石家庄市大气PM_(2.5)中PAHs污染特征及来源分析  

Pollution Characteristics and Sources of PAHs in PM_(2.5) in Shijiazhuang

作　　者：张荣芝[1] 王云霞[1] 史密伟[1] 张焱[1] 朱桂艳 Zhang Rongzhi;Wang Yunxia;Shi Miwei;Zhang Yan;Zhu Guiyan(Hebei Engineering Research Center for Geographic Information Applicatio,Institute of Geographical Sciences,Hebei Academy of Sciences,Shijiazhuang 050011,China;Hebei Environmental Emergency and Heavy Pollution Weather Warning Center,Shijiazhuang 050037,China)

机构地区：[1]河北省科学院地理科学研究所,河北省地理信息开发应用工程技术研究中心,河北石家庄050011 [2]河北省生态环境应急与重污染天气预警中心,河北石家庄050037

出　　处：《山东化工》2021年第21期234-237,共4页Shandong Chemical Industry

基　　金：河北省科学院科技计划项目(21109,191401)。

摘　　要：在石家庄市城区内采集2019年全年大气细颗粒物(PM_(2.5))样品,采用气相色谱—质谱法测定其中多环芳烃(PAHs)浓度,分析了石家庄市PM_(2.5)中PAHs的不同时期污染水平、组成特征及主要来源。结果表明,石家庄市PM_(2.5)中总多环芳烃(ΣPAHs)质量浓度年均值为74.12 ng/m^(3),季节规律为春季(19.66 ng/m^(3))<夏季(53.52 ng/m^(3))<秋季(61.03 ng/m^(3))<冬季(145.16 ng/m^(3)),月平均浓度为16.51~230.40 ng/m^(3);单体BkF和Chry的月、季、年均浓度均在ΣPAHs中占比最高;环数分布特征为4环和5环的PAHs含量明显高于3环和6环的;采用特征化合物比值法分析,石家庄市PM_(2.5)中PAHs污染主要来自于液体石化燃料、煤炭和生物质燃烧源。Samples of fine particulate matter(PM_(2.5))were collected in the urban area of Shijiazhuang in 2019.The concentration of polycyclic aromatic hydrocarbons(PAHs)in PM_(2.5) was determined by gas chromatography-mass spectrometry(GC-MS).The pollution level,composition characteristics and main sources of PAHs in PM_(2.5) in Shijiazhuang were analyzed in different periods.The results showed that the average annual concentration of total polycyclic aromatic hydrocarbons(ΣPAHs)in PM_(2.5) in Shijiazhuang was 74.12 ng/m^(3),and the seasonal pattern was as follows:spring(19.66 ng/m^(3))<summer(53.52 ng/m^(3))<autumn(61.03 ng/m^(3))<winter(145.16 ng/m^(3)).The average monthly concentration ranged from 16.51 to 230.40 ng/m^(3).The monthly,seasonal and annual concentrations of monomer BkF and Chry were the highest inΣPAHs.The PAHs content of 4 and 5 rings was significantly higher than that of 3 and 6 rings;Using characteristic compound ratio method,PAHs pollution in PM_(2.5) in Shijiazhuang mainly comes from liquid petrochemical fuel,coal and biomass combustion sources.

关 键 词：大气细颗粒物(PM_(2.5)) 多环芳烃(PAHs) 污染 石家庄市 

分 类 号：X513[环境科学与工程—环境工程]