中重金属主要有两个来源：1）工业排放，特征元素为co、M、cu、V、Mn；2）城市交通活动，特征元素为Zn、cd、Cr、Pb。

英文摘要：

The paper is aimed to study the sources of heavy metals and their spatial distribution on the surface dust in Wuhu urban ar- eas. For our research purpose, we have collected surface dust samples from three districts of Wuhu city （High-tech Development Zone, the city＇s down-town area, and the Economic and Technologieal Development Zone） in April, 2008. Our analysis work has been done in hoping to find the sources of heavy metals, such as Zn, Cd, Pb, Co, Ni, Mn, Cr, V and Cu by using a method of ICP-OES. The results of our analysis can be shown as follows ： the content of Zn, Cd, Pb, Co, Ni, Mn, Cr, V and Cu are 313.53 mg/kg, 1.95 mg/kg, 138.61 mg/kg, 8.19 mg/kg, 21.38 mg/kg, 589.87 mg/kg, 110.31 mg/kg, 55.19 mg/kg and 135.42 mg/kg, respectively. The major metal pollutants are： Cd, Pb, Cu and Zn, Cd, which consti- tute four times higher pollutants than the background values. Contents of heavy metals were found highly different in the above said three districts. Whereas the city＇s down-town area is heavy with Zn and Pb contents, High-tech Development Zone is heavy with Mn content. Except for Zn, Pb, Mn, the Economic and Technological Develop- ment Zone are heavy with all other metal contents. Such a situation can perhaps attribute to the highly concentrated industries of the sort of nature. Our analysis with the spatial distribution of heavy metals early indicate a growing trend from the city ＇ s south to north, with Co, Cu, Cr and Ni keeping the similar distribution. The maximum values were found existing in Economic and Technological Develop- ment Zones, perhaps somewhat related to industrial emissions and ur- ban traffic gas-exhaust leftovers for V and Mn were major pollutants in the southeast and northeast areas of the city. The highest contents of Zn and Pb existing in the downtown area and the southeast and north- east areas while several high-pollution centers of Cd were found high in all the areas under study. Thus, on the whole, it can be conclud- ed that the surface dust heavy