Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
Volume 4, Issue 10, Pages 416-420Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.estlett.7b00341
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [41375124, 91544225, 21522701, 41421064]
- Chinese Academy of Sciences [XDB05010500]
- National Key Research and Development Program of China [2016YFC0202003]
- State Key Joint Laboratory of Environment Simulation and Pollution Control [16Y01ESPCP]
Ask authors/readers for more resources
The heterogeneous hydrolysis of dinitrogen pentoxide (N2O5) is important to understanding the formation of particulate nitrate (pNO(3)(-)). 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 O-3. 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 pNO(3)(-) formation potential by N2O5 heterogeneous uptake was calculated to be 24-85 mu g m(-3) per night and, on average, 57 mu g 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 pNO(3)(-) formation in Beijing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available