沈阳市环境空气PM_(10)中多环芳烃(PAHs)的污染特征及来源研究  

Pollution Characteristics and Sources Analysis of Polycyclic Aromatic Hydrocarbons (PAHs) in PM_(10) in Shenyang City

作　　者：李晶[1] 曲健[1] 李哲 王帅[1] 祝琳琳 Li Jing;Qu Jian;Li Zhe;Wang Shuai;Zhu Linlin(Shenyang Environmental Monitoring Center Station,National Environmental Protection Key Laboratory of Atmospheric Organic Pollutants Monitoring and Analysis,Shenyang 110169,China)

机构地区：[1]沈阳市环境监测中心站国家环境保护大气有机污染物监测分析重点实验室,辽宁沈阳110169

出　　处：《环境科学与管理》2019年第2期128-132,共5页Environmental Science and Management

基　　金：沈阳市科技计划项目(F16-156-9-00)

摘　　要：利用气相色谱-质谱法(GC-MS)定量分析了2016年冬、春、夏、秋(4个代表月份)沈阳市PM_(10)中16种优控多环芳烃(PAHs)含量。结果表明, PAHs日均浓度变化范围为6.9 ng/m^3～274 ng/m^3,平均值为59.3 ng/m^3。不同环数多环芳烃占总浓度的比例为4环>5环>6环>3环>2环,表现出沈阳市明显的燃煤排放特征。通过计算PAHs的苯并(a)芘(Bap)毒性当量浓度(范围0.86 ng/m^3～27.1 ng/m^3,年均值6.5 ng/m^3。),表明沈阳市PAHs对人体健康存在危害。特征化合物比值法和主成分分析法结果表明,煤和木材燃烧及少量的石油挥发是沈阳市大气PM_(10)中PAHs的主要污染源。16 PAHs in PM10 in Shenyang in 2016 winter,spring,summer,and autumn(four representative months)were analyzed by gas chromatography-mass spectrometry(GC-MS).The results showed that the daily average concentration of PAHs varied from 6.9 ng/m^3 to 274 ng/m^3 with the mean value 59.3 ng/m^3.The proportions of different ring numbers of PAHs in the total concentrations were 4 rings>5 rings>6 rings>3 rings>2 rings,showing the obvious characteristics of coal combustion in Shenyang.By calculating the benzo(a)pyrene(Bap)toxicity equivalent concentration of PAHs(ranged from 0.86 to 27.1 ng/m^3 and annual mean value was 6.5 ng/m^3),it was suggested that PAHs in Shenyang were harmful to human health.The results of characteristic compound ratio method and principal component analysis method showed that the combustion of coal and wood and a small amount of petroleum volatilization were the main sources of PAHs in PM10 in Shenyang.

关 键 词：沈阳市 PM10 多环芳烃 来源分析 

分 类 号：X831[环境科学与工程—环境工程]