吕梁市扬尘重金属含量及环境风险分析

Analysis of Content and Environmental Risk of Heavy Metals

通过采集吕梁市采暖期和非采暖期不同功能区的扬尘样品并测定重金属铜、锌、镍、铅、镉的含量,评价其污染程度。结果表明:吕梁市扬尘中各重金属浓度采暖期>非采暖期,Pb、Cd的浓度高于山西土壤元素背景值,采暖期分别超标2.29、29.15倍,非采暖期分别超标1.66、26.08倍。地积累污染指数法结果表明,吕梁市扬尘中重金属元素Cd属于严重污染,Pb属于轻度污染,Cu、Zn、Ni无实际污染。潜在生态风险指数法结果表明:吕梁市扬尘中重金属元素达到了严重污染水平和严重潜在生态危害。

Collecting the samples of re-suspended dust from different functional areas of Luliang city during the non-heating period and heating period.Re-suspended dust samples were obtained and analyzed for Ni,Cu,Pb,Zn and Cd by atomic absorption spectrometry.The concentrations of Cd,Pb exceeded the corresponding background values,the mean contents of Pb and Cd were 2.29 and 29.15 times in the heating period respectively/which were 1.66 and 26.08 times in the non-heating period respectively,as high as the soil background values of Shanxi.The assessment results of Geoaccumulation Pollution Index shown that the pollution level for Pb and Cd were very higher than Cu,Zn and Ni.The Potential Ecologically Risk assessment results shown that the level of heavy metal pollution and ecological harm were above heavy.