皖东北部大气挥发性有机物组分特征及来源解析

打开文本图片集

中图分类号 X511 文献标识码A 文章编号 1007-7731（2025）13-0040-07

DOI号 10.16377/j.cnki.issn1007-7731.2025.13.010

Characteristics and sources of Atmospheric volatile organic compounds in the Northeastern Anhui Province

AbstractTo investigate the compounds characteristics and sources of atmospheric VOCs in an Urban area of Northeastern Anhui （ 33∘18′-34∘38′ E， 116∘09′-118∘10′N ）， the continuous monitoring data of atmospheric VOCs in the urban area from January to December 2O23 wereused toanalyze the chemical compositionand characteristicsof VOCs，and the source apportionment of VOCs was carried out by using the ratio method and the positive matrix factorization method （PMF）.Theresults showed that theaverage volume concentration of atmospheric VOCs inthis area in 2023 was 33.3×10-9 ，and alkanes and OVOCs were the components with the highest proportion in VOCs，and the monthlyaverageconcentrationof VOCs showedthecharacteristicsof“low summerand highin winter”，andthehighest concentration was2.9 times thatof the lowest level.The annual average valueof OFPofatmospheric VOCsin this region was 183.5μg/m3 ，and OVOC and alkenes were the top two components contributing to OFP，accounting for 44.8% and （2号 34.3% respectively.34 species in the atmospheric VOCs of this region had contributed tothe production of secondary organic aerosols，and the contribution of aromatic hydrocarbons 97.9% . Among them，the AFP in winter was the highest， and the top three species contributing the most were benzene，toluene and m/p- xylene，and the sum of the three accounts for 80.5% .The ratio method showed thatthe atmospheric VOCs in this area came from coal-fired sources and regional transport.ThePMFanalysisresultsshowed thatVOCsmainly came from combustion sources，industrial emission sources，solvent use，motor vehicle emission sources and oil and gas volatilization sources.Therefore，the 5 types of volatilegases including combustion sources are key monitoring sources foratmospheric VOCs in the region，provides a reference for monitoring atmospheric characteristics in related areas.

Keywordsatmospheric environment;volatile organic compounds（VOCs）；ozone formation potential （OFP）： secondary organic aerosol formation potential（AFP）

臭氧 Π（03） 是大气环境中的污染物之一，主要来源于挥发性有机物（VOCs）与氮氧化物 （NOx） 之间复杂的光化学反应。（剩余9562字）