摘要：采用潜在生态危害指数法和富集因子法,对衡阳市冬春季大气颗粒物中重金属污染进行评价。结果表明:重金属元素的潜在生态危害大小为Cd>Cr>Pb>Cu>Ni,春季>冬季,细颗粒物PM_2.5>总悬浮颗粒物TSP,Pb、Cd、Cr的潜在生态危害程度均属于极强;重金属的富集程度为:Cd>Cr>Pb>Cu>Ni,PM_2.5>TSP;Pb、Cu、Cd冬季富集程度大于春季,Cr和Ni冬季富集程度小于春季;TSP和PM_2.5中重金属的富集系数EF值均大于1,说明重金属的相对富集受到人为活动的影响。

关键词：生态危害指数；富集系数；颗粒物；重金属

Abstract：Assessment of heavy metal pollution in atmospheric particulate matter in Hengyang in winter and spring was conducted respectively by potential ecological risk index and enrichment factor.The results show that an order of potential ecological risk index of heavy metals in atmospheric particulate matter is Cd>Cr> Pb> Cu> Ni, spring> winter, fine particles PM₂.₅>total suspended particles TSP, in which the potential ecological risk degree of Pb,Cd and Cr reached terribly strong. The enrichment degree of heavy metal elements is Cd> Cr> Pb>Cu> Ni, PM₂.₅>TSP. Winter is greater than spring in the enrichment degree of Pb,Cu and Cd. Winter is less than spring in the concentration degree of Cr and Ni. The EF of heavy metals is more than one. It indicates that the relative enrichment of the heavy metals in TSP and PM₂.₅are influenced by human activities.

Keywords: potential ecological risk index；enrichment factor；particulate matter；heavy metal