摘要
目的研究宝鸡市高新区大气PM10中金属元素的浓度变化规律,为其防控提供参考依据。方法使用智能中流量采样器在宝鸡文理学院高新校区于2013年9月至2014年2月进行采样。结果结果分析表明:宝鸡市高新区PM10中4种重金属含量Fe>Zn>Pb>Mn,Fe含量明显高于其他3种重金属;Pb的季平均值分别为0.277μg/m3和0.467μg/m3,未超出《环境空气质量标准》(GB3095-2012)规定标准值(1.0μg/m3),其浓度变化受季节因素的影响较为明显,冬季略高于秋季;而Fe和Zn浓度变化较为平稳,Mn无明显变化。使用潜在生态风险指数法对PM10中的3种重金属进行生态风险评价,按照危害排序从高到低依次为Pb>Zn>Mn。结论宝鸡市高新区大气中PM10污染不容忽视,其Pb,Zn和Mn的污染值得更深入的研究。
Purposes--To detect the concentration changes of heavy metals in PM10 at High-tech Zone in Baoji City, Shaanxi, China and provide reference for the prevention and control of heavy met- als. Methods-- The experiment collected samples with medium-volume PM10 sampler from September 2013 to February 2014 in Baoji University of Arts and Sciences at High-tech Zone of Baoji City. Re- suits- The results showed that the content of the four heavy metals like Fe, Zn, Pb and Mn in PM10 decreased progressively. The concentration of Fe was significantly higher than the other three metals, the seasonal averages of Pb were 0. 277 μg/m3 and 0. 467 μg/m3, which did not exceed 1.0 μg/m3 provided in the ＂Ambient Air Quality Standard＂ （GB3095-2012）. The changes of Pb was affected more obviously by season. The concentration of Pb in winter was more than that in autumn. Howev- er, the concentration changes of Fe and Zn were not obvious. According to data results, the ecological risk of heavy metals in PM10 wasevaluated with the method of potential ecological risk index, the hazard ranking of Pb, Zn and Mn reduced successively. Conclusion--Although the tested concentra- tions of Fe, Zn, Mn and Pb in PM10 from Baoji High-tech Zone have not been beyond 1.0 μg/m3 stip- ulated in the Ambient Air Quality Standard （GB3095-2012）, the impact of heavy metal elements in PM10 in the zone need further research.
出处
《宝鸡文理学院学报（自然科学版）》
CAS
2016年第1期45-49,共5页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
基金
宝鸡文理学院重点项目:(ZK14031)
关键词
PM10
重金属浓度
宝鸡市高新区
风险评估
PM10 heavy metals concentration
High-tech Zone in Baoji
risk assessment
