基于傅里叶变换红外光谱技术的大气生物气溶胶测量方法研究

大气生物气溶胶不仅对空气质量和人群健康具有潜在威胁，而且对全球气候变化以及大气物理化学过程也具有间接影响。然而，受在线探测技术的限制，目前对大气气溶胶及其性质的研究相对滞后，尤其是对霾污染天气大气微生物的多样性、丰度及其时空变异特性等基本科学问题认识不足。本项目开展基于傅里叶变换红外光谱技术的大气生物气溶胶探测方法研究，通过对典型大气生物气溶胶红外吸收特性的研究，建立生物气溶胶被动红外探测模型，研究红外被动遥测背景光谱和红外测量光谱信号预处理方法，探索大气生物气溶胶云团柱浓度的反演算法，搭建红外光谱探测系统，以实现大气生物气溶胶云团的实时在线精确测量。项目的开展将为大气生物气溶胶提供新的快速有效的光学测量方法，提升大气环境监测水平，同时对于了解生物成分对空气质量以及健康效应的影响机制、生物气溶胶与大气污染及灰霾形成机制等均具有重要的科学意义和应用价值。

Atmospheric bioaerosol not only have potential threats to air quality and human health, but also have indirect effects on global climate change, atmospheric physical and chemical processes. However, due to the limitation of online detection technology, the research on atmospheric aerosol and its properties is relatively lagging behind, especially the basic scientific issues such as the diversity, abundance and spatio-temporal variation characteristics of atmospheric microorganisms in haze pollution days. This project is aimed to carry out the study of the detection method for atmospheric bioaerosol based on the Fourier transform infrared spectroscopy technology. The project is mainly focusing on the study of the infrared absorption characteristics of typical atmospheric bioaerosol, the passive infrared detection model of atmospheric bioaerosol, the pre-processing method for background spectrum and spectral signal of passive FTIR, and the inversion algorithm for the column concentration of atmospheric bioaerosol. The infrared spectrum detection system to realize the real-time and online accurate measurement of the atmospheric bioaerosol is also established in this project. The project will provide a novel, fast and efficient optical method for the measurement of atmospheric aerosols, enhance the level of atmospheric environmental monitoring, it also has important scientific significance and practical value for understanding biological ingredients impact on air quality, atmospheric pollution, effect mechanism of health and, biological aerosols and gray haze formation mechanism simultaneously.