Research Progress on Determination Methods of Atmospheric Brown Carbon

Source: Journal of Environmental Engineering Technology

Work       Person : Wang Lei, Jin Wenjing, Zhi Guorui, Zhang Yuzhe, Guo Sicong, Sun Jianzhong

Single       Bits : State Key Laboratory of Environmental Benchmarks and Risk Assessment, China Environmental Science Research Institute; School of Science, China University of Petroleum (Beijing); College of Chemistry and Chemical Engineering, Taiyuan University of Technology; Institute of Physical Education, Shangrao Normal University

Fund projects : National Natural Science Foundation of China; National Key Research and Development Program Project   ; Special Project of Basic Scientific Research Business of China Environmental Science Research Institute

Summary

  Atmospheric brown carbon (BrC) is the general term of organic carbon (OC) with absorbency in carbon aerosols. Compared with black carbon (BC), its absorbency increases faster with the wavelength becoming shorter, which is one of the hotspots in the research field of atmospheric aerosol energy budget in recent years. BrC comes from a wide range of sources and does not specifically refer to a chemical substance, so there are few recognized standard determination methods or reference substances for BrC at present.

This paper introduces the method of BrC determination reported in literature, Include a chemical method to separate BrC by solvent extraction, an optical method to separate BrC's absorption contribution by means of the difference in absorbance between BrC and BC, a thermo-optical method to optically separate BrC from other substances by means of the difference in thermal stability between BrC and BC on a traditional thermo-optical carbon analyzer, and a molecular level-oriented BrC characterization method mass spectrometry. The principle, characteristics, application and research progress of various determination methods are systematically summarized and reviewed. It is pointed out that almost all the current quantitative determination methods for BrC are exploratory and have great limitations. It is necessary to construct an inclusive method system that does not exclude diversity and independence, so as to make the determination results of different methods comparable to a certain extent.

Main Chart

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Responsible work Brief Introduction of the Person

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Subsidiary State Rui , male, researcher of China Environmental Science Research Institute, doctor of environmental science, expert of national science and technology expert database, editorial board of Environmental Science Research. The research direction is the testing and control of atmospheric non-point source pollution and light-absorbing carbon aerosol, which is supported by many National Natural Science Funds and national key research and development programs in this field. At present, he has published academic papers and monographs, etc. 50 Multiple articles (parts) , In which 6 Published in SCI Area 1 , Be patented 6 Item. He participated in the revision of the current "Air Pollution Prevention Law" and was responsible for drafting non-point source content.