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目的研究淮南市秋季大气可吸入颗粒物(PM10)中多环芳烃的污染特征。方法于2007年11月采集淮南市交通区、化工区、商业区、文教区和居民区5个功能区大气中的PM10,并利用GC-MS对样品中PAHs进行分析,研究不同功能区PM10中PAHs的种类及其空间污染特征。结果淮南市秋季PM10中含有萘、苊、二氢苊、芴、菲、蒽、荧蒽、芘、苯并[a]蒽、、苯并[b]荧蒽、苯并[k]荧蒽、苯并[a]芘、茚并[1,2,3-cd]芘、二苯并[a,h]蒽、苯并[ghi]苝15种优控多环芳烃化合物。交通区、化工区、商业区、文教区和居民区大气PM10中PAHs的浓度分别为38.28、33.34、45.23、33.78、19.79ng/m3;含量分别为174.68、136.37、164.28、196.92、167.81μg/g。不同环数PAHs所占比例分布较一致,4、5环PAHs含量占优势,在不同功能区均约占多环芳烃总浓度的60%以上。结论不同功能区PM10中PAHs浓度依次为:商业区>交通区>文教区>化工区>居民区;各功能区采样点的PM10中4～5环PAHs占优势,说明淮南市秋季大气中PM10其来源具有一定的相似性。
Objective To study the pollution characteristics of polycyclic aromatic hydrocarbons (PAHs) in the inhalable particulate matter (PM10) of Huainan City in autumn. Methods The PM10 in the five functional areas of Huainan traffic, chemical, commercial, cultural and educational areas and residential areas were collected in November 2007, and the PAHs in the samples were analyzed by GC-MS to study the effects of PM10 in different functional areas Types of PAHs and Their Spatial Pollution Characteristics. Results The fall PM10 in Huainan City contained naphthalene, acenaphthene, dihydroanthracene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo [a] anthracene, benzo [b] fluoranthene, Benzo [a] pyrene, indeno [1,2,3-cd] pyrene, dibenzo [a, h] anthracene and benzo [ghi] perylene. The concentrations of PAHs in PM10 in the traffic, chemical, commercial, cultural, educational and residential areas were 38.28, 33.34, 45.23, 33.78 and 19.79 ng / m3, respectively. The contents of PAHs were 174.68, 136.37, 164.28, 196.92 and 167.81 μg / g . PAHs with different ring number accounted for the same proportion distribution. PAHs 4,5 and PAHs accounted for more than 60% of the total PAHs concentration in different functional zones. Conclusion PAHs concentrations in PM10 in different functional areas are: commercial area> traffic area> cultural and educational area> chemical industry> residential area. PAHs in 4 ~ 5 rings of PM10 in different functional areas are dominant, indicating that PM10 Source has a certain similarity.