摘要
对2017年11月1日—2018年1月31日与2018年11月1日—2019年1月31日连续两年青岛市大气PM1进行监测,获取了PM1中含碳组分的变化趋势,结合国控站点监测数据和气象条件,分析了秋冬季PM1来源.结果表明:2017、2018年秋冬季观测期间PM1日均质量浓度分别为40.58±25.98、42.55±25.05μg/m^3;霾日质量浓度分别为84.71±16.70、81.52±18.39μg/m^3.与2017年相比,2018年同期PM1质量浓度增长4.85%,霾日下降3.76%.2017年霾日PM1中OC、EC质量浓度分别为13.67±3.95、3.95±1.02μg/m^3,2018年分别为16.48±6.34、3.34±1.16μg/m^3.与2017年相比,2018年霾日OC质量浓度增长20.56%,EC下降15.44%.2017、2018年霾日SOC质量浓度分别是非霾日的1.28和2.15倍,表明霾污染发生时易发生有机碳二次转化.含碳组分主成分分析均解析出3个因子.因子1解释变量均最大,分别为58.98%、67.14%,其表征含碳组分主要源于生物质燃烧、燃煤、道路扬尘及汽油车尾气等排放源.由后向气流轨迹分析得出,2017、2018年秋冬季气团轨迹多起源于内蒙古,经河北、天津、山东等省市抵达青岛.
The ambient PM1 levels during late autumn and winter season in Qingdao were monitored for two consecutive years(November 1st to next January 31st of 2017 and 2018).The carbon components of PM1,and other atmospheric pollutants of PM10,PM2.5,SO 2,and NO 2,as well as correlated meteorological conditions,were used to trace the sources of ambient PM1 in Qingdao.The results showed that the average daily concentrations of PM1 were 40.58±25.98μg/m^3 and 42.55±25.05μg/m^3 for the two observation periods,which increased to 84.71±16.70μg/m^3 and 81.52±18.39μg/m^3 during haze episodes.The mass concentrations of OC and EC in PM1 in haze days were 13.67±3.95μg/m^3(16.48±6.34μg/m^3),3.95±1.02μg/m^3(3.34±1.16μg/m^3)for year 2017(2018),respectively.While the SOC mass concentrations in haze days were 1.28 and 2.15 times of those in non-haze days for year of 2017 and 2018,suggesting the strong potential of secondary transformation of organic carbon during haze episodes.Three factors were apportioned through principal component analysis of carbon-containing components.Factor 1 has the largest explanatory variables,which were 58.98%and 67.14%for 2017 and 2018,indicating the carbon-containing components of PM1 were mainly from sources of biomass combustion,coal burning,road dust,and gasoline vehicle exhaust.The backward airflow trajectory analysis showed that the air masses were mostly originated in Inner Mongolia and passed through Hebei,Tianjin,or other cities of Shandong and finally arrived at Qingdao.
作者
刘子杨
张宜升
彭倩倩
王新雨
薛莲
王娇
刘晓环
王征
LIU Ziyang;ZHANG Yisheng;PENG Qianqian;WANG Xinyu;XUE Lian;WANG Jiao;LIU Xiaohuan;WANG Zheng(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266033;Qingdao Municipal Bureau of Ecology and Environment,Qingdao 266003;Key Laboratory of Marine Environmental and Ecology,Ministry of Education,Ocean University of China,Qingdao 266100)
出处
《南京信息工程大学学报(自然科学版)》
CAS
2020年第6期676-685,共10页
Journal of Nanjing University of Information Science & Technology(Natural Science Edition)
基金
国家自然科学基金(41405114)
山东省环境科学与工程一流学科开放课题(QUTSEME201911)。
关键词
PM1
含碳组分
来源解析
青岛
PM1
carbonaceous component
source apportionment
Qingdao