【PM2.5与O3协同防控科技攻关成果专题】编者按：2017年，国务院常务会议确定设立大气重污染成因与治理攻关项目，由生态环境部牵头，会同科学技术部、中国科学院、农业农村部、工业和信息化部、中国气象局、国家卫生健康委员会、高校等多部门和单位，集中优秀科研团队，针对京津冀及周边地区秋冬季大气重污染成因、重点行业和污染物排放管控技术、居民健康防护等开展集中攻关. 生态环境部探索“1+X”科技攻关新型举国体制机制，组建国家大气污染防治攻关联合中心. 2020年，生态环境部陆续启动系列细颗粒物(PM2.5)与臭氧(O3)复合污染协同防控科技攻关先导项目和城市二期“一市一策”驻点跟踪研究，进一步推动京津冀及周边地区、汾渭平原等区域空气质量持续改善. 本专题将展示2017年以来大气攻关系列项目取得的研究成果，本期内容涉及大气环境监测体系、O3前体物减排路径、区域和城市PM2.5与O3污染特征分析等研究内容. 专题相关研究成果可为推动我国PM2.5与O3复合污染协同防控相关领域研究提供参考.
VOCs Monitoring System Status and Development Direction in Key Regions of China
-
摘要: 科学开展大气挥发性有机物(VOCs)的监测是臭氧(O3)与细颗粒物(PM2.5)复合污染成因机制和防控的关键基础，对持续改善我国空气质量具有重要意义. 为优化提升我国VOCs监测体系和效能，提出未来光化学监测发展方向和路径，通过调研、数据挖掘总结评估了国内外VOCs监测体系设计、监测布点、监测项目和时段、监测技术和质控技术等监测要素，结果表明：①我国初步建成了覆盖重点区域的光化学监测网，但监测点位功能相对单一，缺乏区域、输送、排放高值区等关键点位，其优化和完善是提升我国VOCs监测效能的重要途径. ②5—9月是我国O3污染的重要时段，影响O3的重要组分则主要为美国环境保护局(US EPA)光化学评估监测站(Photochemical Assessment Monitoring Stations, PAMS)所涉及的组分以及醛酮类组分，其中乙烯、苯系物、甲醛、乙醛等尤为关键，并应关注部分支链烯烃和α-蒎烯、β-蒎烯等天然源烯烃对O3或颗粒物的影响，最终需结合本地化特点优化监测项目. ③我国VOCs监测技术体系中手工监测和自动监测各具优势，未来发展趋势以自动监测为主、手工监测为辅，监测技术体系应向高精准度化、标准化、小型化、模块化、智能化，以及高时间分辨率和低成本等方向发展；同时持续进行质量体系标准研究，补足空白，提升监测数据质量. 研究显示，我国环境大气VOCs监测应优化监测布点，加强监测技术体系和质量体系标准化，并聚焦重点时段形成我国本地化监测项目，从而科学地优化和完善我国光化学监测体系.
-
关键词:
- 挥发性有机物(VOCs) /
- 监测网络 /
- 监测技术 /
- 优化
Abstract: Scientific monitoring of volatile organic compounds (VOCs) in the atmosphere is the key basis for the formation mechanism and prevention and control of the combined pollution of O3 and PM2.5. It is of great significance to continuously improve the air quality in China. In order to optimize and improve the VOCs monitoring system and efficiency in China and put forward the development direction and path of photochemical monitoring in the future, the key elements of VOCs monitoring system design, monitoring sites, monitoring items and periods, monitoring technology and quality control technology at home and abroad are evaluated through research, data mining and other methods. This research is carried out from the development history, monitoring points, monitoring items and time periods, monitoring technology and quality of VOCs monitoring at home and abroad. The results show that: (1) China has initially established photochemical monitoring network covering key areas, but in the VOCs monitoring network, key points such as regions, transportation and high emission areas are lacking. It is important to optimize and improve the performance of VOCs monitoring network in China. (2) May to September is an important period of O3 pollution in China. The components involved in Photochemical Assessment Monitoring Stations (PAMS) under the US Environmental Protection Agency (US EPA) aldehydes and ketones are important components affecting O3, especially ethylene, benzene series, formaldehyde and acetaldehyde. And the impact of some branched chain olefins and natural source olefins such as α-pinene, and β-pinene on O3 or particulate matters is also noteworthy. Finally, the monitoring project should be optimized according to the localization characteristics. (3) In terms of monitoring technology, manual monitoring and automatic monitoring have their own advantages, showing the development trend of automatic monitoring as the main and manual monitoring as the auxiliary. The monitoring technology system should be developed in the direction of high precision, standardization, miniaturization, modularization, intelligence, high time resolution and low monitoring cost. At the same time, quality system standard research should be continued to fill in the gaps and improve the quality of monitoring data. The research shows the monitoring points of atmospheric VOCs in China should be optimized, the standardization of monitoring technology system and quality system should be strengthened, and the localized monitoring projects in China should be formed focusing on key periods, so as to scientifically optimize and improve the photochemical monitoring program in China. -
图 1 2019—2020年我国116个重点城市中对体积分数、LOH、OFP和AFP贡献较大的PAMS组分
Figure 1. Key components of volume fraction, LOH, OFP and AFP of PAMS in 116 major cities from 2019 to 2020
图 2 PAMS组分、PAMS+TO15组分中大气污染综合效应较高的组分
Figure 2. The key components with high comprehensive effect in PAMS component and PAMS+TO15 component
图 3 2019—2020年我国116个重点城市中对体积分数、LOH、和OFP贡献较大的醛酮类组分
Figure 3. The key components with high volume fraction, LOH and OFP of aldehydes and ketones in 116 Chinese key cities from 2019 to 2020
图 4 2020年9月北京、上海VOCs、NOx和O3浓度的时间变化
Figure 4. The time changes of VOCs, NOx and O3 concentrations in Beijing and Shanghai in September of 2020
表 1 2018—2021年我国开展VOCs、NMHC监测的城市数量
Table 1. The number of VOCs and NMHC monitored cities in China from 2018 to 2021
年份 开展VOCs监测的城市个数 开展NMHC监测的城市个数 2018 81 79 2019 119 176 2020 155 252 2021 165 270 
下载: 导出CSV
表 2 我国VOCs监测点位类型
Table 2. Type of VOCs monitoring points in China
VOCs监测点位类型 自动点位个数 手工点位个数 人口密集区内的O3浓度高值区 122 92 O3高浓度点 9 17 VOCs高浓度点 2 12 区域点 4 16 地区影响边缘监测点(下风向点位) 15 20 城市上风向点 6 28 背景点 9 3 其他 9 8 合计 176 196
下载: 导出CSV
表 3 2017—2020年我国重点区域O3超标天数
Table 3. Total number of days of O3 exceeding the standard in key regions of China from 2017 to 2020
区域 超标天数(城市超标天之和)/d 4年城市平均超标天数/d 重点超标时段的超标天数/d 超标极值月份的超标天数/d 2017年 2018年 2019年 2020年 京津冀及周边地区 1 479 1 688 2 251 1 727 64 1 241(5—7月) 585(6月) 汾渭平原 510 441 569 426 44 386(6—8月) 158(6月) 苏皖鲁豫交界区域 767 836 1 387 865 44 671(5—6月、9月) 355(6月) 珠三角及周边地区 228 252 452 216 32 194(8—10月) 83(9月) 长三角地区 1 135 1 164 1 713 1 126 31 827(5—7月) 373(6月) 成渝地区 212 270 313 325 18 174(4月、7—8月) 78(8月)
下载: 导出CSV
表 4 VOCs手工及自动监测技术特点比较
Table 4. Comparison of VOCs manual and automatic monitoring techniques
对比指标 手工监测技术 自动监测技术 应用基础 20~30年技术积累，标准规范配套齐全 5~10年的应用基础，仅有方法标准 监测组分 可满足国家规划的116项组分 57种PAMS组分监测能力，部分GC-MS可监测116项组分 稳定性 实验室环境和仪器稳定性均较强 GC-FID较稳定，GC-MS稳定性欠缺，易受站点内外环境影响 检出限 绝大多数组分检出限在0.1×10−9以下 90%以上组分检出限在0.1×10−9以下 准确性 准确性好，质控可控 准确性好，质控可控 前处理 三级冷阱，除水性能好 一级冷阱，除水性能不足，易偏差 布点要求 可定制，空间灵活布点 布点要求高，选定后更换难度大 数据回溯核实 可重复分析、回溯分析 一次性分析，无法回溯 采样代表性 涵盖采样、运输、稀释、分析等技术环节，易组分流失，采样代表性不足 原位连续采样分析，样品仅需要通过采样总管，原位采样，样品损失小，采样代表性强 数据时间分辨率 数据时间分辨率较低， 周期长，从采样时刻到数据输出，整体需24 h 数据时间分辨率较高，具备小时或小时以下数据时间分辨率 人员要求 需采样人员、运输人员、分析人员，对人员要求较高 人员需求少，仅需仪器运维人员 质控要求 质控环节多. 涉及采样罐质控、现场采样质控、运输质控、平行样质控等外部质控和仪器质控 仅需仪器质控，但质控难度较大 运维成本 环节多、人员多、成本高 人力物力投入相对较少
下载: 导出CSV
-
[1] 孟晓艳.2020年全国生态环境质量简况[R].北京:中国环境监测总站,2021. [2] 李红,彭良,毕方,等.我国PM2.5与臭氧污染协同控制策略研究[J].环境科学研究,2019,32(10):1763-1778.LI H,PENG L,BI F,et al.Strategy of coordinated control of PM2.5 and ozone in China[J].Research of Environmental Sciences,2019,32(10):1763-1778. [3] 王韵杰,张少君,郝吉明.中国大气污染治理:进展·挑战·路径[J].环境科学研究,2019,32(10):1755-1762.WANG Y J,ZHANG S J,HAO J M.Air pollution control in China:progress,challenges and future pathways[J].Research of Environmental Sciences,2019,32(10):1755-1762. [4] United States Environment Protection Agency.SPECIATE 4.5.2009[EB/OL].Washington DC:US Environmental Protection Agency,(2020-03-03)[2022-10-05].https://www.epa.gov/airemissions-modeling/speciate. [5] 杨一鸣,崔积山,童莉,等.美国VOCs定义演变历程对我国VOCs环境管控的启示[J].环境科学研究,2017,30(3):368-379. doi: 10.13198/j.issn.1001-6929.2017.01.52YANG Y M,CUI J S,TONG L,et al.Evolution of the definition of volatile organic compounds in the United States and its implications for China[J].Research of Environmental Sciences,2017,30(3):368-379. doi: 10.13198/j.issn.1001-6929.2017.01.52 [6] 曹娟,毋振海,鲍捷萌,等.美国人为源VOCs管控经验及其对我国的启示[J].环境科学研究,2022,35(3):633-649. doi: 10.13198/j.issn.1001-6929.2022.01.04CAO J,WU Z H,BAO J M,et al.Processes and experience of anthropogenic VOCs management and control in the USA and enlightenment to China[J].Research of Environmental Sciences,2022,35(3):633-649. doi: 10.13198/j.issn.1001-6929.2022.01.04 [7] United States Environment Protection Agency.Community scale air toxics ambient monitoring[EB/OL].Washington DC:US Environmental Protection Agency,(2023-02-10)[2022-10-05].https://www.epa.gov/amtic/community-scale-air-toxics-ambient-monitoring-csatam-final-reports. [8] United States Environment Protection Agency.PAMS re-engineering[EB/OL].Washington DC:US Environmental Protection Agency,(2020-11-30)[2022-10-05].https://www.epa.gov/ttn/amtic/PAMSreeng.html. [9] United States Environment Protection Agency.Ncore network[EB/OL].Washington DC:US Environmental Protection Agency,(2022-11-30)[2022-10-05].https://www.epa.gov/ttn/amtic/ncore.html. [10] United States Environment Protection Agency.PAMS net[EB/OL].Washington DC:US Environmental Protection Agency,(2022-11-30)[2022-10-05].https://www.epa.gov/ttn/amtic/images/PAMSnet.gif [11] United States Environment Protection Agency.PAMS target list (54)[EB/OL].Washington DC:US Environmental Protection Agency,(2022-11-30)[2022-10-05].https://www.epa.gov/sites/production/files/2019-11/documents/PAMS54.pdf. [12] United States Environment Protection Agency.PAMS target list (64) [EB/OL].Washington DC:US Environmental Protection Agency,(2019-11-30)[2022-10-05].https://www.epa.gov/sites/production/files/2019-11/documents/targetlist 0.pdf. [13] United States Environment Protection Agency.VOCs exemption policy[EB/OL].Washington DC:US Environmental Protection Agency,(2022-09-16)[2022-10-05].https://www.epa.gov/ground-level-ozone pollution/volatile-organic-compound-exemptions. [14] United States Environment Protection Agency.Ozone-trends[EB/OL].Washington DC:US Environmental Protection Agency,(2022-08-01)[2022-10-05].https://www.epa.gov/air-trends/ozone-trends. [15] United States Environment Protection Agency.Overview of PAMS[EB/OL].Washington DC:US Environmental Protection Agency,(2016-10-30)[2022-10-05].https://www.epa.gov/sites/production/files/2016-10/documents/overview_of_PAMS.pdf. [16] Bo Richter Larsen.Measurement of ozone precursor volatile organic compounds (VOCs)[EB/OL].Strasbourg:Research Gate,(2004-03-31)[2022-10-05].https://www.researchgate.net/publication/236971339_Measurement_of_Ozone_Precursor_Volatile_Organic_Compounds_VOCs_Proceedings_of_the_International_Expert_meeting_6-7_March_2003_Casa_Don_Guanella_Barza_Ispra_Italy [17] UK AIR.Automatic hydrocarbon network [EB/OL].London:Department for Environment Food & Rural Affairs,(2023-03-08)[2022-10-05].https://uk-air.defra.gov.uk/networks/network-info?view=hc#startcontent. [18] 環境省.大気汚染に係る環境基準[EB/OL].东京:環境省,2014[2022-10-05].http://www.env.go.jp/kijun/taiki.html. [19] 環境省.今後の光化学オキシダント対策に向けた検討スケジュール[EB/OL].东京:環境省,(2014-08-13)[2022-10-05].www.env.go.jp/council/07air-noise/y078-10a/mat1003.pdf. [20] 姜华,常宏咪.我国臭氧污染形势分析及成因初探[J].环境科学研究,2021,34(7):1576-1582. doi: 10.13198/j.issn.1001-6929.2021.05.20JIANG H,CHANG H M.Analysis of China's ozone pollution situation,preliminary investigation of causes and prevention and control recommendations[J].Research of Environmental Sciences,2021,34(7):1576-1582. doi: 10.13198/j.issn.1001-6929.2021.05.20 [21] 钟流举.区域空气质量监测网络系统的设计与实现[M].广州:广东科技出版社,2012. [22] 孙新丽,杜世勇,王书肖,等.大气污染防治综合决策支持技术平台典型城市应用研究[J].环境科学研究,2021,34(1):158-171. doi: 10.13198/j.issn.1001-6929.2020.12.08SUN X L,DU S Y,WANG S X,et al.Application and research of decision support technology platform for air pollution prevention and control in typical polluted city[J].Research of Environmental Sciences,2021,34(1):158-171. doi: 10.13198/j.issn.1001-6929.2020.12.08 [23] HAYES P L,CARLTON A G,BAKER K R,et al.Modeling the formation and aging of secondary organic aerosols in Los Angeles during CalNex 2010[J].Atmospheric Chemistry and Physics,2015,15(10):5773-5801. doi: 10.5194/acp-15-5773-2015 [24] 吴亚君,胡君,张鹤丰,等.兰州市典型企业VOCs排放特征及反应活性分析[J].环境科学研究,2019,32(5):802-812. doi: 10.13198/j.issn.1001-6929.2019.02.09WU Y J,HU J,ZHANG H F,et al.Characteristics and chemical reactivity of fugitive volatile organic compounds from typical industries in Lanzhou City[J].Research of Environmental Sciences,2019,32(5):802-812. doi: 10.13198/j.issn.1001-6929.2019.02.09 [25] MA P K,ZHAO Y L,ROBINSON A L,et al.Evaluating the impact of new observational constraints on P-S/IVOC emissions,multi-generation oxidation,and chamber wall losses on SOA modeling for Los Angeles,CA[J].Atmospheric Chemistry and Physics,2017,17(15):9237-9259. doi: 10.5194/acp-17-9237-2017 [26] ROBINSON A L,DONAHUE N M,SHRIVASTAVA M K,et al.Rethinking organic aerosols:semivolatile emissions and photochemical aging[J].Science,2007,315(5816):1259-1262. doi: 10.1126/science.1133061 [27] XUAN Z Q,BI C L,LI J F,et al.Source contributions to total concentrations and carcinogenic potencies of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in ambient air:a case study in Suzhou City,China[J].Environmental Science and Pollution Research,2017,24(30):23966-23976. doi: 10.1007/s11356-017-0050-y [28] LIU Y,SHAO M,FU L L,et al.Source profiles of volatile organic compounds (VOCs) measured in China:part Ⅰ[J].Atmospheric Environment,2008,42(25):6247-6260. doi: 10.1016/j.atmosenv.2008.01.070 [29] LIU Y,SHAO M,LU S H,et al.Volatile organic compound (VOC) measurements in the Pearl River Delta (PRD) Region,China[J].Atmospheric Chemistry and Physics,2008,8(6):1531-1545. doi: 10.5194/acp-8-1531-2008 [30] LI Y J,REN B N,QIAO Z,et al.Characteristics of atmospheric intermediate volatility organic compounds (IVOCs) in winter and summer under different air pollution levels[J].Atmospheric Environment,2019,210:58-65. doi: 10.1016/j.atmosenv.2019.04.041 -
点击查看大图
图(4) / 表(4)
计量
- 文章访问数: 358
- HTML全文浏览量: 45
- PDF下载量: 199
- 被引次数: 0
