合肥市城市土壤重金属元素含量及空间分布特征

Heavy Metal Contents and Their Spatial Distribution in Urban Soil of Hefei City

研究了合肥市城市土壤中重金属的含量、空间分布特征及来源。结果表明,合肥市城市土壤中,Ni和As2种元素污染不明显,但受到Cu、Zn、Pb、Sr、Cd、Hg6种元素不同程度的污染,其中Hg污染最严重。Ni和As2种元素的分布主要受自然因素影响,Cu、Zn、Pb、Sr、Cd、Hg6种元素主要来源于人为输入。Zn,Cd,Pb3种元素的空间分布规律比较相似,表现为在东部工业区和老城区内明显出现富集。Cu和Hg2种元素在合肥市城市土壤中含量的分布规律比较相似,峰值出现在东部工业区、老城区、北部和南部交通干线交汇区。Zn、Cd、Pb、Cu、Hg5种元素可能主要来源于工业活动和交通污染。Sr元素峰值出现在老城区和工业区中间,主要交通干线沿线和交汇地区含量也较高,Sr元素可能主要来源于交通污染。

The contents and spatial distribution of heavy metals in urban soils of Hefei city and their sources were studied.The results showed that the urban soils in Hefei were not evidently polluted by Ni and As,but contaminated by Cu、Zn、Pb、Sr、Cd and Hg to varying degrees and especially Hg to some extent.The distribution of Ni and As was mainly affected by natural factors and Cu、Zn、Pb、Sr、Cd and Hg were mainly originated from human inputs.The characteristics of spatial distribution of Zn,Cd and Pb were similar,which...