中文摘要：

对乌鲁木齐市不同功能区大气降尘中的重金属采用ICP—AES（电感耦合等离子体原子发射光谱）进行分析测试。结果表明：夏季大气降尘中重金属的含量由高至低依次为：Cr〉Mn〉Zn〉As〉Pb〉Ni〉Cd。重金属在不同功能区的总体分布特征表现为商业区〉工业区〉居民区〉文化区〉郊区。利用地积类指数法，分析结果表明大气降尘中As、Cr为重污染，Zn、Ni、cd、Pb为中等污染。

英文摘要：

The heavy metals in air dustfall of different functional areas in Urumqi were analyzed and tested by CP - AES （ inductively coupled plasma-atomic emission spectrometry）. The results show that the content of heavy metals in atmospheric dustfall was in the order： Cr 〉 Mn 〉 Zn 〉 As 〉 Pb 〉 Ni 〉 Cd and the overall distribution characteristics of heavy metals in different functional areas were in the order： commercial 〉 district 〉 industrial area 〉 residential area 〉 cultural region 〉 suburb. Based on the geoaccumulation index, in the air dustfall As and Cr was in serious pollution, but Zn, Ni, Cd and Pb was in moderate pollution.