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.)
Production of N2O5 and ClNO2 through Nocturnal Processing of Biomass-Burning Aerosol
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2017-12-21 00:00:00 , DOI: 10.1021/acs.est.7b04386
Adam T. Ahern 1 , Lexie Goldberger 2 , Lydia Jahl 1 , Joel Thornton 2 , Ryan C. Sullivan 1
Affiliation  

Biomass burning is a source of both particulate chloride and nitrogen oxides, two important precursors for the formation of nitryl chloride (ClNO2), a source of atmospheric oxidants that is poorly prescribed in atmospheric models. We investigated the ability of biomass burning to produce N2O5(g) and ClNO2(g) through nocturnal chemistry using authentic biomass-burning emissions in a smog chamber. There was a positive relationship between the amount of ClNO2 formed and the total amount of particulate chloride emitted and with the chloride fraction of nonrefractory particle mass. In every fuel tested, dinitrogen pentoxide (N2O5) formed quickly, following the addition of ozone to the smoke aerosol, and ClNO2(g) production promptly followed. At atmospherically relevant relative humidities, the particulate chloride in the biomass-burning aerosol was rapidly but incompletely displaced, likely by the nitric acid produced largely by the heterogeneous uptake of N2O5(g). Despite this chloride acid displacement, the biomass-burning aerosol still converted on the order of 10% of reacted N2O5(g) into ClNO2(g). These experiments directly confirm that biomass burning is a potentially significant source of atmospheric N2O5 and ClNO2 to the atmosphere.

中文翻译:

夜间燃烧生物质气溶胶生产N 2 O 5和ClNO 2的方法

生物质燃烧既是颗粒氯化物又是氮氧化物的来源,这是形成硝酰氯(ClNO 2)的两种重要前体,这是大气模型中规定不佳的大气氧化剂的来源。我们使用烟雾室中真实的生物质燃烧排放物,通过夜间化学研究了生物质燃烧产生N 2 O 5(g)和ClNO 2(g)的能力。在形成的ClNO 2的量与排放的颗粒氯化物的总量之间以及与非耐火颗粒质量的氯化物分数之间存在正相关关系。在每种测试的燃料中,五氧化二氮(N 2 O 5在向烟雾中添加臭氧后迅速形成),然后迅速产生ClNO 2(g)。在与大气相关的相对湿度下,燃烧生物质的气溶胶中的氯化物颗粒迅速而不完全地被置换,这很可能是由于N 2 O 5(g)的异质吸收所产生的硝酸所致。尽管有这种氯酸的置换,燃烧生物质的气溶胶仍按反应的N 2 O 5(g)的10%量级转化为ClNO 2(g)。这些实验直接证实了生物质燃烧是大气中N 2 O 5和ClNO 2的潜在重要来源。 大气。
更新日期:2017-12-22
down
wechat
bug