冬奥会前后北京市细颗粒物的化学组成及来源

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摘要为评估环境空气质量管控措施对北京市PM_2.5化学组成的影响,于2022年冬奥会前后在北京城区及西北方向山区背景站点同时开展观测,分析PM_2.5样品中水溶性无机离子及碳质组分浓度变化.结果显示,城区与山区PM_2.5中碳质组分差异明显.山区PM_2.5中有机碳(OC)及元素碳(EC)的平均质量浓度比值为28.99,水溶性有机碳(WSOC)占OC的平均比例为77%,均显著高于城区(OC:EC = 12.93, WSOC:OC = 48%).观测期间,京津冀地区及辽东半岛是城区PM_2.5各组分(Ca²⁺除外)的主要潜在源区;而山区既受京津冀地区排放影响,还受来自河套平原方向的传输影响.随时间推移,城区有机物(OM)在PM_2.5中的占比由22.7%上升至31.7%,山区由27.7%上升至34.9%,可能指示观测后期气温上升、太阳辐射增强促进了二次有机物生成,或指示排放源发生变化.冬奥期间,城区硝酸盐质量浓度及其在PM_2.5中的占比下降、硫酸盐的占比上升,体现了交通限行措施的效果.城区PM_2.5中,阴阳离子当量比由0.96逐步上升至1.20,酸性逐渐增强,可能反映了管控措施放松后NO_x排放的快速反弹.观测期间,燃烧源及二次源对两站点PM_2.5质量浓度的总贡献率均超过70%,反映了人为源颗粒物对北京市PM_2.5的显著贡献.另一方面,与冬奥前相比,冬奥期间城区站点的该贡献率降低 8.7%,表明严格的管控措施总体上抑制了人为源排放.相较于往年同期,冬奥期间北京城区PM_2.5主要组分的质量浓度均明显下降.虽然气象条件不利于污染物扩散,但空气质量管控措施仍使冬奥期间北京市空气质量达到近年来的同期最优水平.

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	黄子烨
	胡伟
	靳蕊
	侯升杰
	李萍
	毕凯
	何昌华
	王亚杰
	段沛敏
	刘頔
	吴礼彬
	邓君俊
	孙业乐
	傅平青

关键词 ： PM_2.5, 化学组成, 潜在源区, 冬奥会, 管控措施, 北京

Abstract：To quantify the impact of air quality control measures on the chemical composition of PM_2.5 in Beijing, simultaneous observations were carried out at an urban site and a montane background site located northwest of the city around the 2022 Winter Olympics. PM_2.5 samples were analyzed for water-soluble inorganic ions and carbonaceous components. Results demonstrated a significant difference in carbonaceous contents between the urban and montane sites. At the montane site, the mean mass ratio of organic carbon (OC) to elemental carbon (EC) was 28.99, and the mean proportion of water-soluble OC (WSOC) in OC was 77%, both of which were significantly higher than at the urban site (12.93 and 48%, respectively). During the observation period, the Beijing-Tianjin-Hebei region and the Liaodong Peninsula were the dominant potential source regions of all the chemical components at the urban site, except for Ca²⁺. Apart from emissions from the Beijing-Tianjin-Hebei region, particles transported from the Hetao Plain also affected the montane site. The proportion of organic matter (OM) in PM_2.5 increased from 22.7% to 31.7% at the urban site, and from 27.7% to 34.9% at the montane site, which might indicate that elevated temperatures and solar radiation favored secondary organic aerosol formation, or that emission sources changed during the latter part of the observation period. During the Winter Olympics, the mass concentration and proportion of nitrates in PM_2.5 declined, while the proportion of sulfates increased at the urban site, highlighting the effect of traffic control. The equivalence ratio of anions to cations in PM_2.5 at the urban site gradually rose from 0.96 to 1.20, exhibiting elevated acidity. This result may be closely linked to the formation of nitric acid, suggesting a fast rebound in NO_x emissions after partial lifting of control measures. Throughout the observation period, the contribution of combustion and secondary sources to PM_2.5 exceeded 70% at both sites, reflecting the dominant contribution of anthropogenic particles to PM_2.5 in Beijing. However, their contribution dropped by 8.7% during the Winter Olympics at the urban site, indicating that the control of anthropogenic emissions was effective. All the major components in urban PM_2.5 declined significantly during the Winter Olympics compared to similar periods in past years. The control measures led to the best air quality during the Winter Olympics compared to similar periods in recent years, despite unfavorable meteorological conditions for pollutant dispersion.

Key words： PM_2.5 chemical composition potential source regions Winter Olympics control measures Beijing

收稿日期: 2024-02-22

PACS:

X513

基金资助:国家自然科学基金(42130513,92044301,42105091);海南省基础与应用基础研究计划(821MS150);北京市自然科学基金(8222053)

通讯作者: 胡伟,副教授,huwei@tju.edu.cn E-mail: huwei@tju.edu.cn

作者简介: 黄子烨(1999-),男,福建邵武人,天津大学地球系统科学学院硕士研究生,主要研究方向为大气气溶胶的成冰活性.huangziye@tju.edu.cn.

引用本文:

黄子烨, 胡伟, 靳蕊, 侯升杰, 李萍, 毕凯, 何昌华, 王亚杰, 段沛敏, 刘頔, 吴礼彬, 邓君俊, 孙业乐, 傅平青. 冬奥会前后北京市细颗粒物的化学组成及来源[J]. 中国环境科学, 2024, 44(10): 5344-5356. HUANG Zi-ye, HU Wei, JIN Rui, HOU Sheng-jie, LI Ping, BI Kai, HE Chang-hua, WANG Ya-jie, DUAN Pei-min, LIU Di, WU Li-bin, DENG Jun-jun, SUN Ye-le, FU Ping-qing. Chemical composition and sources of fine particles in Beijing around the Winter Olympics. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(10): 5344-5356.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2024/V44/I10/5344

[1] Rosenfeld D, Sherwood S, Wood R, et al. Climate effects of aerosol-cloud interactions [J]. Science, 2014,343(6169):379-380.
[2] Janssen N A H, Hoek G, Simic-Lawson M, et al. Black carbon as an additional indicator of the adverse health effects of airborne particles compared with PM₁₀ and PM_2.5 [J]. Environmental Health Perspectives, 2011,119(12):1691-1699.
[3] 国家统计局.中国统计年鉴2022[M]. 北京:中国统计出版社, 2022. National Bureau of Statistics of China. China Statistical Yearbook 2022[M]. Beijing: China Statistics Press, 2022.
[4] 刘玥晨,满睿琪,裘彦挺,等.北京冬季奥运会历史同期大气PM_2.5污染特征分析[J]. 环境科学, 2022,43(8):3896-3902. Liu Y C, Man R Q, Qiu Y T, et al. Characteristics of PM_2.5 Pollution in Beijing During the Historical Period of the 2022 Olympic Winter Games [J]. Environmental Science, 2022,43(8):3896-3902.
[5] An Z, Huang R J, Zhang R, et al. Severe haze in northern China: A synergy of anthropogenic emissions and atmospheric processes [J]. Proceedings of the National Academy of Sciences of the United States of America, 2019,116(18):8657-8666.
[6] Zhang H, Wang S, Hao J, et al. Air pollution and control action in Beijing [J]. Journal of Cleaner Production, 2016,122:1519-1527.
[7] Li Y, Sun G, Di P. Evaluation of government performance in haze pollution control and the optimization path in Beijing [J]. Chinese Journal of Urban and Environmental Studies, 2020,8(3):2050014.
[8] 赵素平,余晔,殷代英.交通限行对细颗粒物浓度及其谱分布的影响[J]. 高原气象, 2015,34(3):777-785. Zhao S, Yu Y, Yin D, et al. Effect of Traffic Restriction on Fine Particle Concentrations and Their Size Distributions [J]. Plateau Meteorology, 2015,34(3):777-785.
[9] 毛敏娟,杜荣光,吴建.杭州G20减排措施对大气水溶性离子特征的影响[J]. 中国环境科学, 2019,39(6):2283-2290. Mao M J, Du R G, Wu J. Influences of the G20 emission reduction on characteristics of water-soluble ions in PM in Hangzhou [J]. China Environmental Science, 2019,39(6):2283-2290.
[10] 赵崴,陈光明,李东辉,等.深圳大运会期间环境控制措施对气溶胶特性的影响分析[J]. 中国环境监测, 2012,28(6):82-88. Zhao W, Chen G M, Li D H, et al. Analysis of Environmental Control Effect on Aerosol Properties during the Universiade at Shenzhen [J]. Environmental Monitoring in China, 2012,28(6):82-88.
[11] 赵辉,郑有飞,徐静馨,等.APEC期间京津冀区域大气污染物消减变化分析[J]. 干旱区地理, 2016,39(6):1221-1229. Zhao H, Zheng Y F, Xu J X, et al. Air pollution abatement in Beijing- Tianjin-Hebei during the APEC period [J]. Arid Land Geography, 2016,39(6):1221-1229.
[12] Wang Y Q. An Open source software suite for multi-dimensional meteorological data computation and visualisation [J]. Journal of Open Research Software, 2019,7(1):21.
[13] Zhang H, Wang X, Shen X, et al. Analysis of air pollution characteristics, transport pathways and potential source areas identification in Beijing around the COVID-19 outbreak [J]. Frontiers in Environmental Science, 2022,10:982566.
[14] Berriban I, Azahra M, Chham E, et al. PSCF and CWT methods as a tool to identify potential sources of ⁷Be and ²¹⁰Pb aerosols in Granada, Spain [J]. Journal of Environmental Radioactivity, 2022,251-252:106977.
[15] HJ 1353—2024环境空气颗粒物来源解析正定矩阵因子分解模型计算技术指南[S]. HJ 1353—2024 Ambient air—Source apportionment on particulate matter—Technical guide on the calculation of positive matrix factorization model [S].
[16] 张恒德,张碧辉,吕梦瑶,等.北京地区静稳天气综合指数的初步构建及其在环境气象中的应用[J]. 气象, 2017,43(8):998-1004. Zhang H, Zhang B, Lü M, et al. Development and Application of Stable Weather Index of Beijing in Environmental Meteorology [J]. Meteorological Monthly, 2017,43(8):998-1004.
[17] Zhang R, Jing J, Tao J, et al. Chemical characterization and source apportionment of PM_2.5 in Beijing: seasonal perspective [J]. Atmospheric Chemistry and Physics, 2013,13:7053-7074.
[18] Yang Y, Zhou R, Wu J, et al. Seasonal variations and size distributions of water-soluble ions in atmospheric aerosols in Beijing, 2012[J]. Journal of Environmental Sciences, 2015,34:197-205.
[19] 贾岳清,殷惠民,周瑞,等.北京初冬季PM_2.5中无机元素与二次水溶性离子浓度特征[J]. 环境化学, 2018,37(12):2767-2773. Jia Y, Yin H, Zhou R, et al. Characteristics of water-soluble inorganic ions and inorganic elements of PM_2.5 in Beijing [J]. Environmental Chemistry, 2018,37(12):2767-2773.
[20] 张兴华,王政,霍鹏,等.北京怀柔PM_2.5中环境持久性自由基及共存健康风险物质的污染特征[J]. 环境化学, 2022,41(3):813-822. Zhang X, Wang Z, Huo P, et al. Pollution characteristics of environmental persistent free radicals and coexisting health risk substances in PM_2.5 in Huairou, Beijing [J]. Environmental Chemistry, 2022,41(3):813-822.
[21] 侯露,朱媛媛,刘冰,等.冬奥会期间京津冀及周边区域空气质量时空特征、气象影响和减排效果评估[J]. 环境科学, 2023,44(11): 5899-5914. Hou L, Zhu Y Y, Liu B, et al. Analysis of spatio temporal characteristics of air quality, meteorological impact, and emission reduction effect during the winter olympics in Beijing-Tianjin-Hebei and its surrounding areas [J]. Environmental Science, 2023,44(11):5899-5914.
[22] Tang X, Zhang X, Wang Z, et al. Water-soluble organic carbon (WSOC) and its temperature-resolved carbon fractions in atmospheric aerosols in Beijing [J]. Atmospheric Research, 2016,181:200-210.
[23] 于海斌,薛荔栋,郑晓燕,等.APEC期间京津冀及周边地区PM_2.5中碳组分变化特征及来源[J]. 中国环境监测, 2015,31(2):48-52. Yu H B, Xue L D, Zheng X Y, et al. Characterization and Sources of Carbonaceous Components in PM_2.5 during the APEC in Beijing- Tianjin-Hebei Region [J]. Environmental Monitoring in China, 2015, 31(2):48-52.
[24] 王倩倩,权建农,程志刚,等.2019年冬季北京海陀山局地环流特征及机理分析[J]. 气象学报, 2022,80(1):93-107. Wang Q, Quan J, Cheng Z, et al. Local circulation characteristics and mechanism analysis of Haituo mountain in Beijing during winter 2019[J]. Acta Meteorologica Sinica, 2022,80(1):93-107.
[25] 李青春,李炬,郑祚芳,等.冬季山谷风和海陆风对京津冀地区大气污染分布的影响[J]. 环境科学, 2019,40(2):513-524. Li Q C, Li J, Zheng Z F, et al. Influence of Mountain Valley Breeze and Sea Land Breeze in Winter on Distribution of Air Pollutants in Beijing-Tianjin-Hebei Region [J]. Environmental Science, 2019, 40(2):513-524.
[26] Chow J C, Riggio G M, Wang X, et al. Measuring the organic carbon to organic matter multiplier with thermal/optical carbon-quadrupole mass spectrometer analyses [J]. Aerosol Science and Engineering, 2018,2:165-172.
[27] Chen X, Yu J Z. Measurement of organic mass to organic carbon ratio in ambient aerosol samples using a gravimetric technique in combination with chemical analysis [J]. Atmospheric Environment, 2007,41:8857-8864.
[28] 吴伟,姚小红.污染物减排背景下北京大气颗粒物化学组成变化特征[J]. 中国海洋大学学报, 2023,53(1):32-41. Wu W, Yao X. Variation characteristics of chemical composition of atmospheric particulate matter in Beijing under the background of pollutant emission reduction [J]. Periodical of Ocean University of China, 2023,53(1):32-41.
[29] Zhou Q, Guo H R, Yang P R, et al. Solubility of SO₂ in water from 263.15 to 393.15K and from 10 to 300 bar: Quantitative raman spectroscopic measurements and PC-SAFT prediction [J]. Industrial & Engineering Chemistry Research, 2020,59(28):12855-12861.
[30] Meng C C, Wang L T, Zhang F F, et al. Characteristics of concentrations and water-soluble inorganic ions in PM_2.5 in Handan City, Hebei province, China [J]. Atmospheric Research, 2016,171:133-146.
[31] Sun Y, Zhuang G, Tang A, et al. Chemical characteristics of PM_2.5and PM₁₀in haze−fog episodes in Beijing [J]. Environmental Science & Technology, 2006,14(10):3148-3155.
[32] Xiao H, Ding S Y, Ji C W, et al. Combustion related ammonia promotes PM_2.5 accumulation in autumn in Tianjin, China [J]. Atmospheric Research, 2022,275:106225.
[33] 张延君,郑玫,蔡靖,等.PM_2.5源解析方法的比较与评述[J]. 科学通报, 2015,60(2):109-121,1-2. Zhang Y J, Zheng M, Cai J, et al. Comparison and overview of PM_2.5 source apportionment methods [J]. Chinese Science Bulletin, 2015, 60(2):109-121,1-2.
[34] Gao X, Nie W, Xue L, et al. Highly time-resolved measurements of secondary ions in PM_2.5 during the 2008 Beijing Olympics: The impacts of control measures and regional transport [J]. Aerosol and Air Quality Research, 2013,13:367-37.
[35] Wang S, Gao J, Zhang Y, et al. Impact of emission control on regional air quality: An observational study of air pollutants around the Beijing Olympic Games [J]. Journal of Environmental Sciences, 2014,26:175-180.
[36] 王羽琴,张元勋,张阳,等.深圳大运会前后大气含碳气溶胶污染特征[J]. 中国环境科学, 2014,34(8):1973-1978. Wang Y Q, Zhang Y X, Zhang Y, et al. Characterization of carbonaceous aerosols during and post-Shenzhen UNIVERSIADE period [J]. China Environmental Science, 2014,34(8):1973-1978.
[37] Xu W Q, Sun Y L, Chen C, et al. Aerosol composition, oxidation properties, and sources in Beijing: results from the 2014 Asia-Pacific Economic Cooperation summit study [J]. Atmospheric Chemistry and Physics, 2015,15:13681-13698.
[38] 杨懂艳,刘保献,张大伟,等.2014年APEC前后北京城区PM_2.5中水溶性离子特征分析[J]. 环境科学, 2015,36(12):4325-4330. Yang D Y, Liu B X, Zhang D W, et al. Characterization of Water- soluble Ions in PM_2.5 of Beijing During 2014 APEC [J]. Environmental Science, 2015,36(12):4325-4330.
[39] 刘喆,李娜,李韵谱,等.2014年北京APEC会议前后空气黑碳气溶胶变化特征分析[J]. 环境与健康杂志, 2018,35(11):951-954. Liu Z, Li N, Li Y P, et al. Variation in characteristics of black carbon aerosol before, during and after APEC conference held in Beijing, 2014[J]. Journal of Environment and Health, 2018,35(11):951-954.
[40] 黄为,李正强,谢一凇,等.2015年世界田联赛期间北京地区气溶胶成分遥感分析[J]. 中国环境监测, 2017,33(2):158-164. Huang W, Li Z, Xie Y, et al. Remote sensing estimation of aerosol composition during the 15th IAAF World Championships [J]. Environmental Monitoring in China, 2017,33(2):158-164.
[41] 赵军平,罗玲,郑亦佳,等.G20峰会期间杭州地区空气质量特征及气象条件分析[J]. 环境科学学报, 2017,37(10):3885-3893. Zhao J, Luo L, Zheng Y, et al. Analysis on air quality characteristics and meteorological conditions in Hangzhou during the G20 summit [J]. Acta Scientiae Circumstantiae, 2017,37(10):3885-3893.
[42] 沈建东,杨乐,朱溆君,等.杭州G20峰会期间PM_2.5短时污染事件分析[J]. 四川环境, 2020,39(3):45-50. Shen J D, Yang L, Zhu S J, et al. Research on a Short-term PM_2.5 Pollution Episode During the Hangzhou G20 Summit [J]. Sichuan Environment, 2020,39(3):45-50.
[43] 潘锦秀,晏平仲,李云婷,等.北京冬奥会同期空气污染数值模拟[J]. 环境科学研究, 2017,30(9):1325-1334. Pan J, Yan P, Li Y, et al. Air Pollution Numerical Simulation during the Same Period of Beijing Winter Olympic Games [J]. Research of Environmental Sciences, 2017,30(9):1325-1334.