城市灰尘重金属含量对城市土壤重金属的影响--以金华市为例

为系统了解城市重金属污染特性，采集了金华市不同功能区的城市灰尘与城市土壤样品，获得重金属含量，并对数据进行了统计分析。结果表明：（1）灰尘中重金属含量均高于土壤，含量最高的 Mn，平均质量分数为770．62 mg/kg，其次为 Zn，为696．72 mg/kg。土壤中 Mn 元素质量分数最高，为537．60 mg/kg。（2）灰尘、土壤中重金属均为中等变异，且土壤变异程度高于灰尘，说明土壤中的重金属受外界扰动更大。（3）城市灰尘和土壤中 Zn 元素表现为显著正相关，说明其对土壤有影响， Cu、 Pb 和 Mn 表现为正相关， Nb 基本不相关， Cr 为负相关，但相关性均不显著。

The Influence of the Heavy Metal Content in Urban Dust on Heavy Metal in Urban Soil ---Taking Jinhua City as an Example

In order to systematically understand the pollution characteristics of heavy metal in city, urban dust and urban soil samples from different functional zones of Jinhua City were collected.We obtained the heavy metal content and carried on the statistics analysis.The results show that： （1） The heavy metal content of dust is significantly higher than that in the soil, the highest content is Mn, the average content of it is 770.62 mg/kg, then Zn, 696.72 mg/kg.The content of Mn in soil is the highest, reached 537.60 mg/kg.（2） Both heavy metals in the dust and in the soil are medium variation.And the variability of soil is higher than that of dust, which means that the external disturbance of soil heavy metal is greater.（3） The Zn in the urban dust and soil showed significant positive correlation, shows its influence on the soil.Cu, Pb and Mn showed positive correlation, and Nb is basically not related, Cr is negative correlation, but the correlation was not significant.