High N2O5 Concentrations Observed in Urban Beijing: Implications of a Large Nitrate Formation Pathway

Haichao Wang; Keding Lu; Xiaorui Chen; Qindan Zhu; Qi Chen; Song Guo; Meiqing Jiang; Xin Li; Dongjie Shang; Zhaofeng Tan; Yusheng Wu; Zhijun Wu; Qi Zou; Yan Zheng; Limin Zeng; Tong Zhu; Min Hu; Yuanhang Zhang

doi:10.1021/acs.estlett.7b00341

High N₂O₅ Concentrations Observed in Urban Beijing: Implications of a Large Nitrate Formation Pathway

Haichao Wang, Keding Lu, Xiaorui Chen, Qindan Zhu, Qi Chen, Song Guo, Meiqing Jiang, Xin Li, Dongjie Shang, Zhaofeng Tan, Yusheng Wu, Zhijun Wu, Qi Zou, Yan Zheng, Limin Zeng, Tong Zhu, Min Hu, Yuanhang Zhang

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186 Scopus citations

Abstract

The heterogeneous hydrolysis of dinitrogen pentoxide (N₂O₅) is important to understanding the formation of particulate nitrate (pNO₃^-). Measurements of N₂O₅ in the surface layer taken at an urban site in Beijing are presented here. N₂O₅ was observed with large day-to-day variability. High N₂O₅ concentrations were determined during pollution episodes with the co-presence of large aerosol loads. The maximum value was 1.3 ppbv (5 s average), associated with an air mass characterized by a high level of O₃. N₂O₅ uptake coefficients were estimated to be in the range of 0.025-0.072 using the steady-state lifetime method. As a consequence, the nocturnal pNO₃^- formation potential by N₂O₅ heterogeneous uptake was calculated to be 24-85 μg m^-3 per night and, on average, 57 μg m^-3 during days with pollution. This was comparable to or even higher than that formed by the partitioning of HNO₃. The results highlight that N₂O₅ heterogeneous hydrolysis is vital in pNO₃^- formation in Beijing.

Original language	English
Pages (from-to)	416-420
Number of pages	5
Journal	Environmental Science and Technology Letters
Volume	4
Issue number	10
DOIs	https://doi.org/10.1021/acs.estlett.7b00341
State	Published - Oct 10 2017
Externally published	Yes

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Wang, H., Lu, K., Chen, X., Zhu, Q., Chen, Q., Guo, S., Jiang, M., Li, X., Shang, D., Tan, Z., Wu, Y., Wu, Z., Zou, Q., Zheng, Y., Zeng, L., Zhu, T., Hu, M., & Zhang, Y. (2017). High N₂O₅ Concentrations Observed in Urban Beijing: Implications of a Large Nitrate Formation Pathway. Environmental Science and Technology Letters, 4(10), 416-420. https://doi.org/10.1021/acs.estlett.7b00341

@article{6093216ed5c245e99159dea6fb940b4d,

title = "High N2O5 Concentrations Observed in Urban Beijing: Implications of a Large Nitrate Formation Pathway",

abstract = "The heterogeneous hydrolysis of dinitrogen pentoxide (N2O5) is important to understanding the formation of particulate nitrate (pNO3-). Measurements of N2O5 in the surface layer taken at an urban site in Beijing are presented here. N2O5 was observed with large day-to-day variability. High N2O5 concentrations were determined during pollution episodes with the co-presence of large aerosol loads. The maximum value was 1.3 ppbv (5 s average), associated with an air mass characterized by a high level of O3. N2O5 uptake coefficients were estimated to be in the range of 0.025-0.072 using the steady-state lifetime method. As a consequence, the nocturnal pNO3- formation potential by N2O5 heterogeneous uptake was calculated to be 24-85 μg m-3 per night and, on average, 57 μg m-3 during days with pollution. This was comparable to or even higher than that formed by the partitioning of HNO3. The results highlight that N2O5 heterogeneous hydrolysis is vital in pNO3- formation in Beijing.",

author = "Haichao Wang and Keding Lu and Xiaorui Chen and Qindan Zhu and Qi Chen and Song Guo and Meiqing Jiang and Xin Li and Dongjie Shang and Zhaofeng Tan and Yusheng Wu and Zhijun Wu and Qi Zou and Yan Zheng and Limin Zeng and Tong Zhu and Min Hu and Yuanhang Zhang",

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2017",

month = oct,

day = "10",

doi = "10.1021/acs.estlett.7b00341",

language = "English",

volume = "4",

pages = "416--420",

journal = "Environmental Science and Technology Letters",

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publisher = "American Chemical Society",

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Wang, H, Lu, K, Chen, X, Zhu, Q, Chen, Q, Guo, S, Jiang, M, Li, X, Shang, D, Tan, Z, Wu, Y, Wu, Z, Zou, Q, Zheng, Y, Zeng, L, Zhu, T, Hu, M & Zhang, Y 2017, 'High N₂O₅ Concentrations Observed in Urban Beijing: Implications of a Large Nitrate Formation Pathway', Environmental Science and Technology Letters, vol. 4, no. 10, pp. 416-420. https://doi.org/10.1021/acs.estlett.7b00341

TY - JOUR

T1 - High N2O5 Concentrations Observed in Urban Beijing

T2 - Implications of a Large Nitrate Formation Pathway

AU - Wang, Haichao

AU - Lu, Keding

AU - Chen, Xiaorui

AU - Zhu, Qindan

AU - Chen, Qi

AU - Guo, Song

AU - Jiang, Meiqing

AU - Li, Xin

AU - Shang, Dongjie

AU - Tan, Zhaofeng

AU - Wu, Yusheng

AU - Wu, Zhijun

AU - Zou, Qi

AU - Zheng, Yan

AU - Zeng, Limin

AU - Zhu, Tong

AU - Hu, Min

AU - Zhang, Yuanhang

PY - 2017/10/10

Y1 - 2017/10/10

N2 - The heterogeneous hydrolysis of dinitrogen pentoxide (N2O5) is important to understanding the formation of particulate nitrate (pNO3-). Measurements of N2O5 in the surface layer taken at an urban site in Beijing are presented here. N2O5 was observed with large day-to-day variability. High N2O5 concentrations were determined during pollution episodes with the co-presence of large aerosol loads. The maximum value was 1.3 ppbv (5 s average), associated with an air mass characterized by a high level of O3. N2O5 uptake coefficients were estimated to be in the range of 0.025-0.072 using the steady-state lifetime method. As a consequence, the nocturnal pNO3- formation potential by N2O5 heterogeneous uptake was calculated to be 24-85 μg m-3 per night and, on average, 57 μg m-3 during days with pollution. This was comparable to or even higher than that formed by the partitioning of HNO3. The results highlight that N2O5 heterogeneous hydrolysis is vital in pNO3- formation in Beijing.

AB - The heterogeneous hydrolysis of dinitrogen pentoxide (N2O5) is important to understanding the formation of particulate nitrate (pNO3-). Measurements of N2O5 in the surface layer taken at an urban site in Beijing are presented here. N2O5 was observed with large day-to-day variability. High N2O5 concentrations were determined during pollution episodes with the co-presence of large aerosol loads. The maximum value was 1.3 ppbv (5 s average), associated with an air mass characterized by a high level of O3. N2O5 uptake coefficients were estimated to be in the range of 0.025-0.072 using the steady-state lifetime method. As a consequence, the nocturnal pNO3- formation potential by N2O5 heterogeneous uptake was calculated to be 24-85 μg m-3 per night and, on average, 57 μg m-3 during days with pollution. This was comparable to or even higher than that formed by the partitioning of HNO3. The results highlight that N2O5 heterogeneous hydrolysis is vital in pNO3- formation in Beijing.

UR - https://www.scopus.com/pages/publications/85030985926

U2 - 10.1021/acs.estlett.7b00341

DO - 10.1021/acs.estlett.7b00341

M3 - Article

AN - SCOPUS:85030985926

SN - 2328-8930

VL - 4

SP - 416

EP - 420

JO - Environmental Science and Technology Letters

JF - Environmental Science and Technology Letters

IS - 10

ER -

High N₂O₅ Concentrations Observed in Urban Beijing: Implications of a Large Nitrate Formation Pathway

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