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Aerosol Liquid Water Promotes the Formation of Water-Soluble Organic Nitrogen in Submicrometer Aerosols in a Suburban Forest

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Title: Aerosol Liquid Water Promotes the Formation of Water-Soluble Organic Nitrogen in Submicrometer Aerosols in a Suburban Forest
Authors: Xu, Yu Browse this author
Miyazaki, Yuzo Browse this author →KAKEN DB
Tachibana, Eri Browse this author
Sato, Kei Browse this author
Ramasamy, Sathiyamurthi Browse this author
Mochizuki, Tomoki Browse this author
Sadanaga, Yasuhiro Browse this author
Nakashima, Yoshihiro Browse this author
Sakamoto, Yosuke Browse this author
Matsuda, Kazuhide Browse this author
Kajii, Yoshizumi Browse this author
Keywords: Anions
Volatile organic compounds
Issue Date: 4-Feb-2020
Publisher: American Chemical Society
Journal Title: Environmental science & technology
Volume: 54
Issue: 3
Start Page: 1406
End Page: 1414
Publisher DOI: 10.1021/acs.est.9b05849
Abstract: Water-soluble organic nitrogen (WSON) affects the formation, chemical transformations, hygroscopicity, and acidity of organic aerosols as well as biogeochemical cycles of nitrogen. However, large uncertainties exist in the origins and formation processes of WSON. Submicrometer aerosol particles were collected at a suburban forest site in Tokyo in summer 2015 to investigate the relative impacts of anthropogenic and biogenic sources on WSON formations and their linkages with aerosol liquid water (ALW). The concentrations of WSON (ave. 225 +/- 100 ngN m(-3)) and ALW exhibited peaks during nighttime, which showed a significant positive correlation, suggesting that ALW significantly contributed to WSON formation. Further, the thermodynamic predictions by ISORROPIA-II suggest that ALW was primarily driven by anthropogenic sulfate. Our analysis, including positive matrix factorization, suggests that aqueous-phase reactions of ammonium and reactive nitrogen with biogenic volatile organic compounds (VOCs) play a key role in WSON formation in submicrometer particles, which is particularly significant in nighttime, at the suburban forest site. The formation of WSON associated with biogenic VOCs and ALW was partly supported by the molecular characterization of WSON. The overall result suggests that ALW is an important driver for the formation of aerosol WSON through a combination of anthropogenic and biogenic sources.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental science and technology, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Type: article (author version)
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 宮崎 雄三

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