摘要
目的掌握佛山市禅城区PM2.5中的质量浓度、多环芳烃(PAHs)浓度、金属元素浓度、水溶性离子浓度的变化规律,并分析其可能的影响因素。方法2016年—2020年对禅城区固定点位进行PM2.5采样分析质量浓度、多环芳烃浓度、金属元素浓度、水溶性离子浓度。结果2016年—2020年共收集到400份PM2.5样品,其质量浓度年平均值为(0.055±0.035)mg/m^(3),总体超出国家环境标准二级水平;多环芳烃的组成以中高环多环芳烃为主;所监测多种金属元素浓度均低于《环境空气质量标准》(GB 3095—2012)规定的金属离子浓度限量值,提示风险等级较低;硝酸盐浓度与硫酸盐浓度的比值提示大气的污染源既有来源于固定源,也有来源于移动源。结论禅城区大气PM2.5中各成分成季节性变化,PM2.5的浓度变化与多环芳烃的浓度,金属元素的浓度和水溶性离子的浓度成正相关,可为PM2.5的监测、预警、防治和改善提供科学依据。
Objective This paper aims to investigate the potential dynamic rules of mass concentration,polycyclic aromatic hydrocarbons(PAHs)concentration,metal elements concentration and water-soluble ions concentration in atmospheric fine particulate matter(PM2.5)in Chancheng District of Foshan City,and to explore the potential influencing factors.Methods PM2.5 samples were collected from fixed monitoring points in Chancheng District for the analysis of mass concentration,PAHs concentration,metal element concentration and water-soluble ions concentrations.Results A total of 400 PM2.5 samples were collected from 2016 to 2020;the annual mean value of PM2.5 mass concentration was(0.055±0.035)mg/m^(3),which was beyond the second level of national environmental standard;PAHs were mainly composed of high cyclic PAHs.The concentrations of various metal elements were lower than the limit values specified in the ambient air quality standard(GB 3095—2012),indicating that air metal pollution level was relatively mild.The ratio of nitrate concentration to sulfate concentration suggested that both fixed sources and mobile sources contributed to the air pollution.Conclusion The components of atmospheric PM2.5 in Chancheng District exhibited seasonal changes,the concentration changes of PM2.5 were positively correlated with the concentration of polycyclic aromatic hydrocarbons,metal elements and water-soluble ions,thus providing scientific basis for the monitoring,early warning,prevention and control of PM2.5.
作者
肖雪花
曾小鹏
王彦硕
庞智锋
雷宇绯
梁雅慧
XIAO Xue-hua;ZENG Xiao-peng;WANG Yan-shuo;PANG Zhi-feng;LEI Yu-fei;LIANG Ya-hui(Department of Physical and Chemical Laboratory,Foshan Municipal Center for Disease Control and Prevention,Guangdong 528000,China)
出处
《中国卫生检验杂志》
CAS
2023年第6期729-733,共5页
Chinese Journal of Health Laboratory Technology
基金
佛山市医学技术研究项目(20200401)。
关键词
PM2.5
空气污染
多环芳烃
金属元素
水溶性离子浓度
监测研究
PM2.5
Air pollution
Polycyclic aromatic hydrocarbon
Metal elements
Water-soluble ions
Monitoring research
