鞍山市城区夏季PM_(2.5)中多环芳烃组成特征及来源解析  

Composition characteristics and source analysis of PAHs in PM_(2.5) in Anshan City in summer

作　　者：赵静波[1] 姬亚芹[1] 单春艳[1] 王伟[2] 李金[2] 丁岚[2] 张诗建 朱振宇[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]鞍山市环境监测中心站,辽宁鞍山114004

出　　处：《环境污染与防治》2015年第11期72-75,82,共5页Environmental Pollution & Control

摘　　要：通过采集鞍山市城市PM2。样品，使用气相色谱质谱联用仪分析PM25样品中的多环芳烃（PAHs）含量，并进行PAHs组成特征及来源研究。结果表明，鞍山市6个采样点13种PAHs质量浓度总和为10．54～14．26ng／m^3，平均为12．08ng／m^3，苯并[a]芘日均浓度均未超过《环境空气质量标准》（GB3095—2012）日均浓度限值；低分子量PAHs比例较低，5、6环PAHs呈相对优势分布，表明交通污染源对鞍山市PMzs中的PAHs贡献较大；利用比值法和主成分分析（PCA）法对PAHs来源进行解析，两种方法均表明，PAHs污染主要来自柴油、煤炭燃烧源和焦炉源，污染类型为煤烟和交通复合型。The ambient particulate matters PMz.5 in Anshan City were sampled. Polycyclic aromatic hydrocar- bons （PAHs） in PMas were analyzed by gas chromatography-mass spectrometer （GC-MS）,and then its composition characteristics and sources were explored. The mass concentrations of 13 types of PAHs at 6 sampling points ranged from 10.54 to 14.26 ng/m^3 with a mean mass concentration of 12.08 ng/m^3. All the daily average concentrations of benzo[a]pyrene met the ＂Ambient air quality standards＂ （GB 3095-2012）. The contents of low molecular weight PAHs were low,and the compounds with 5 and 6 rings were in relatively advantageous distribution, which indicated that the main source of PM2.5 came from transportation. By principal components analysis （PCA） and diagnostic ratio analysis, the main contributions of PAHs were suggested the combustion of diesel oil and coal and the emission from coke oven. The pollution was a mixed mode combining soot and transportation.

关 键 词：多环芳烃 PM2.5 分布 来源解析 鞍山市 

分 类 号：X513[环境科学与工程—环境工程]