摘要
为研究河北大气中挥发性有机物(VOCs)对臭氧(O_(3))及二次有机气溶胶(SOA)生成的影响,利用2021年4—10月河北11个地市VOCs的监测数据,对河北VOCs污染特征及其关键活性组分进行分析研究。结果表明,观测期间河北VOCs平均体积分数为36.16×10^(-9),低碳的醛酮类和低碳的烷烃是河北VOCs的主要构成物种。VOCs高值区主要集中在河北中南部沧州、衡水、邯郸、石家庄等地,北部城市秦皇岛、张家口VOCs浓度较低。监测期间,河北O_(3)生成潜势(OFP)为259.67μg/m^(3),SOA生成潜势为0.61μg/m^(3),其中衡水OFP最高,达302.96μg/m^(3),石家庄SOA生成潜势最高,达0.92μg/m^(3)。甲苯、间/对二甲苯和邻二甲苯对OFP及SOA生成潜势的贡献均较大,是O_(3)和大气颗粒物协同控制的优控VOCs物种。
In order to evaluate the impactions of volatile organic compounds(VOCs)on the formation of second organic aerosol(SOA)and O_(3),the VOCs pollution data in 11 cities of Hebei were monitored from April to October of 2021.Then,the pollution characteristics and the key active components of VOCs in Hebei were analyzed.Results showed that the average VOCs volumn fraction of Hebei was 36.16×10^(-9),and low carbon aldehydes,ketones and alkanes were the key VOCs species of Hebei.High-value area of VOCs was mainly concentrated in the central and southern Hebei,containing Cangzhou,Hengshui,Handan,Shijiazhuang,and so on.The VOCs concentrations in northern Hebei like Qinhuangdao and Zhangjiakou were relative low.Average O_(3)formation potential(OFP)and SOA formation potential of Hebei were 259.67 and 0.61μg/m^(3),respectively.Hengshui OFP was the highest of 302.96μg/m^(3) and Shijiazhuang SOA formation potential was the highest of 0.92μg/m^(3).Toluene,m/p-xylene and o-xylene were priority species for both OFP and SOA formation potential,indicating that they were the key components for the coordinated control of O_(3)and atmospheric particulate.
作者
刘新军
王淑娟
范莉茹
宿文康
LIU Xinjun;WANG Shujuan;FAN Liru;SU Wenkang(Hebei Province Ecological Environmental Monitoring Center,Shijiazhuang Hebei 050037;Hebei Provincial Academy of Ecological Environmental Science,Shijiazhuang Hebei 050037)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2023年第2期183-187,193,共6页
Environmental Pollution & Control
基金
河北省重点研发计划项目(No.22373704D)。
关键词
河北
挥发性有机物
臭氧生成潜势
二次有机气溶胶
Hebei
volatile organic compounds
O_(3)formation potential
second organic aerosol
