摘要
棕色碳是一类重要的吸光性有机气溶胶,对全球辐射强迫有重要贡献。其化学成分和形成机制是地球科学研究的前沿和难点。模拟实验结果表明,羰基化合物和还原性氮的液相反应产物在近紫外波段具有较强的吸光性,且化学成分复杂,难以分离和鉴定。本研究回顾了基于实验室羰基化合物和还原性氮的反应速率、反应机制,以及反应产物中吸光组分的化学成分和光学性质;总结了反应条件(反应物种类、浓度、溶液酸度、温度和相对湿度)对反应速率和吸光组分形成的影响;并指出了外场观测和模型研究对这一贡献认识的不足。
As one of the most important classes of light-absorbing organic aerosols,brown carbon has an important contribution to global radiative forcing.Chemical composition and formation mechanism of brown carbon are the focus and challenge in earth science research.Laboratory simulation experiments showed that the reaction products of carbonyl compounds and reduced nitrogen-containing compounds have strong absorbability in the near-ultraviolet band.The chemical composition of these reaction products is complex,which is therefore difficult to be separated and identified.In this paper,we summarize the results of reactions between carbonyl compounds and reduced nitrogen-containing compounds in the laboratory,including reaction rate,reaction mechanism,chemical composition,and optical properties of the light-absorbing reaction products.In addition,we summarize the effects of reaction conditions(i.e.,reactant type,reactant concentration,solution acidity,temperature,and relative humidity)on the reaction rate and the formation of the light-absorbing products.The present study also highlights the deficiencies of field observation and model study on these effects.
作者
廉秀峰
胡晓东
孙伟
郭子雍
唐钰婧
张国华
毕新慧
王新明
盛国英
LIAN Xiu-feng;HU Xiao-dong;SUN Wei;GUO Zi-yong;TANG Yu-jing;ZHANG Guo-hua;BI Xin-hui;WANG Xin-ming;SHENG Guo-ying(State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《地球化学》
CAS
CSCD
北大核心
2021年第1期110-120,共11页
Geochimica
基金
国家自然科学基金(41877307,41775124)
广东省省级科技计划项目(2017B030314057)。
