昆山市高新区PM_(2.5)元素特征分析及健康风险评价

Study on the Characteristic Analysis and Health Risk Assessment of PM_(2.5) in Kunshan High- tech Zone

对昆山市高新区大气PM_(2.5)颗粒物和元素污染浓度进行同步监测,以元素为污染物示踪因子进行污染源特征分析,并通过健康风险评价模型对该地区颗粒物重金属元素进行评价。实验结果表明,在监测期间该区域PM_(2.5)污染程度不大,平均质量浓度达57.90μg/m^3;通过主成分分析对PM_(2.5)中元素进行分析,发现其主要来源分为混凝土搅拌及道路扬尘污染,电子产品及机械制造污染和燃煤燃烧污染等3个组分,电子产品及机械制造引起的污染是昆山高新区PM_(2.5)的主要来源;健康风险评价结果显示,昆山市高新区颗粒物中单种重金属元素通过呼吸途径对暴露人群的年均超额危险度在5.46E7~5.68E12之间,低于人群可接受的危险度水平10E6。

Atmospheric PM2. 5 and elements element pollution concentration of in Kunshan high - tech zone were studied in this paper. Through the analysis of characteristics of pollution sources with elements as the pollutants tracing factors, this study utilized health risk assessment model to evaluate particulate heavy metals in this region. The results showed hardly pollution with the regional mass concentration of 57. 90 μg/m3 during monitoring period, and found the main sources were concrete mixing and road dust pollution, electronics and machinery manufacturing and coal burning pollution by the principal component analysis and correlation analysis on PM2.5. Among them, electronics and machinery manufacturing occupied the main sources of PM2.5 in Kunshan high - tech zone. The result of health risk show that the total non - carcinogenic hazard index was from 5.46E7 to 5.68E12 and below the people＇s acceptable risk level of 10E6.