太原市冬季PM_(2.5)中多环芳烃、硝基多环芳烃、SO_4^(2-)和NO_3^-的污染特征  

Pollution Characteristics of PM_(2.5) PAHs,NPAHs,SO_4^(2-)and NO_3^- in Wintertime in Taiyuan City

作　　者：李瑞金[1] 耿红[1] 蔡宗苇[2] 宋沼鹏 徐丽敏[1] 陈洁[1] 陈鸣晖 

机构地区：[1]山西大学环境科学研究所,山西太原030006 [2]香港浸会大学化学系,中国香港999077

出　　处：《建材技术与应用》2014年第1期12-15,共4页Research and Application of Building Materials

基　　金：国家自然科学基金项目(21177078);山西省回国留学人员科研资助项目(2013-016);山西省国际科技合作项目(2012081010);山西省百人计划项目;山西省大学生创新创业训练计划项目

摘　　要：以太原市2013年冬季大气细颗粒物(PM2.5)为研究对象,定性与定量分析了其中多环芳烃(PAHs)、硝基多环芳烃(NPAHs)、硫酸盐(SO2-4)和硝酸盐(NO-3)的浓度及其昼夜变化。采用特征比值法分析了PAHs、SO2-4和NO-3的来源,并通过PEFs毒性评价法评价了PM2.5中PAHs的BaP等效毒性,估算出个体致癌指数。结果显示,太原市PM2.5中16种PAHs总含量、3种NPAHs总含量及SO2-4和NO-3含量分别在102~153 ng/m3、0.41~0.48 ng/m3、4.89~5.87μg/m3和1.69~1.71μg/m3范围内,且其夜间浓度均高于白天。PAHs的BaP等效毒性和个体致癌指数超过标准值。结果提示,太原市PM2.5中PAHs、NPAHs、SO2-4和NO-3污染主要是由于燃料燃烧和固定源引起的,且颗粒物上的PAHs浓度高,对人体健康有潜在的风险。The concentrations of polycyclic aromatic hydrocarbons （ PAHs ）, nitrated PAHs （ NPAHs ）, sulfate （ SO12 - ） and nitrate （ NO3 ） in wintertime ambient fine particles （PM2.5 ） in Taiyuan and their diurnal variation are studied. The possible sources of PAHs, NPAHs, SOl- and NO3- are estimated by specific values. The BaP equivalent toxicity of PAHs in the particulate matter is evaluated by the PEFs, and the individual carcinogenieity index is calculated. The result shows that the total contents of the 16 PAHs, 3 NPAHs, SO]- and NO3- in atmospheric particles in Taiyuan are in the range of 102 - 153 ng/m3 ,0.41 - 0. 48 ng/m3 ,4.89 N 5. 87 μg/m3 and 1.69 - 1.71 μg/m3 respectively. Their concentrations in night -time are higher than in day - time. The BaPeq and the individual carcinogenic index of PAHs exeeeds the standard values. It is suggested that fuel consumption and stationary sources are the main sources of PM2.5 pollutant in Taiyuan and PM2.5 -bound PAHs pose a potential threat to human health.

关 键 词：PM2 5 多环芳烃 硝基多环芳烃 硫酸盐 硝酸盐 太原市 

分 类 号：X51[环境科学与工程—环境工程]