福州市道路交通密度对城市土壤重金属含量影响研究

Impact of Road Traffic Density on Heavy Metal Concentrations of Urban Soil in Fuzhou

以福州市区土壤为研究对象,分析了福州市交通干道两侧表层土壤中Pb,Zn,Sr等10种重金属元素的含量,发现城市土壤不同程度受到重金属污染,Pb,Cu,Zn,Cr,Mn含量在各采样点均高于福建省土壤元素背景值.通过对福州市各路段机动车交通密度与土壤重金属含量进行相关分析,发现道路两侧表层土壤中Pb、Zn、Sr含量与机动车交通密度呈显著正相关,Cr含量与机动车交通密度也表现出一定相关性.

The urban surface soil samples of both sides of traffic roads in Fuzhou were collected for studying the content of Pb,Zn,Sr and other 10 kinds of heavy metals in soils. It is found that the urban surface soil subjects to different levels of heavy metal pollution. The contents of Pb,Cu,Zn,Cr and Mn at all sampling points are higher than those of the background soil in Fujian Province. The correlation of the heavy metal concentrations in soil was analyzed with the motor vehicle traffic density of traffic roads in Fuzhou. The results showed that there is a significant positive correlation between the content of Pb,Zn and Sr in urban surface soil of both sides of traffic roads and the motor vehicle traffic density. Some correlations were also showed between the content of Cr and the motor vehicle traffic density.