金华市大气$PM_{2.5}$中WSON的质量浓度及来源

doi:10.12066/j.issn.1007-2861.1809

上海大学学报(自然科学版) ›› 2018, Vol. 24 ›› Issue (3): 437-445.doi: 10.12066/j.issn.1007-2861.1809

金华市大气$PM_{2.5}$中WSON的质量浓度及来源

赵博阳¹, 项成龙², 陈焕兵¹, 常毅¹, 冯加良¹()

1.上海大学环境与化学工程学院, 上海 200444
2.金华市环境监测中心站, 浙江金华 321000

收稿日期:2016-05-25 出版日期:2018-06-15 发布日期:2018-06-28
通讯作者: 冯加良 E-mail:fengjialiang@shu.edu.cn
基金资助:
国家自然科学基金资助项目(41473088);金华市环保局资助项目(YG2014-FW673-ZFCG046)

Concentration and sources of WSON in $PM_{2.5}$ in Jinhua

ZHAO Boyang¹, XIANG Chenglong², CHEN Huanbing¹, CHANG Yi¹, FENG Jialiang¹()

1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
2. Jinhua Environmental Monitoring Center, Jinhua 321000, Zhejiang, China

Received:2016-05-25 Online:2018-06-15 Published:2018-06-28
Contact: FENG Jialiang E-mail:fengjialiang@shu.edu.cn

摘要/Abstract

摘要：

含氮化合物是大气细颗粒物(PM$_{2.5})$的重要组分,其中含氮有机物是含氮组分的重要存在形式,对陆地和水生生态系统影响较大.于2015年4月、7月和10月分别采集了金华市3个具有代表性站点的PM$_{2.5}$样品,分析了其中水溶性有机氮(water-soluble organic nitrogen, WSON)的质量浓度分布及季节变化特征. 结果表明:金华市PM$_{2.5}$中WSON质量浓度范围为0.06$\sim $6.90 $\mu $g/m$^{3}$, 平均1.90 $\mu $g/m$^{3}$,对水溶性总氮(water-soluble total nitrogen, WSTN)的平均贡献率为31 %.WSON的质量浓度分布具有明显的季节变化特征: 秋季较高, 夏季较低,而在夏季WSON对WSTN的贡献率最高.金华市PM$_{2.5}$中WSON的主要来源可能是含氮前体物在大气中的二次转化以及生物质燃烧活动.

关键词: 水溶性有机氮, 水溶性离子, PM$_{2.5}$, 来源识别, 金华市

Abstract:

Nitrogen-containing components account for an important part of the fine particulate matter (PM$_{2.5})$, and many of the nitrogen-containing compounds are in organic form. Nitrogen-containing organics have great potential adverse impacts on the land and water ecosystem. Seasonal PM$_{2.5}$ samples were collected from spring to autumn in 2015 in Jinhua. Concentration and seasonal variation of water-soluble organic nitrogen (WSON) in the samples were analyzed. Concentration of WSON in PM$_{2.5}$ in Jinhua ranged from 0.06 to 6.90 $\mu $g/m$^{3}$ with an average of 1.90 $\mu $g/m$^{3}$, accounted for 31 % of the water-soluble total nitrogen (WSTN). Distinct seasonal variation in the concentration of WSON was found in Jinhua, with higher concentrations in autumn and spring, and the lowest in summer. On the contrary, contribution of WSON to WSTN in summer was higher than that in other seasons. The main sources of WSON in PM$_{2.5}$ in Jinhua should be the secondary formation in the atmosphere from the nitrogen-containing precursors and biomass burning emission.

Key words: water-soluble organic nitrogen (WSON), water-soluble ion, PM$_{2.5}$, source identification, Jinhua

中图分类号:

赵博阳, 项成龙, 陈焕兵, 常毅, 冯加良. 金华市大气$PM_{2.5}$中WSON的质量浓度及来源[J]. 上海大学学报(自然科学版), 2018, 24(3): 437-445.

ZHAO Boyang, XIANG Chenglong, CHEN Huanbing, CHANG Yi, FENG Jialiang. Concentration and sources of WSON in $PM_{2.5}$ in Jinhua[J]. Journal of Shanghai University（Natural Science Edition）, 2018, 24(3): 437-445.

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金华市大气$PM_{2.5}$中WSON的质量浓度及来源

Concentration and sources of WSON in $PM_{2.5}$ in Jinhua

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