西宁市北郊大气PM_(2.5)中多环芳烃污染特征研究  

Pollution characteristics of polycyclic aromatic hydrocarbons in PM_(2.5)in northern suburb of Xining City

作　　者：胡晓峰[1] 尹永正 童彦斌 芮新素 Hu Xiaofeng;Yin Yongzheng;Tong Yanbin;Rui Xinsu(School of chemical engineering,Qinghai University,Qinghai Xining 810016)

机构地区：[1]青海大学化工学院,青海西宁810016

出　　处：《江西化工》2021年第2期116-119,共4页Jiangxi Chemical Industry

基　　金：青海大学中青年科研基金(No.2018-QGY-10)。

摘　　要：目的:探讨西宁市北郊四季大气PM_(2.5)中多环芳烃(PAHs)污染物含量及时间分布状况,为治理西宁市北郊大气污染状况提供一定的科学参考。方法:2018年于青海大学化工学院为采样点,于2018年11月,2019年1月、3月、6月四个季节采用石英滤膜对四季各十五天采取60个样品,高效超声萃取后,旋蒸氮吹后,定容。利用GC-MS对16种多环芳烃(苊、二氢苊、蒽、苯并[a]蒽、苯并[a]芘、苯并[b]荧蒽、苯并[g,h,i]苝、苯并[k]荧蒽、崫、二苯并[a,h]蒽,荧蒽、芴、茚并[1,2,3-cd]芘、萘、菲、芘)进行定量分析测定。结果:西宁市北郊大气PM_(2.5)日平均质量浓度呈冬季(65.03μg/m^(3))>秋季(53.17μg/m^(3))>春季(35.03μg/m^(3))>夏季(14.67μg/m^(3)),PM_(2.5)中Σ16PAHs年平均浓度为253.94ng/m^(3),其中冬季Σ16PAHs平均浓度为385.30ng/m^(3),秋季为121.99 ng/m^(3),夏季为217.39 ng/m^(3),春季为291.09 ng/m^(3),明显冬季浓度最为高。检测的16种PAHs中,以崫(Chrysene)含量最高,为41.89 ng/m^(3),其中苯并[a]芘为20.88 ng/m^(3)超过《环境空气质量标准》(GB/3095—2012)1 ng/m^(3)的20倍,16种PAHs以3环4环结构为主,占TPAHs总量的81%以上。结论:西宁市北郊大气PM_(2.5)中PAHs时间分布较为明显,冬季最为严重,部分单值含量严重超标,污染水平较高。Objective:To investigate the content and temporal distribution of polycyclic aromatic hydrocarbons(PAHs)in air PM_(2.5)in the northern suburb of Xining in four seasons,and to provide some scientific reference for the control of air pollution in the northern suburb of Xining.Methods:In 2018,is due to sampling point of qinghai university institute of chemical technology,in November 2018,in January 2019,march,June,four seasons using quartz membrane filter for each of the four seasons to 60 samples,15 days after ultrasonic extraction is effective,using GC-MS of 16 kinds of polycyclic aromatic hydrocarbons(acenaphthene,dihydrogen acenaphthene,anthracene,benzo[a]anthracene,benzo[a]pyrene and benzo[b]fluoranthene,benzene and g,h,I),benzo[k]fluoranthene,chrysene,diphenyl and[a,h]anthracene,fluoranthene,fluorene,indene and[1,2,3-cd]pyrene,naphthalene,phenanthrene,pyrene)to determine quantitative analysis.Results:The average daily mass concentration of atmospheric PM_(2.5)in xining after mu(65.03μg/m^(3))in winter>autumn after mu(53.17μg/m^(3))>spring after mu(35.03μg/m^(3))>summer after mu(14.67μg/m^(3)),PAHs in PM_(2.5)Σ16PAHs annual average concentration of 253.94 ng/m^(3)after,winter PAHsΣ16PAHs average concentration of 385.30 ng/m^(3)after the fall of 121.99 ng/m^(3)after,is 217.39 ng/m^(3)after the summer,after the spring of 291.09 ng/m^(3),The concentration was the highest in winter.Detection of 16 kinds of PAHs,Chrysene,Chrysene content is the highest,41.89 ng/m after,including benzo[a]pyrene was 20.88 ng/m^(3)after more than GB/3095-2012 ambient air quality standard 1 ng/m after 20 times,16 kinds of PAHs is given priority to with three-ring sihuan structure,accounting for over 81%of the total TPAHs.Conclusions:The temporal distribution of PAHs in air PM_(2.5)in the northern suburb of Xining is obvious,and it is the most serious in winter,with some single value content exceeding the standard seriously and high pollution level.

关 键 词：西宁北郊 PM_(2.5) 多环芳烃 平均浓度 

分 类 号：X513[环境科学与工程—环境工程]