The soot particles emitted by catering sources are mainly PM2.5

Volatile organic pollutants (VOCs) in oil fume can also participate in atmospheric photochemical reactions, enhance atmospheric oxidation, and provide raw materials for the secondary generation of PM2.5; China is rich in cuisines, including Sichuan Hunan Cuisine, Huaiyang Cuisine and Cantonese Cuisine. Although VOCs in cooking fume of different cuisines are different, < P > but the main characteristic pollutants all contain propane, butane, isobutane, ethanol, formaldehyde acetaldehyde, acetone, acrolein and propionaldehyde, and the average emission concentration is above 1.11 μ g/m3. There are also some benzene series and halogenated hydrocarbons. Aromatic hydrocarbons such as benzene, aldehydes and ketones such as formaldehyde, etc., have the functions of disability, teratogenesis and carcinogenesis.

harm of PM2.5

1, environmental harm

The scattering and absorption of light by particulate matter in the atmosphere can significantly weaken the light signal and greatly reduce the effective line of sight, so PM2.5 will lead to the decline of urban man-made visibility, produce cloudy weather and cause the decline of air quality.

2. Harm to human body

Particles with a particle size between 2.5 microns and 11 microns can enter the upper respiratory tract, but some of them can be excreted through sputum, which is relatively harmless to human health; However, fine particles with a particle size of less than 2.5 microns are less than 1/21 of the thickness of human hair. < P > After being inhaled into human body, they will enter the bronchi, interfere with the gas exchange in the lungs, and cause diseases including asthma, bronchitis and cardiovascular diseases. These particles can also enter the blood through bronchi and alveoli, and harmful gases and heavy metals are dissolved in the blood, which is more harmful to human health.

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prevention and control

1. control the source and strengthen industrial dust control

industrial production process is an important source of fine particulate matter PM2.5, and the prevention and control of PM2.5 should start from the source, adopt comprehensive control strategies, improve the existing dust removal technology and equipment, and strictly control the dust pollution caused by industrial production.

2. Improve the energy consumption structure

Improve the energy utilization efficiency, change the energy consumption structure, vigorously develop clean energy such as nuclear power, hydropower, biogas and solar energy, increase the use of clean energy, increase the proportion of renewable energy in the primary energy consumption structure, and reduce pollutant emissions caused by the burning of fossil fuels such as coal and oil.

3. Controlling exhaust emissions

Improve automobile emission standards and control automobile exhaust emissions, especially those using diesel as fuel. It is also a common practice in big cities all over the world to actively develop bus-oriented urban transportation, promote the construction of public transportation infrastructure, and reduce residents' dependence on motor vehicles, thereby reducing fuel consumption and reducing air pollutants such as PM2.5 emitted by automobile exhaust.

Baidu Encyclopedia-PM 2.5 Pollution Prevention and Control

China News Network-Policy plus code technology supports soot control to enter the fast lane.