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Computer-controlled scanning electron microscope: Methodologies and application scenarios in atmospheric particle
Wenjun Li1, Longyi Shao2, Hong Geng3
1State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Abstract:
Understanding the physicochemical properties of atmospheric particles and the refined source apportionment become a vital foundation for targeted control of air pollution. The rapid development of the computer-controlled scanning electron microscope (CCSEM) provides a new era for atmospheric particle research by improving the efficiency of individual particle analysis. This study summarized the methodologies for CCSEM-based individual particle analysis and introduced the principle, characteristics, and development of CCSEM. The application scenarios of CCSEM in the field of air quality assessment, health assessment, and climate effects of atmospheric particles were reviewed. CCSEM has a great application prospect in the refined particle source apportionment, health effect assessment, and particle source spectrum database establishment. Much attention should be paid to the establishment of a well-developed methodology system for CCSEM, including particle identification, classification method and standardization, quantitative source appointment method establishment, and analysis timeliness enhancement.
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