邯郸市大气PM_(2.5)中元素特征及健康风险评价

CHARACTERISTIC OF ELEMENTS IN PM_(2.5) AND HEALTH RISK ASSESSMENT OF HEAVY METALS IN HANDAN

通过采集测定邯郸市2015年的PM_(2.5)环境样品,分析了邯郸市PM_(2.5)中重金属浓度的季节变化特征,并对重金属元素进行健康风险评价。结果表明:As、Cd、Cr、Ni和Pb采样期间均值浓度分别为(13.47±14.80),(4.85±6.26),(13.23±12.45),(17.49±14.47),(115.42±94.80)ng/m^3,As、Cd和Pb的均值浓度分别是GB 3095—2012《环境空气质量标准》二级标准规定的年均浓度的2.2,0.9,0.2倍,As超标程度较为严重。邯郸市PM_(2.5)中重金属元素的暴露风险水平较高,且Cr在冬季对成年男性和成年女性存在致癌风险,超额危险度分别为1.79×10^(-6)和1.62×10^(-6),是人群可接受的危险水平(1×10^(-6))的1.79,1.62倍。

The fine particulate matter（ PM_（2.5）） were collected in Handan. The seasonal variation characteristics of heavy metals in PM_（2.5） and its health risk assessment on human body were discussed. The average concentrations of As,Cd,Cr,Ni and Pb were（ 13. 47 ± 14. 80）,（ 4. 85 ± 6. 26）,（ 13. 23 ± 12. 45）,（ 17. 49 ± 14. 47）,（ 115. 42 ± 94. 80） ng/m3,respectively. The average concentrations of As,Cd and Pb were 2. 2,0. 9,0. 2 times that of＂Ambient Air Quality Standards＂（ GB 3095—2012）,respectively. Concentrations of As exceeded the standard seriously. The exposure risk of heavy metal elements in PM（2.5） of Handan had a high level. Cr had carcinogenic risk for adult in winter of Handan. The excess risk of Cr for adult male and female was 1. 79 × 10（-6） and 1. 62 × 10（-6）,respectively,and that exceeded the acceptable risk level（ 1 ×10（-6）） of 1. 79,1. 62 times,respectively.