气候变化领域集成服务门户(CCPortal): Water-soluble ion components of PM10 during the winter-spring season in a typical polluted city in Northeast China

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DOI	10.1007/s11356-019-04199-x
	Water-soluble ion components of PM10 during the winter-spring season in a typical polluted city in Northeast China
	Hong, Ye; Ma, Yanjun; Sun, Junying; Li, Chaoliu; Zhang, Yunhai; Li, Xiaolan; Zhou, Deping; Wang, Yangfeng; Liu, Ningwei
通讯作者	Sun, JY (通讯作者)
发表日期	2019
ISSN	0944-1344
EISSN	1614-7499
起始页码	7055
结束页码	7070
卷号	26 期号:7
英文摘要	From January 1 to April 22, 2014, an online analyzer for monitoring aerosols and gases (MARGA) was used to measure and analyze water-soluble ions in inhalable particulate matter with a diameter less than 10m (PM10) during winter-spring in Shenyang city, China. The results yielded three main findings. (1) During the entire observation period and in seven pollution episodes, SO42-, NO3-, and NH4+ (SNA) accounted for 84.4-93.1% of the total water-soluble ions (TWSIs). TWSIs accounted for 32% of PM10 mass during the entire observation period, and the contribution of TWSIs in PM10 ranged from 33.4-43.1% in the seven pollution episodes. The contribution of TWSIs components increased during the pollution episodes, but certain differences were observed in different pollution episodes. In terms of ionic equilibrium, the total concentration of negative ions was slightly greater than that of positive ions and the difference was 3.1% of the total ion load on average, indicating that local aerosols are mainly neutral. The water-soluble ions show clear diurnal variation with the high concentration around 09:00 for SO42-, NH4+, and Cl- which is consistent with the high heating grade index. (2) Pollution episodes often occur in Northeast China, especially during the winter period. Due to the low temperature in the winter, the local coal burning for heating is one of the main sources of pollution besides vehicle exhaust and industrial pollution, which is supported by the higher NO3-/SO42- ratio in April than that in January to March. Sometimes, under the prevailing wind directions of W and SSW, the long-distance transport of pollutants from the Beijing-Tianjin-Hebei region and Shandong province superimposed on local pollution leads to the most severe pollution, such as Ep3 and Ep5. (3) SO42- concentration is closely related to ambient water vapor pressure (e), with increase as e increased depending on the temperature. NO3- concentration showed a linear relationship of excess NH4+, which suggests homogeneous gas-phase reaction of ammonia and nitric acid is possibly an important pathways of nitrate formation in the haze pollution process in Shenyang City. In addition, our results also suggest the nighttime liquid-phase reaction may cause large increases of nitrate in the haze pollution process.
关键词	REAL-TIME MEASUREMENTS EVOLUTION PROCESSES SAMPLING ARTIFACTS INORGANIC-IONS RURAL SITE HAZE EVENT PM2.5 AEROSOLS AMMONIA REGION
英文关键词	Haze; MARGA; PM10; Shenyang; Water-soluble ions
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000462457500070
来源期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259455
推荐引用方式 GB/T 7714	Hong, Ye,Ma, Yanjun,Sun, Junying,et al. Water-soluble ion components of PM10 during the winter-spring season in a typical polluted city in Northeast China[J]. 中国科学院青藏高原研究所,2019,26(7).
APA	Hong, Ye.,Ma, Yanjun.,Sun, Junying.,Li, Chaoliu.,Zhang, Yunhai.,...&Liu, Ningwei.(2019).Water-soluble ion components of PM10 during the winter-spring season in a typical polluted city in Northeast China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,26(7).
MLA	Hong, Ye,et al."Water-soluble ion components of PM10 during the winter-spring season in a typical polluted city in Northeast China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 26.7(2019).