The pollution levels, variation characteristics, sources and implications of atmospheric carbonyls in a typical rural area of North China Plain during winter

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	The pollution levels, variation characteristics, sources and implications of atmospheric carbonyls in a typical rural area of North China Plain during winter
	Wang, Jinhe; Sun, Shuyu; Zhang, Chongxu; Xue, Chaoyang; Liu, Pengfei; Zhang, Chenglong; Mu, Yujing; Wu, Hai; Wang, Defa; Chen, Hui
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2020-09
卷号	95 页码:256-265
关键词	Carbonyl compounds Pollution characteristics Source apportionment Ozone formation Environmental implication
ISSN号	1001-0742
英文摘要	Atmospheric carbonyls were measured at a typical rural area of the North China Plain (NCP) from November 13 to December 24, 2017 to investigate the pollution characteristics, sources and environmental implications. Fifteen carbonyls were detected, and formaldehyde, acetaldehyde and acetone accounted for about 81% at most. The concentration of the total carbonyls in heavily polluted days was twice more than that in clean days. In contrast to other carbonyls, m-tolualdehyde exhibited relatively high concentrations in the clean days in comparison with the polluted days. The ratios of three principal carbonyls to CO showed similar daily variations at different pollution levels with significant daytime peaks. Multiple linear regression analysis revealed that the contributions of background, primary and secondary sources to three principal carbonyls showed similar variation trends from the clean level to the heavily polluted level. The OH formation rate of formaldehyde showed a similar variation trend to its photodegradation rate, reaching the peak value at noon, which is important to maintain relatively high OH levels to initiate the oxidation of various gas-phase pollutants for secondary pollutant formation at the rural site. OH radical consumption rate and ozone formation potential (OFP) calculations showed that formaldehyde and acetaldehyde were the dominant oxidative species among measured carbonyls. As for OH radical consumption, n-butyraldehyde and m-tolualdehyde were important contributors, while for ozone formation potential, n-butyraldehyde and propionaldehyde made significant contributions. In addition, the contribution of carbonyl compounds to secondary organic aerosol (SOA) formation was also important and needs further investigation. (c) 2020 Published by Elsevier B.V. on behalf of The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44558]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Wang, Jinhe,Sun, Shuyu,Zhang, Chongxu,et al. The pollution levels, variation characteristics, sources and implications of atmospheric carbonyls in a typical rural area of North China Plain during winter[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2020,95:256-265.
APA	Wang, Jinhe.,Sun, Shuyu.,Zhang, Chongxu.,Xue, Chaoyang.,Liu, Pengfei.,...&Chen, Jianmin.(2020).The pollution levels, variation characteristics, sources and implications of atmospheric carbonyls in a typical rural area of North China Plain during winter.JOURNAL OF ENVIRONMENTAL SCIENCES,95,256-265.
MLA	Wang, Jinhe,et al."The pollution levels, variation characteristics, sources and implications of atmospheric carbonyls in a typical rural area of North China Plain during winter".JOURNAL OF ENVIRONMENTAL SCIENCES 95(2020):256-265.