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Joint impact of atmospheric SO2 and NH3 on the formation of nanoparticles from photo-oxidation of a typical biomass burning compound
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020-08-06 , DOI: 10.1039/d0en00520g Xiaotong Jiang 1, 2, 3, 4 , Chen Lv 1, 2, 3, 4 , Bo You 1, 2, 3, 4 , Zhiyi Liu 1, 2, 3, 4 , Xinfeng Wang 1, 2, 3, 4 , Lin Du 1, 2, 3, 4
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020-08-06 , DOI: 10.1039/d0en00520g Xiaotong Jiang 1, 2, 3, 4 , Chen Lv 1, 2, 3, 4 , Bo You 1, 2, 3, 4 , Zhiyi Liu 1, 2, 3, 4 , Xinfeng Wang 1, 2, 3, 4 , Lin Du 1, 2, 3, 4
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The presence of atmospheric inorganic pollutants, such as SO2 and NH3 could affect the nanoparticles formation and their atmospheric abundance. In the present study, the joint impact of SO2 and NH3 on nanoparticles formation in the photo-oxidation of 3-methylfuran (3-MF) were investigated to simulate the atmospheric reactions. The experimental results demonstrated that both SO2 and NH3 have significant promotional effects on 3-MF-derived nanoparticles formation. Varying SO2 concentration in the range from 0 to ∼180 ppb caused secondary organic aerosol (SOA) yields to increase by 3.8% on an average. Meanwhile, SOA yield increased approximately by 3.3% with ∼50 ppb NH3 addition at the beginning of the experiments. Moreover, the existence of SO2 and NH3 could also obviously promote the secondary inorganic nanoparticles formation. In view of the fact that both NH3 and 3-MF are emitted into the atmosphere through agricultural activities, it is important to clarify the influence of NH3 on 3-MF photo-oxidation. The results indicated that NH3 has a substantial promotion effect on the formation of N-containing products, which were assigned as important brown carbon constituents according to their distinct absorbance in the visible region. Three C5-organosulfates (C5-OSs) with MW 196, 212, 228 were identified, which showed that 3-MF is probably one kind of precursor for the atmospheric C5-OSs. The present research provides information for understanding the joint impact of atmospheric pollutants and offers new insights into furan-derived SOA formation under heavy pollution conditions.
中文翻译：
大气中SO2和NH3对典型生物质燃烧化合物光氧化形成纳米颗粒的共同影响
大气中无机污染物（如SO 2和NH 3）的存在会影响纳米颗粒的形成及其大气丰度。在本研究中，研究了SO 2和NH 3对3-甲基呋喃（3-MF）光氧化过程中纳米颗粒形成的联合影响，以模拟大气反应。实验结果表明，SO 2和NH 3均对3-MF衍生的纳米颗粒形成具有显着的促进作用。变化2浓度范围从0到〜180 ppb导致二次有机气溶胶（SOA）的平均产量增加3.8％。同时，在实验开始时，添加约50 ppb NH 3，SOA产率提高了约3.3％。此外，SO 2和NH 3的存在还可以明显促进次生无机纳米粒子的形成。鉴于通过农业活动将NH 3和3-MF排放到大气中，弄清NH 3对3-MF光氧化的影响很重要。结果表明，NH 3对含氮产物的形成具有显着的促进作用，根据其在可见光区的独特吸收率，这些产物被指定为重要的棕色碳组分。三架C 5 -organosulfates（C 5 -oss）具有MW 196，212，228进行了鉴定，这表明3-MF可能是一种前体对大气Ç 5 -oss。本研究为理解大气污染物的共同影响提供了信息，并为重污染条件下呋喃衍生的SOA形成提供了新的见解。
更新日期：2020-09-18
中文翻译：
大气中SO2和NH3对典型生物质燃烧化合物光氧化形成纳米颗粒的共同影响
大气中无机污染物（如SO 2和NH 3）的存在会影响纳米颗粒的形成及其大气丰度。在本研究中，研究了SO 2和NH 3对3-甲基呋喃（3-MF）光氧化过程中纳米颗粒形成的联合影响，以模拟大气反应。实验结果表明，SO 2和NH 3均对3-MF衍生的纳米颗粒形成具有显着的促进作用。变化2浓度范围从0到〜180 ppb导致二次有机气溶胶（SOA）的平均产量增加3.8％。同时，在实验开始时，添加约50 ppb NH 3，SOA产率提高了约3.3％。此外，SO 2和NH 3的存在还可以明显促进次生无机纳米粒子的形成。鉴于通过农业活动将NH 3和3-MF排放到大气中，弄清NH 3对3-MF光氧化的影响很重要。结果表明，NH 3对含氮产物的形成具有显着的促进作用，根据其在可见光区的独特吸收率，这些产物被指定为重要的棕色碳组分。三架C 5 -organosulfates（C 5 -oss）具有MW 196，212，228进行了鉴定，这表明3-MF可能是一种前体对大气Ç 5 -oss。本研究为理解大气污染物的共同影响提供了信息，并为重污染条件下呋喃衍生的SOA形成提供了新的见解。
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