气候变化领域集成服务门户(CCPortal): Measurement report: Indirect evidence for the controlling influence of acidity on the speciation of iodine in Atlantic aerosols

CCPortal

DOI	10.5194/acp-21-13067-2021
	Measurement report: Indirect evidence for the controlling influence of acidity on the speciation of iodine in Atlantic aerosols
	Baker A.R.; Yodle C.
发表日期	2021
ISSN	1680-7316
起始页码	13067
结束页码	13076
卷号	21 期号:17
英文摘要	The speciation of soluble iodine and major-ion composition were determined in size-fractionated aerosols collected during the AMT21 cruise between Avonmouth, UK, and Punta Arenas, Chile, in September-November 2011. The proportions of iodine species (iodide, iodate and soluble organic iodine (SOI)) varied markedly between size fractions and with the extent to which the samples were influenced by pollutants. In general, fine mode aerosols (< 1 μm) contained higher proportions of both iodide and SOI, while iodate was the dominant component of coarse (< 1 μm) aerosols. The highest proportions of iodate were observed in aerosols that contained (alkaline) unpolluted sea spray or mineral dust. Fine mode samples with high concentrations of acidic species (e.g. non-sea-salt sulfate) contained very little iodate and elevated proportions of iodide and SOI. These results are in agreement with modelling studies that indicate that iodate can be reduced under acidic conditions and that the resulting hypoiodous acid (HOI) can react with organic matter to produce SOI and iodide. Further work that investigates the link between iodine speciation and aerosol pH directly, as well as studies on the formation and decay of organo-iodine compounds under aerosol conditions, will be necessary before the importance of this chemistry in regulating aerosol iodine speciation can be confirmed. © 2021 The Author(s).
语种	英语
scopus关键词	acidity; aerosol composition; iodine; measurement method; pH; speciation (chemistry); Avonmouth; Bristol [England]; Chile; England; Magallanes; Punta Arenas; United Kingdom
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/246612
作者单位	Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom; Department of Environmental Science, Faculty of Science and Technology, Chiang Mai Rajabhat University, Chiang Mai, 50300, Thailand
推荐引用方式 GB/T 7714	Baker A.R.,Yodle C.. Measurement report: Indirect evidence for the controlling influence of acidity on the speciation of iodine in Atlantic aerosols[J],2021,21(17).
APA	Baker A.R.,&Yodle C..(2021).Measurement report: Indirect evidence for the controlling influence of acidity on the speciation of iodine in Atlantic aerosols.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(17).
MLA	Baker A.R.,et al."Measurement report: Indirect evidence for the controlling influence of acidity on the speciation of iodine in Atlantic aerosols".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.17(2021).