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DOI	10.5194/acp-22-2689-2022
	Evaluation of the daytime tropospheric loss of 2-methylbutanal
	Asensio, Maria; Antinolo, Maria; Blazquez, Sergio; Albaladejo, Jose; Jimenez, Elena
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	2689
结束页码	2701
卷号	22 期号:4 页码:13
英文摘要	Saturated aldehydes, e.g. 2-methylbutanal (2MB, CH3CH2CH(CH3)C(O)H), are emitted into the atmosphere by several biogenic sources. The first step in the daytime atmospheric degradation of 2MB involves gas-phase reactions initiated by hydroxyl (OH) radicals, chlorine (Cl) atoms, and/or sunlight. In this work, we report the rate coefficients for the gas-phase reaction of 2MB with OH (k(OH)) and Cl (k(Cl)), together with the photolysis rate coefficient (J), in the ultraviolet solar actinic region in Valencia (Spain) at different times of the day. The temperature dependence of k(OH) was described in the 263-353 K range by the following Arrhenius expression: k(OH)(T) = (8.88 +/- 0.41) x 10(-12) exp[(331 +/- 14)/1] cm(3) molec.(-1) s(-1). At 298 K, the reported k(OH) and k(Cl )are (2.68 +/- 0.07) x 10(-11) and (2.16 +/- 0.32) x 10(-10) cm(3) molec.(-1) s(-1), respectively. Identification and quantification of the gaseous products of the Cl reaction and those from the photodissociation of 2 MB were carried out in a smog chamber by different techniques (Fourier transform infrared spectroscopy, proton transfer time-of-flight mass spectrometry, and gas chromatography coupled to mass spectrometry). The formation and size distribution of secondary organic aerosols formed in the Cl reaction were monitored by a fast mobility particle sizer spectrometer. A discussion on the relative importance of the first step in the daytime atmospheric degradation of 2MB is presented together with the impact of the degradation products in marine atmospheres.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000765668100001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273305
作者单位	Universidad de Castilla-La Mancha; Universidad de Castilla-La Mancha; Universidad de Castilla-La Mancha
推荐引用方式 GB/T 7714	Asensio, Maria,Antinolo, Maria,Blazquez, Sergio,et al. Evaluation of the daytime tropospheric loss of 2-methylbutanal[J],2022,22(4):13.
APA	Asensio, Maria,Antinolo, Maria,Blazquez, Sergio,Albaladejo, Jose,&Jimenez, Elena.(2022).Evaluation of the daytime tropospheric loss of 2-methylbutanal.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(4),13.
MLA	Asensio, Maria,et al."Evaluation of the daytime tropospheric loss of 2-methylbutanal".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.4(2022):13.