2022年包头市两城区大气PM_(2.5)中水溶性离子污染特征及源解析  

Pollution characteristics and source apportionment of water-soluble ions in atmospheric PM_(2.5) in two urban areas of Baotou city,China,2022

作　　者：芦静 纪越[2] 孙沁园 冯晓冬[1] LU Jing;JI Yue;SUN Qin-yuan;FENG Xiao-dong(Baotou Center for Disease Control and Prevention,Baotou 014030,China;The Third Hospital of Baogang Group)

机构地区：[1]包头市疾病预防控制中心,包头014030 [2]包钢集团第三职工医院

出　　处：《环境卫生学杂志》2024年第12期1001-1005,共5页JOURNAL OF ENVIRONMENTAL HYGIENE

基　　金：内蒙古自治区预防医学会环境卫生科研项目(2023NMYF-HJZD001);2023年包头市青年创新人才项目(2023年)。

摘　　要：目的分析包头市东河区及青山区两城区大气PM_(2.5)中水溶性离子的污染特征及源解析。方法于2022年全年每月10-16日及雾霾天在包头市东河区及青山区两个监测点采集大气PM_(2.5)样品,利用离子色谱法检测大气PM_(2.5)中5种水溶性离子(SO_(4)^(2-)、NO_(3)^(-)、Cl^(-)、F^(-)、NH_(4)^(+))的质量浓度;运用硫氧化率(sulfur oxidation ratio,SOR)、氮氧化率(nitrogen oxidation ratio,NOR)判断大气中SO_(2)和NO_(2)的二次转化情况;运用[NO_(3)^(-)]/[SO_(4)^(2-)]比值判断大气污染主要是固定污染源还是移动污染源。结果东河区和青山区监测点大气PM_(2.5)中SO_(4)^(2-)、NO_(3)^(-)、Cl^(-)、F^(-)、NH_(4)^(+)质量浓度M(P 25,P 75)分别为3.282(2.055,4.620)、1.510(0.747,3.284)、0.916(0.268,1.750)、0.228(0.097,0.473)、1.553(0.829,3.019)μg/m^(3)和2.856(1.720,4.963)、1.451(0.747,2.940)、0.679(0.171,1.860)、0.177(0.076,0.423)、1.408(0.672,2.272)μg/m^(3);东河区大气PM_(2.5)中硫氧化率(SOR)第一季度最高,青山区第三季度最高;东河区和青山区大气PM_(2.5)中氮氧化率(NOR)均以第一季度最高;东河区和青山区全年[NO_(3)^(-)]/[SO_(4)^(2-)]比值分别为0.49和0.48。结论包头市两城区大气PM_(2.5)中5种水溶性离子污染水平有一定差异,固定污染源为本市大气污染的主要污染源。Objective To analyze the pollution characteristics and source apportionment of water-soluble ions in atmospheric fine particulate matter(PM_(2.5))in Donghe district and Qingshan district of Baotou city,China.Methods On the 10th-16th days of each month and haze days in 2022,atmospheric PM_(2.5)samples were collected at two surveillance sites in Donghe district and Qingshan district of Baotou city,and the mass concentrations of five water-soluble ions(SO_(4)^(2-),NO_(3)^(-),Cl^(-),F^(-),and NH_(4)^(+))in atmospheric PM_(2.5)were determined by ion chromatography.The secondary conversion of SO_(2)and NO_(2)in the atmosphere was determined by sulfur oxidation ratio(SOR)and nitrogen oxidation ratio(NOR).Whether the air pollution was caused by stationary pollution sources or mobile pollution sources was determined by[NO_(3)^(-)]/[SO_(4)^(2-)]ratio.Results The mass concentrations M(P 25,P 75)of SO_(4)^(2-),NO_(3)^(-),Cl^(-),F^(-),and NH_(4)^(+)in atmospheric PM_(2.5)at the surveillance sites in Donghe district and Qingshan district were 3.282(2.055,4.620),1.510(0.747,3.284),0.916(0.268,1.750),0.228(0.097,0.473),1.553(0.829,3.019)μg/m^(3)and 2.856(1.720,4.963),1.451(0.747,2.940),0.679(0.171,1.860),0.177(0.076,0.423),and 1.408(0.672,2.272)μg/m^(3),respectively.The SOR of atmospheric PM_(2.5)was the highest in the first quarter in Donghe district and the highest in the third quarter in Qingshan district.The NOR of atmospheric PM_(2.5)in both Donghe district and Qingshan district was the highest in the first quarter.The annual[NO_(3)^(-)]/[SO_(4)^(2-)]ratios in Donghe district and Qingshan district were 0.49 and 0.48,respectively.Conclusion In two urban areas of Baotou city,there are some differences in the pollution levels of five water-soluble ions in atmospheric PM_(2.5).Stationary pollution sources are the main sources of air pollution in this city.

关 键 词：细颗粒物(PM_(2.5)) 水溶性离子 污染特征 

分 类 号：R122[医药卫生—环境卫生学]