气候变化领域集成服务门户(CCPortal): Formation mechanism of HCHO pollution in the suburban Yangtze River Delta region, China: A box model study and policy implementations

CCPortal

DOI	10.1016/j.atmosenv.2021.118755
	Formation mechanism of HCHO pollution in the suburban Yangtze River Delta region, China: A box model study and policy implementations
	Zhang K.; Duan Y.; Huo J.; Huang L.; Wang Y.; Fu Q.; Wang Y.; Li L.
发表日期	2021
ISSN	1352-2310
卷号	267
英文摘要	High levels of formaldehyde (HCHO) have been frequently detected during spring-summertime in the densely populated and rapidly developing Yangtze River Delta (YRD) region, China. However, the detailed formation mechanism of HCHO pollution remains unclear. Based on a comprehensive field campaign conducted at Dianshan Lake (DSL) station, a supersite located in the suburban YRD region, the influence of VOCs on HCHO formation, as well as the role of HCHO in the ROx radical recycling was analyzed. Results indicate that the maximum atmospheric oxidation capability (AOC) during HCHO pollution episodes varies from 0.65 × 108 to 1.29 × 108 molecules cm−3 s−1, and high AOC value favors the secondary formation of HCHO. Meanwhile, the photolysis of HCHO accounts for 21.2% of the primary ROx, suggesting the significant role of HCHO in ROx recycling. Isoprene was identified to be a key precursor of HCHO, and the RO from isoprene contributed ∼15% to the total daytime HCHO production rate (PHCHO). Sensitivity analysis reveal that when isoprene, xylene or ethylene was cut off, the simulated HCHO concentration could be reduced by 50%, 15%, or 13%, respectively. Based on the isopleth of HCHO under different VOCs/NOx reduction ratios, we found that the VOCs/NOx reduction ratio should be above 1.03 to mitigate the HCHO pollution. Reactive VOCs (such as isoprene, xylene and alkenes) should be reduced to suppress HCHO pollution in the YRD region. © 2021
关键词	Atmospheric oxidation capability Box model Formaldehyde Photochemical reactions
语种	英语
scopus关键词	Ethylene; Isoprene; Photolysis; River pollution; Rivers; Sensitivity analysis; Atmospheric oxidation; Atmospheric oxidation capability; Box models; Field campaign; Formation mechanism; Modelling studies; NO x reduction; Policy implementations; Reduction ratios; Yangtze river delta; Formaldehyde; 2,3 butanedione; acetone; ammonia; benzene; ethylbenzene; ethylene; formaldehyde; isoprene; propylene; radical; toluene; volatile organic compound; xylene; ethylene; formaldehyde; formation mechanism; oxidation; photolysis; suburban area; volatile organic compound; xylene; air pollution; air temperature; Article; atmospheric pressure; boundary layer; China; circadian rhythm; concentration (parameter); controlled study; dry deposition; environmental policy; field experiment; lake; limit of detection; meteorology; observational study; oxidation; photochemistry; photolysis; relative humidity; river; sensitivity analysis; suburban area; time series analysis; China; Lake Dianshan; Yangtze River
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/248196
作者单位	School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China; Key Laboratory of Organic Compound Pollution Control Engineering, Shanghai University, Shanghai, 200444, China; Shanghai Environmental Monitoring Center, Shanghai, 200235, China; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States
推荐引用方式 GB/T 7714	Zhang K.,Duan Y.,Huo J.,et al. Formation mechanism of HCHO pollution in the suburban Yangtze River Delta region, China: A box model study and policy implementations[J],2021,267.
APA	Zhang K..,Duan Y..,Huo J..,Huang L..,Wang Y..,...&Li L..(2021).Formation mechanism of HCHO pollution in the suburban Yangtze River Delta region, China: A box model study and policy implementations.ATMOSPHERIC ENVIRONMENT,267.
MLA	Zhang K.,et al."Formation mechanism of HCHO pollution in the suburban Yangtze River Delta region, China: A box model study and policy implementations".ATMOSPHERIC ENVIRONMENT 267(2021).