Chemical Characterization, Source, and SOA Production of Intermediate Volatile Organic Compounds during Haze Episodes in North China

The growth of secondary organic aerosols (SOA) is a vital cause of the outbreaks of winter haze in North China. Intermediate volatile organic compounds (IVOCs) are important precursors of SOA. Therefore, the chemical characteristics, source, and SOA production of IVOCs during haze episodes have attr...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Xinxin Feng, Jinhu Zhao, Yanli Feng, Junjie Cai, Caiqing Yan, Yingjun Chen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	chemical characterization sources IVOCs SOA production haze episodes Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/2cc8f0ebc25f43b390421e1770a20061
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:2cc8f0ebc25f43b390421e1770a20061
record_format	dspace
spelling	oai:doaj.org-article:2cc8f0ebc25f43b390421e1770a200612021-11-25T16:45:24ZChemical Characterization, Source, and SOA Production of Intermediate Volatile Organic Compounds during Haze Episodes in North China10.3390/atmos121114842073-4433https://doaj.org/article/2cc8f0ebc25f43b390421e1770a200612021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4433/12/11/1484https://doaj.org/toc/2073-4433The growth of secondary organic aerosols (SOA) is a vital cause of the outbreaks of winter haze in North China. Intermediate volatile organic compounds (IVOCs) are important precursors of SOA. Therefore, the chemical characteristics, source, and SOA production of IVOCs during haze episodes have attracted much attention. Hourly time resolution IVOC samples during two haze episodes collected in Hebei Province in North China were analyzed in this study. Results showed that: (1) the concentration of IVOCs measured was within the range of 11.3~85.1 μg·cm<sup>−3</sup> during haze episodes, with normal alkanes (<i>n</i>-alkanes), polycyclic aromatic hydrocarbons (PAHs), branched alkanes (<i>b</i>-alkanes), and the residue unresolved complex mixture (R-UCM) accounting for 8.6 ± 2.3%, 6.8 ± 2.2%, 24.1 ± 3.8%, and 60.5 ± 6.5% of IVOCs, respectively. <i>N</i>C<sub>12</sub>-<i>n</i>C<sub>15</sub> in <i>n</i>-alkanes, naphthalene and its alkyl substitutes in PAHs, <i>b</i>-alkanes in B<sub>12</sub>–B<sub>16</sub> bins, and R-UCM in B<sub>12</sub>–B<sub>16</sub> bins are the main components, accounting for 87.0 ± 0.2%, 87.6 ± 2.9%, 85.9 ± 5.4%, 74.0 ± 8.3%, respectively. (2) Based on the component characteristics of IVOCs and the ratios of <i>n</i>-alkanes/<i>b</i>-alkanes in emission sources and the hourly variation of IVOCs during haze episodes, coal combustion (CC), biomass burning (BB), gasoline vehicles (GV), and diesel vehicles (DV)were identified as important emission sources of IVOCs in Hebei Province. (3) During haze episodes, temporal variation of the estimated SOA production based on different methods (such as IVOCs concentration, OC/EC<sub>min</sub> tracer, and the PMF model) were similar; however, the absolute values were different. This difference may be due to the transformation of IVOCs to SOA affected by various factors such as SOA production from different IVOC components, meteorological conditions, atmospheric oxidation, etc.Xinxin FengJinhu ZhaoYanli FengJunjie CaiCaiqing YanYingjun ChenMDPI AGarticlechemical characterizationsourcesIVOCsSOA productionhaze episodesMeteorology. ClimatologyQC851-999ENAtmosphere, Vol 12, Iss 1484, p 1484 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	chemical characterization sources IVOCs SOA production haze episodes Meteorology. Climatology QC851-999
spellingShingle	chemical characterization sources IVOCs SOA production haze episodes Meteorology. Climatology QC851-999 Xinxin Feng Jinhu Zhao Yanli Feng Junjie Cai Caiqing Yan Yingjun Chen Chemical Characterization, Source, and SOA Production of Intermediate Volatile Organic Compounds during Haze Episodes in North China
description	The growth of secondary organic aerosols (SOA) is a vital cause of the outbreaks of winter haze in North China. Intermediate volatile organic compounds (IVOCs) are important precursors of SOA. Therefore, the chemical characteristics, source, and SOA production of IVOCs during haze episodes have attracted much attention. Hourly time resolution IVOC samples during two haze episodes collected in Hebei Province in North China were analyzed in this study. Results showed that: (1) the concentration of IVOCs measured was within the range of 11.3~85.1 μg·cm<sup>−3</sup> during haze episodes, with normal alkanes (<i>n</i>-alkanes), polycyclic aromatic hydrocarbons (PAHs), branched alkanes (<i>b</i>-alkanes), and the residue unresolved complex mixture (R-UCM) accounting for 8.6 ± 2.3%, 6.8 ± 2.2%, 24.1 ± 3.8%, and 60.5 ± 6.5% of IVOCs, respectively. <i>N</i>C<sub>12</sub>-<i>n</i>C<sub>15</sub> in <i>n</i>-alkanes, naphthalene and its alkyl substitutes in PAHs, <i>b</i>-alkanes in B<sub>12</sub>–B<sub>16</sub> bins, and R-UCM in B<sub>12</sub>–B<sub>16</sub> bins are the main components, accounting for 87.0 ± 0.2%, 87.6 ± 2.9%, 85.9 ± 5.4%, 74.0 ± 8.3%, respectively. (2) Based on the component characteristics of IVOCs and the ratios of <i>n</i>-alkanes/<i>b</i>-alkanes in emission sources and the hourly variation of IVOCs during haze episodes, coal combustion (CC), biomass burning (BB), gasoline vehicles (GV), and diesel vehicles (DV)were identified as important emission sources of IVOCs in Hebei Province. (3) During haze episodes, temporal variation of the estimated SOA production based on different methods (such as IVOCs concentration, OC/EC<sub>min</sub> tracer, and the PMF model) were similar; however, the absolute values were different. This difference may be due to the transformation of IVOCs to SOA affected by various factors such as SOA production from different IVOC components, meteorological conditions, atmospheric oxidation, etc.
format	article
author	Xinxin Feng Jinhu Zhao Yanli Feng Junjie Cai Caiqing Yan Yingjun Chen
author_facet	Xinxin Feng Jinhu Zhao Yanli Feng Junjie Cai Caiqing Yan Yingjun Chen
author_sort	Xinxin Feng
title	Chemical Characterization, Source, and SOA Production of Intermediate Volatile Organic Compounds during Haze Episodes in North China
title_short	Chemical Characterization, Source, and SOA Production of Intermediate Volatile Organic Compounds during Haze Episodes in North China
title_full	Chemical Characterization, Source, and SOA Production of Intermediate Volatile Organic Compounds during Haze Episodes in North China
title_fullStr	Chemical Characterization, Source, and SOA Production of Intermediate Volatile Organic Compounds during Haze Episodes in North China
title_full_unstemmed	Chemical Characterization, Source, and SOA Production of Intermediate Volatile Organic Compounds during Haze Episodes in North China
title_sort	chemical characterization, source, and soa production of intermediate volatile organic compounds during haze episodes in north china
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2cc8f0ebc25f43b390421e1770a20061
work_keys_str_mv	AT xinxinfeng chemicalcharacterizationsourceandsoaproductionofintermediatevolatileorganiccompoundsduringhazeepisodesinnorthchina AT jinhuzhao chemicalcharacterizationsourceandsoaproductionofintermediatevolatileorganiccompoundsduringhazeepisodesinnorthchina AT yanlifeng chemicalcharacterizationsourceandsoaproductionofintermediatevolatileorganiccompoundsduringhazeepisodesinnorthchina AT junjiecai chemicalcharacterizationsourceandsoaproductionofintermediatevolatileorganiccompoundsduringhazeepisodesinnorthchina AT caiqingyan chemicalcharacterizationsourceandsoaproductionofintermediatevolatileorganiccompoundsduringhazeepisodesinnorthchina AT yingjunchen chemicalcharacterizationsourceandsoaproductionofintermediatevolatileorganiccompoundsduringhazeepisodesinnorthchina
_version_	1718413008311418880

Chemical Characterization, Source, and SOA Production of Intermediate Volatile Organic Compounds during Haze Episodes in North China

Ejemplares similares