PM2.5气溶胶光学特性研究

Optical Properties of PM2.5 Aerosol Particles

利用FA-3型Anderson撞击式气溶胶粒度分布采样器采集大气中的可吸入颗粒物。在实验室使用光学测量系统对粒径低于PM2.5的气溶胶颗粒物进行透过率测量。结果表明,透过率随气溶胶粒子粒径的增大具有逐渐增加的趋势。粒径低于PM2.5的气溶胶颗粒与PM10粒径范围内的透过率相比,具有明显的波长选择性。

The FA-3 impingement sampler for measuring aerosol particle size distribution is used to collect the information of the inhalable particles in the atmosphere. The optical measurement system in the laboratory is utilized to measure the transmittance of the aerosol particulates with different sizes. The results show that the transmittance is gradually increasing with the increase of aerosol particles size. The transmittance of those particles less than PM2.5 has more obvious wavelength se lectivity than that of the particles within PM10 size.