气候变化领域集成服务门户(CCPortal): Insights into sources and atmospheric processing at two polluted urban locations in the Indo-Gangetic plains from stable carbon and nitrogen isotope ratios and polycyclic aromatic hydrocarbons in ambient PM2.5

CCPortal

DOI	10.1016/j.atmosenv.2021.118904
	Insights into sources and atmospheric processing at two polluted urban locations in the Indo-Gangetic plains from stable carbon and nitrogen isotope ratios and polycyclic aromatic hydrocarbons in ambient PM2.5
	Singh G.K.; Rajeev P.; Paul D.; Gupta T.
发表日期	2022
ISSN	1352-2310
卷号	271
英文摘要	Ambient PM2.5 samples collected from two heavily polluted locations (Kanpur and Prayagraj) in Indo-Gangetic plains during wintertime were analyzed for stable isotopes (ẟ13C and ẟ15N), polycyclic aromatic hydrocarbons (PAHs), carbonaceous components, and ionic species. These data helped in understanding the aerosol composition, emission sources, and the associated atmospheric chemistry. Major contribution of high molecular weight (HMW) PAHs (4-ring, 5-ring, and 6-ring) to the total PAHs was observed at both the sampling sites. Organic carbon (OC) was a significant component of carbonaceous aerosols at both locations. In addition, OC/EC ratio (>2) revealed a dominant contribution from secondary organic carbon (SOC) during the sampling campaign. The contribution of SOC to total OC was much higher in Kanpur than in Prayagraj. A strong correlation between K+BB and OC observed for the two sites indicates a major influence of biomass burning. ẟ13C values of bulk PM2.5 samples at Prayagraj were slightly lower compared to Kanpur. ẟ13C and PAH isomeric ratios indicate significant contributions from biomass burning and petroleum combustion at both locations. Enhanced SOC formation appeared to control the ẟ13C at the Kanpur location, which may be due to the formation of secondary organic aerosol (SOA; 13C-depleted) from volatile organic compounds (VOCs) derived from combustion-generated aerosols (biomass/fossil fuel). This study also reports the ambient ẟ15N of aerosols at the Prayagraj site. The correlation of ẟ15N with nitrogenous components WSON, NH4+_N, and NO3−_N suggest 15N-depleted sources at the Prayagraj site. Like Kanpur, WSON and NH4+_N also influenced the bulk ẟ15N values of Prayagraj aerosols. © 2021 Elsevier Ltd
关键词	Isomeric ratios PAHs Particulate matter Source identification Stable isotope
语种	英语
scopus关键词	Aerosols; Biomass; Combustion; Isotopes; Location; Nitrogen; Organic carbon; Particles (particulate matter); Volatile organic compounds; Ambients; Biomass-burning; Indo-Gangetic Plains; Isomeric ratios; NH 4 + N; Particulate Matter; PM 2.5; Secondary organic carbon; Sources identifications; Stable isotopes; Polycyclic aromatic hydrocarbons; ammonia; ammonium nitrate; ammonium sulfate; carbon 13; chloride; fossil fuel; nitrate; nitrogen; nitrogen 15; organic carbon; petroleum; polycyclic aromatic hydrocarbon; potassium ion; volatile organic compound; ambient air; atmospheric pollution; biomass burning; carbon isotope; isotopic ratio; nitrogen isotope; PAH; particulate matter; pollutant source; source identification; urban pollution; aerosol; air monitoring; air sampling; ambient air; Article; atmospheric diffusion; biomass production; boundary layer; chemical structure; combustion; environmental temperature; geographic distribution; molecular weight; particulate matter 2.5; pollution transport; relative humidity; secondary organic aerosol; time factor; total organic carbon; urban area; winter; Gangetic Plain; India; Kanpur; Uttar Pradesh
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248093
作者单位	Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, 208 016, India; Department of Earth Sciences, Indian Institute of Technology Kanpur, Kanpur, 208 016, India; APTL at Center for Environmental Science and Engineering (CESE), Indian Institute of Technology Kanpur, Kanpur, 208 016, India
推荐引用方式 GB/T 7714	Singh G.K.,Rajeev P.,Paul D.,et al. Insights into sources and atmospheric processing at two polluted urban locations in the Indo-Gangetic plains from stable carbon and nitrogen isotope ratios and polycyclic aromatic hydrocarbons in ambient PM2.5[J],2022,271.
APA	Singh G.K.,Rajeev P.,Paul D.,&Gupta T..(2022).Insights into sources and atmospheric processing at two polluted urban locations in the Indo-Gangetic plains from stable carbon and nitrogen isotope ratios and polycyclic aromatic hydrocarbons in ambient PM2.5.ATMOSPHERIC ENVIRONMENT,271.
MLA	Singh G.K.,et al."Insights into sources and atmospheric processing at two polluted urban locations in the Indo-Gangetic plains from stable carbon and nitrogen isotope ratios and polycyclic aromatic hydrocarbons in ambient PM2.5".ATMOSPHERIC ENVIRONMENT 271(2022).