典型道路路边空气颗粒物及无机元素特征分析
发布时间：2019-07-28 15:03
【摘要】：于2015年春、夏季,在天津市选取4条不同等级道路进行路边空气颗粒物(PM_(2.5)和PM_(10))采集,并分析其中16种无机元素.结果表明,春季PM_(2.5)和PM_(10)的平均浓度显著高于夏季.路边环境中PM_(2.5)/PM_(10)低于非路边环境中空气颗粒物比值,且次干道和快速路分别在PM_(2.5)和PM_(10)中污染最严重.元素浓度分析显示,PM_(2.5)和PM_(10)中Si、Al、Ca等地壳元素浓度最高,次干道和快速路受人为元素影响较大,外环路所受影响较小;富集因子(PM_(2.5)和PM_(10))分析结果显示,Pb、Zn、Cu、Sb、Sn和Cd的EF10,是路边环境中富集程度较高的元素.通过Kruskal-Wallis H检验,PM_(2.5)中各元素富集因子在4条道路上存在显著性差异,次干道受机动车污染较严重.PM_(2.5)和PM_(10)中因子分析结果有一定差异,PM_(2.5)分析结果显示采样期间该区域主要污染源有开放源(土壤尘、扬尘、道路尘及建筑尘)、机动车排放源(尾气和非尾气源)、燃烧源和工业源,其中机动车排放源在人为源污染中占比最高.
[Abstract]:In spring and summer of 2015, four different grades of roads were selected in Tianjin to collect roadside air particles (PM_ (2.5) and PM_ (10), and 16 inorganic elements were analyzed. The results showed that the average concentrations of PM_ (2.5) and PM_ (10) in spring were significantly higher than those in summer. The ratio of PM_ (2.5) / PM_ (10) in roadside environment was lower than that in non-roadside environment, and the pollution of subtrunk road and expressway was the most serious in PM_ (2.5) and PM_ (10), respectively. The results of elemental concentration analysis showed that the concentration of Si,Al,Ca and other crust elements in PM_ (2.5) and PM_ (10) was the highest, the secondary trunk road and expressway were greatly affected by artificial elements, but the outer loop was less affected. The results of enrichment factor (PM_) and PM_ (10) analysis showed that the EF10, of Pb,Zn,Cu,Sb,Sn and Cd was the element with high enrichment in roadside environment. Through Kruskal-Wallis H test, there were significant differences in the enrichment factors of each element in PM_ (2.5) on four roads, and the secondary main roads were seriously polluted by motor vehicles. The results of factor analysis in PM_ (2.5) and PM_ (10) were different. The results of PM_ (2.5) analysis showed that there were open sources (soil dust, road dust and building dust) in this area during the sampling period. Motor vehicle emission sources (exhaust and non-tail gas sources), combustion sources and industrial sources, among which motor vehicle emission sources account for the highest proportion of man-made sources of pollution.
【作者单位】： 南开大学环境科学与工程学院城市交通污染防治研究中心;
【基金】：国家科技支撑计划项目(2014BAC16B03) 科技部科技基础性工作专项(2013FY112700-02)
【分类号】：X513
[Abstract]:In spring and summer of 2015, four different grades of roads were selected in Tianjin to collect roadside air particles (PM_ (2.5) and PM_ (10), and 16 inorganic elements were analyzed. The results showed that the average concentrations of PM_ (2.5) and PM_ (10) in spring were significantly higher than those in summer. The ratio of PM_ (2.5) / PM_ (10) in roadside environment was lower than that in non-roadside environment, and the pollution of subtrunk road and expressway was the most serious in PM_ (2.5) and PM_ (10), respectively. The results of elemental concentration analysis showed that the concentration of Si,Al,Ca and other crust elements in PM_ (2.5) and PM_ (10) was the highest, the secondary trunk road and expressway were greatly affected by artificial elements, but the outer loop was less affected. The results of enrichment factor (PM_) and PM_ (10) analysis showed that the EF10, of Pb,Zn,Cu,Sb,Sn and Cd was the element with high enrichment in roadside environment. Through Kruskal-Wallis H test, there were significant differences in the enrichment factors of each element in PM_ (2.5) on four roads, and the secondary main roads were seriously polluted by motor vehicles. The results of factor analysis in PM_ (2.5) and PM_ (10) were different. The results of PM_ (2.5) analysis showed that there were open sources (soil dust, road dust and building dust) in this area during the sampling period. Motor vehicle emission sources (exhaust and non-tail gas sources), combustion sources and industrial sources, among which motor vehicle emission sources account for the highest proportion of man-made sources of pollution.
【作者单位】： 南开大学环境科学与工程学院城市交通污染防治研究中心;
【基金】：国家科技支撑计划项目(2014BAC16B03) 科技部科技基础性工作专项(2013FY112700-02)
【分类号】：X513
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