成都市东区大气总悬浮颗粒物(TSP)质量浓度及其重金属分布特征

Mass concentration and heavy metal distribution characteristics of total suspended particulates(TSP)in the eastern area of Chengdu city

大气总悬浮颗粒物(TSP)中的重金属污染物具有不可降解性,可经由干湿沉降转移到地表土壤和地表水体中,通过一定的生物化学作用,进入动植物体内,严重危害人体健康。研究了成都市东区TSP质量浓度,以及颗粒物重金属元素的浓度分布特征,并对该区重金属进行了污染评价。结果表明,2015年研究区大气TSP的年平均浓度为0.219 9mg/m3,略超过国家二级标准规定的年均浓度限值。研究区TSP平均质量浓度的变化为冬季>春季>秋季>夏季,呈现明显的季节变化。富集因子分析表明,TSP中重金属Pb、Zn、Cd、Cr、Ni、Cu富集程度不一,其中Cd、Cu、Zn和Pb元素人为来源明显。

Total suspended particulates(TSP)in heavy metals is not biodegradable,so it can be transferred to the settlement of the surface soil and surface water in the dry wet,through biochemical effect,and then it will be transferred to animals and plants,serious harm to human health.In this paper,the concentration of TSP and the concentration distribution of heavy metal elements in the east of Chengdu were studied.The results showed that the annual average concentration of atmospheric TSP in eastern Chengdu was 0.2199 mg/m3 in 2015,slightly exceeding the annual concentration limit stipulated by the national level two standard.The change of average mass concentration of TSP in the study area was in winter>spring>autumn>summer,showing obvious seasonal variation.Enrichment factor analysis showed that the concentrations of heavy metals Pb,Zn,Cd,Cr,Ni,Cu were different in TSP,and the Cd,Cu,Zn and Pb elements were obvious in human sources.