典型文献
Atmospheric carbonyls in a heavy ozone pollution episode at a metropolis in Southwest China:Characteristics,health risk assessment,sources analysis
文献摘要：
Ambient carbonyls were continuously observed in the field during a heavy ozone pollution episode in Chengdu,China from August 4 to August 19,2019,and the pollution character-istics,atmospheric photochemical reactivity,human health risk,and sources of carbonyls were analyzed.Fifteen carbonyls were quantified with average total mixing ratios of 20.38 ppbv Formaldehyde (9.86 ppbv),acetone (4.41 ppbv),and acetaldehyde (3.57 ppbv) were the three most abundant carbonyls.During the heavy ozone pollution episode,the concentra-tion of carbonyls was found to be higher on pollution days than on the clean days,and rela-tively higher in the daytime,especially at noon on the pollution days.This was influenced by the intensity of photochemical reactions and precipitation.The "weekend effect" with the concentration of carbonyls was higher on the weekends than on the weekdays was pointed out.Formaldehyde,acetaldehyde and hexaldehyde were the dominant oxidative species during the observation.The carcinogenic and non-carcinogenic risk values of formaldehyde and acetaldehyde were higher on pollution days than on clean days,and these values were higher compared with those of other cities in China and abroad.Long-term exposure to these compounds should therefore be avoided.Diagnostic ratios and correlation analysis together with backward trajectory analysis showed that primary emission and secondary formation accounted 66％-76％ and 24％-34％ of carbonyls in Chengdu,respectively,with primary emission being the main sources of carbonyls,and carbonyls from the surrounding cities and emission from natural sources also had a significant contribution to the carbonyls in Chengdu.
文献关键词：
中图分类号：
作者姓名：
Jiemeng Bao;Hong Li;Zhenhai Wu;Xin Zhang;Hao Zhang;Yunfeng Li;Jun Qian;Junhui Chen;Liqun Deng
作者机构：
State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;College of Environmental Science and Engineering,Shandong University,Qingdao 266237,China;College of Mathematics,China University of Geosciences,Beijing 100083,China;Sichuan Academy of Environmental Sciences,Chengdu 610000,China
文献出处：
引用格式：
[1]Jiemeng Bao;Hong Li;Zhenhai Wu;Xin Zhang;Hao Zhang;Yunfeng Li;Jun Qian;Junhui Chen;Liqun Deng-.Atmospheric carbonyls in a heavy ozone pollution episode at a metropolis in Southwest China:Characteristics,health risk assessment,sources analysis)[J].环境科学学报（英文版）,2022(03):40-54
A类：
hexaldehyde
B类：
Atmospheric,carbonyls,heavy,ozone,pollution,episode,metropolis,Southwest,China,Characteristics,health,risk,assessment,sources,analysis,Ambient,were,continuously,observed,field,during,Chengdu,from,August,character,atmospheric,photochemical,reactivity,human,analyzed,Fifteen,quantified,average,total,mixing,ratios,ppbv,Formaldehyde,acetone,acetaldehyde,three,most,abundant,During,was,found,higher,than,clean,daytime,especially,noon,This,influenced,by,intensity,reactions,precipitation,effect,concentration,weekends,weekdays,pointed,dominant,oxidative,species,observation,carcinogenic,values,formaldehyde,these,compared,those,other,cities,abroad,Long,term,exposure,compounds,should,therefore,avoided,Diagnostic,correlation,together,backward,trajectory,showed,that,primary,emission,secondary,formation,accounted,respectively,being,main,surrounding,natural,also,had,significant,contribution
AB值：
0.45645
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