For discussing and evaluating the possible contribution to atmospheric pollution in the process of utilizing mineral resources as well as which has an influence to the accumulation of heavy metals in the soil, the pollution characteristics and sources of Cd element in the dust fall were evaluated in the typical mining city Tongling. 17 dustfall samples in different function zones were collected and analyzed the Cd concentrations by GFAAS. The method of copper enrichment factors(EF) were used to distinguish the possible pollution source. The result shows that the average of Cd concentration in the dustfall is 16.44 μg/ g and the average of copper EF is 78. 8. Cd pollution in the dustfall is serious and the central areas of pollution are around the mining and smelting factories. The mining and smelting of Cd ores are the primary pollution sources for the Cd pollution in the dustfall in Tongling. The deposition flux of Cd from the dust fall to the soil is 1.84 mg/(m2 · a), which is obviously higher than its in Hefei, ma'anshan city,and so On.%为了评价有色金属矿山城市大气降尘中重金属元素的污染状况、来源及其对土壤重金属累积的影响,分析测试了铜陵市大气降尘样品中Cd元素的含量.分析结果表明,降尘样品中Cd元素的平均含量为16.44/μg/g,明显高于安徽省江淮流域多目标调查中铜陵土壤Cd元素的平均含量;降尘中Cd元素含量较高的样品出现在矿山和冶炼厂附近.用富集因子法定性地判断了各采样点Cd元素的来源,大气降尘中Cd元素的富集因子均值为78.8,表明铜陵市大气降尘中Cd元素污染严重,且矿石的开采和冶炼对大气降尘中Cd污染的贡献较大,是研究区大气污染中重金属的主要来源.大气降尘对土壤Cd的输入通量较大,达到1.84 mg/(m2·a),远高出合肥、马鞍山等城市.
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