Summary With the rapid development of industrialization and urbanization in China, environmental problems are becoming increasingly prominent, especially the heavy polluted weather with fine particulate matte
With the rapid development of industrialization and urbanization in China, environmental problems are becoming increasingly prominent, especially the heavy polluted weather with fine particulate matter (PM2.5) as the main pollutant.
As a particulate matter with diameter less than or equal to 2.5 microns in the atmosphere, PM2.5 is easy to carry a large number of toxic and harmful substances, which can enter the human alveoli and deposit. The organic pollutants and heavy metals carried by PM2.5 are important to human health and air quality as the human circulatory system transfers to other parts of the body influence.
Since ancient times, people have fully realized the impact of fine particles in the atmosphere on the human body and the environment. As early as the second half of the 19th century, people had noticed the fine particles in the atmosphere and began to develop instruments for observation, resulting in aerosol science and aerosol measurement methods. In the 1960s, with the rapid development of microelectronics, laser, computer technology, modern chemistry and electron microscopy technology, the sampling and chemical analysis methods of particulate matter filter membranes suitable for atmospheric environment were developed, which greatly improved the precision and accuracy of the automatic monitoring instrument for particulate matter.
