【摘要】 通过在武汉某高校校园的生活区、运动场、实验田区和施工区布设4个采样点,检测分析PM_2.5及其中金属元素和水溶性无机离子的含量。结果表明,施工区PM_2.5平均值超标0. 3倍,其余三区均达标,校园大气环境总体良好; PM_2.5中质量浓度较高的元素为Fe、Mg、Mn、Pb; Cd、Pb的富集因子> 100,判断其来源于建筑施工、实验田翻耕、汽车尾气等人为污染; PM_2.5中主要水溶性无机离子为SO₄^2-和NO₃^-,生活区、施工区的NO₃^-及生活区的SO₄^2-主要来源于二次污染,施工区SO₄^2-来源于二次污染和施工材料; X射线衍射显示施工区PM_2.5中存在石英、高岭石等矿物。更多还原

【Abstract】 The content of PM_2.5 as well as metal elements and water-soluble inorganic ions in it from 4 sampling sites representing respectively living quarters,sports field,experimental field and construction area in a university in Wuhan were analyzed. The results showed that the mean value of PM_2.5 in construction area was 0. 3 times over the standard,while in the rest 3 areas,it achieved the standard,indicating good atmospheric environment on the campus. The concentration of Fe,Mg,Mn,Pb in PM_2.5 were high. The enrichment factor of Cd and Pb were greater than 100,and they were judged as from building construction,experimental field tillage,automobile exhaust and other man-made pollution. The main water-soluble inorganic ions in PM_2.5 were SO₄^2-and NO3-. SO₄^2-and NO₃^-from living quarters,and NO₃^-from construction area were mainly derived from secondary pollution. SO₄^2-in construction area was from secondary pollution and construction materials. Quartz and kaolinite were detected in PM_2.5 from construction area by X-ray diffraction method.更多还原