引用本文:邓思欣,司徒淑娉,周雪玲,安丽娜,邝敏儿,谢敏.2017年佛山市大气复合污染特征及来源分析[J].环境监控与预警,2021,13(6):43-50
DENG Si-xin, SITU Shu-ping, ZHOU Xue-ling, AN Li-na, KUANG Min-er, XIE Min.Characteristics and Source Analysis of Composite Air Pollution in Foshan City in 2017[J].Environmental Monitoring and Forewarning,2021,13(6):43-50
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2017年佛山市大气复合污染特征及来源分析
邓思欣,司徒淑娉,周雪玲,安丽娜,邝敏儿,谢敏1,2
1.广东省佛山生态环境监测站,广东 佛山 528000;2.广东省环境监测中心,国家环境保护区域空气质量监测重点实验室,广东 广州 510308
摘要:
利用2017年佛山市8个国控监测点位的6项常规大气污染物自动监测数据,研究细颗粒物(PM2.5)、可吸入颗粒物(PM10)、臭氧(O3)的时空变化和复合污染特征,并采用单颗粒气溶胶质谱仪对佛山市大气PM2.5进行来源解析,分析O3与二次气溶胶的协同增长关系。结果表明,2017年佛山市空气质量综合指数(AQI)为4.75,主要的空气质量污染物为PM2.5、二氧化氮(NO2)和O3,除O3呈现第2,3季度较高外,其他5项污染物均呈现第1,4季度较高的趋势。ρ(PM2.5)和ρ(PM2.5)/ρ(CO)在1—4月和11,12月较高,二次生成强度较大。机动车尾气源、燃煤源和工业工艺源是大气PM2.5的主要来源。佛山市中心城区等道路密集以及交通枢纽地区的ρ(NO2)较高,机动车尾气排放是大气NO2的主要来源。O3污染主要发生在4,5,7—10月。ρ(O3)和ρ(PM2.5)/ρ(CO)的日变化均在12:00—17:00达到峰值。ρ(PM2.5)随光化学活性水平增强而提高,高度和中度光化学活性水平下ρ(PM2.5)/ρ(CO)明显大于轻度和低光化学活性水平。在统计时段,PM2.5和O3协同增长的时间占37.3%,O3污染对二次气溶胶的氧化生成有明显的促进作用。
关键词:  细颗粒物  二氧化氮  臭氧  复合污染  在线源解析
DOI:
分类号:X823
基金项目:国家环境保护区域空气质量监测重点实验室开放基金资助项目(SRAQM01202001,SRAQM02202001);佛山市科技创新基金资助项目(2016AB000261, 2020001004318)
Characteristics and Source Analysis of Composite Air Pollution in Foshan City in 2017
DENG Si-xin, SITU Shu-ping, ZHOU Xue-ling, AN Li-na, KUANG Min-er, XIE Min1,2
1.Guangdong Foshan Environmental Monitoring Center, Foshan, Guangdong 528000, China;2. State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangdong Provincial Environmental Monitoring Center, Guangzhou, Guangdong 510308, China
Abstract:
Using automatic monitoring data of the national monitoring network of 6 conventional atmospheric pollutants in Foshan in 2017, the spatial and temporal variation and combined pollution characteristics of PM2.5,PM10and O3 were studied. Moreover on line source apportionment of PM2.5 in Foshan was carried out using a single particle aerosol mass spectrometer. The synergistic relationship between O3 and secondary aerosols was analyzed.The results demonstrated that the comprehensive air quality index (AQI) of Foshan in 2017 was 4.75. PM2.5, NO2and O3 were primary pollutants. Except the concentration of O3 was higher in the second and third quarters, the other 5 pollutants showed a higher trend in the first and the last quarters. The concentration of ρ(PM2.5 and ρ(PM2.5)/ρ(CO) was higher in January to April and November to December, and the concentration of secondary PM2.5 was higher. Vehicle, coal burning and industrial process were the primary sources of PM2.5. The concentration of NO2 was highest in the areas with dense roads and transportation hubs in the central district of Foshan. Vehicle was the main source of NO2. O3 pollution occurred most frequently in April, May and July to October. ρ(O3)and ρ(PM2.5)/ρ(CO) reached a peak around 12:00 to 17:00. With the enhancement of photochemical activity, concentrations of ρ(PM2.5) increased. The ratio of ρ(PM2.5)/ρ(CO) at high and moderate photochemical activity was significantly greater than that at a mild and low photochemical activity.The synergistic growth period of PM2.5 and O3 accounted for 37.3% in the statistical period, and the synergistic growth effects of O3 on secondary aerosol formation were significant.
Key words:  PM2.5  NO2  O3  Composite pollution  On line source apportionment