当前位置:
X-MOL 学术
›
Environ. Sci. Technol.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Constraints on Aerosol Nitrate Photolysis as a Potential Source of HONO and NOx
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-11-20 , DOI: 10.1021/acs.est.8b03861
Paul S. Romer 1 , Paul J. Wooldridge 1 , John D. Crounse 2 , Michelle J. Kim 2 , Paul O. Wennberg 2, 3 , Jack E. Dibb 4 , Eric Scheuer 4 , Donald R. Blake 5 , Simone Meinardi 5 , Alexandra L. Brosius 6 , Alexander B. Thames 6 , David O. Miller 6 , William H. Brune 6 , Samuel R. Hall 7 , Thomas B. Ryerson 8 , Ronald C. Cohen 1, 9
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-11-20 , DOI: 10.1021/acs.est.8b03861
Paul S. Romer 1 , Paul J. Wooldridge 1 , John D. Crounse 2 , Michelle J. Kim 2 , Paul O. Wennberg 2, 3 , Jack E. Dibb 4 , Eric Scheuer 4 , Donald R. Blake 5 , Simone Meinardi 5 , Alexandra L. Brosius 6 , Alexander B. Thames 6 , David O. Miller 6 , William H. Brune 6 , Samuel R. Hall 7 , Thomas B. Ryerson 8 , Ronald C. Cohen 1, 9
Affiliation
![]() |
The concentration of nitrogen oxides (NOx) plays a central role in controlling air quality. On a global scale, the primary sink of NOx is oxidation to form HNO3. Gas-phase HNO3 photolyses slowly with a lifetime in the troposphere of 10 days or more. However, several recent studies examining HONO chemistry have proposed that particle-phase HNO3 undergoes photolysis 10–300 times more rapidly than gas-phase HNO3. We present here constraints on the rate of particle-phase HNO3 photolysis based on observations of NOx and HNO3 collected over the Yellow Sea during the KORUS-AQ study in summer 2016. The fastest proposed photolysis rates are inconsistent with the observed NOx to HNO3 ratios. Negligible to moderate enhancements of the HNO3 photolysis rate in particles, 1–30 times faster than in the gas phase, are most consistent with the observations. Small or moderate enhancement of particle-phase HNO3 photolysis would not significantly affect the HNO3 budget but could help explain observations of HONO and NOx in highly aged air.
中文翻译:
限制气溶胶硝酸盐光解作为HONO和NO x的潜在来源
氮氧化物(NO x)的浓度在控制空气质量中起着核心作用。在全球范围内,NO x的主要汇是氧化形成HNO 3。气相HNO 3在对流层中的寿命为10天或更长时间时会缓慢地进行光解。但是,最近几项研究HONO化学的研究表明,粒子相HNO 3的光解速度比气相HNO 3快10-300倍。我们在此基于NO x和HNO 3的观察结果,对颗粒相HNO 3光解速率的约束条件在2016年夏季进行的KORUS-AQ研究期间,黄海中收集到的光。建议的最快光解速率与观察到的NO x与HNO 3的比例不一致。与观察到的结果相比,颗粒中HNO 3的光解速率可忽略不计的中等提高,比气相快1至30倍。颗粒相HNO 3光解的少量或中等增强不会显着影响HNO 3的收支,但可以帮助解释在高度老化的空气中观测到的HONO和NO x。
更新日期:2018-11-21
中文翻译:

限制气溶胶硝酸盐光解作为HONO和NO x的潜在来源
氮氧化物(NO x)的浓度在控制空气质量中起着核心作用。在全球范围内,NO x的主要汇是氧化形成HNO 3。气相HNO 3在对流层中的寿命为10天或更长时间时会缓慢地进行光解。但是,最近几项研究HONO化学的研究表明,粒子相HNO 3的光解速度比气相HNO 3快10-300倍。我们在此基于NO x和HNO 3的观察结果,对颗粒相HNO 3光解速率的约束条件在2016年夏季进行的KORUS-AQ研究期间,黄海中收集到的光。建议的最快光解速率与观察到的NO x与HNO 3的比例不一致。与观察到的结果相比,颗粒中HNO 3的光解速率可忽略不计的中等提高,比气相快1至30倍。颗粒相HNO 3光解的少量或中等增强不会显着影响HNO 3的收支,但可以帮助解释在高度老化的空气中观测到的HONO和NO x。