...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric chemistry and physics >Revisiting the reaction of dicarbonyls in aerosol proxy solutions containing ammonia: the case of butenedial
【24h】

Revisiting the reaction of dicarbonyls in aerosol proxy solutions containing ammonia: the case of butenedial

机译：重新探测含有氨的气溶胶代理溶液中二羰基的反应：施工的情况

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Reactions in aqueous solutions containing dicarbonyls (especially the α -dicarbonyls methylglyoxal, glyoxal, and biacetyl) and reduced nitrogen (NH x ) have been studied extensively. It has been proposed that accretion reactions from dicarbonyls and NH x could be a source of particulate matter and brown carbon in the atmosphere and therefore have direct implications for human health and climate. Other dicarbonyls, such as the 1,4-unsaturated dialdehyde butenedial, are also produced from the atmospheric oxidation of volatile organic compounds, especially aromatics and furans, but their aqueous-phase reactions with NH x have not been characterized. In this work, we determine a pH-dependent mechanism of butenedial reactions in aqueous solutions with NH x that is compared to α -dicarbonyls, in particular the dialdehyde glyoxal. Similar to glyoxal, butenedial is strongly hydrated in aqueous solutions. Butenedial reaction with NH x also produces nitrogen-containing rings and leads to accretion reactions that form brown carbon. Despite glyoxal and butenedial both being dialdehydes, butenedial is observed to have three significant differences in its chemical behavior: (1)?as previously shown, butenedial does not substantially form acetal oligomers, (2)?the butenedial/OH ? reaction leads to light-absorbing compounds, and (3)?the butenedial/NH x reaction is fast and first order in the dialdehyde. Building off of a complementary study on butenedial gas-particle partitioning, we suggest that the behavior of other reactive dialdehydes and dicarbonyls may not always be adequately predicted by α -dicarbonyls, even though their dominant functionalities are closely related. The carbon skeleton (e.g., its hydrophobicity, length, and bond structure) also governs the fate and climate-relevant properties of dicarbonyls in the atmosphere. If other dicarbonyls behave like butenedial, their reaction with NH x could constitute a regional source of brown carbon to the atmosphere.
机译：已经广泛研究了含有二羰基（特别是α-二羰基甲基乙二醛，乙二酰基）和还原的氮（NH X）的水溶液中的反应。已经提出，二羰基和NH X的增生反应可以是大气中颗粒物质和棕色碳的来源，因此对人类健康和气候有直接影响。其他二羰基，例如1,4-不饱和二醛丁二烯，也是由挥发性有机化合物的大气氧化，尤其是芳烃和呋喃，但尚未表征与NH X的水相反应。在这项工作中，我们确定与NH X的水溶液中的丁二烯反应的pH依赖性机制，其与α-二羰基，特别是二丁基乙二醛。与乙醛相似，在水溶液中强烈水溶性施工。与NH X的丁二烯反应还产生含氮环，并导致形成棕色碳的增生反应。尽管血糖和丁二型均是二醛，但遵守丁二型在其化学行为中具有三种显着差异：（1）？如前所述，丁二型不基本上形成缩醛寡聚体，（2）？丁二烯/哦？反应导致光吸收的化合物，（3）？丁二烯/ NH X反应在二醛中快速且第一顺序。建立对丁基径气颗粒分配的互补研究，我们表明其他反应性二醛和二羰基的行为可能并不总是通过α-二羰基因预测，即使它们的主体官能团密切相关。碳骨架（例如，其疏水性，长度和债券结构）也控制了大气中二羰基的命运和气候相关性质。如果其他二羰基的表现类似，它们与NH X的反应可以构成到大气中的棕色碳的区域来源。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号