There are two main sources of indoor air pollution, outdoor sources and indoor sources.
Release time:
2023-06-12
There are two main sources of indoor air pollution, outdoor sources and indoor sources. Outdoor sources include particulate matter, ozone, and industrial point source pollution from outdoor sources.
There are two main sources of indoor air pollution, outdoor sources and indoor sources. Outdoor sources include particulate matter, ozone, and industrial point source pollution from outdoor sources. At present, the most concerned is the pollution of fine particles (PM2.5). The annual average value of PM2.5 in the air quality guidelines set by the World Health Organization is 10 μg/m3, while the annual average value of PM2.5 in many cities in China is still above 50 μg/m3. In addition to particulate matter, ozone pollution should also cause widespread attention. Indoor sources are mainly divided into pollution caused by indoor decoration materials, such as formaldehyde, VOCs, radioactive pollutants, etc., as well as pollutants emitted by human activities, such as carbon dioxide, water vapor and VOCs. Human pollution is generally not mentioned, but in fact, the fresh air system is developed to solve the release of human pollutants.
There are many types of indoor air pollutants, which can be divided into particulate matter (mainly suspended particulate matter), gaseous pollutants (such as formaldehyde, VOCs, ozone, etc.), microorganisms, and radioactive substances (such as radon). The increase in the type or quantity of these pollutants will cause a series of uncomfortable symptoms, which are collectively referred to as "sick building syndrome". The symptoms include dizziness, headache, cough, sneezing, eye tears, and lack of energy. Wait, serious ones can also cause cancer, such as high concentrations of formaldehyde and benzene may cause leukemia.
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