Ozone (O3), also known as peroxide, is an allotrope of oxygen (O2). It is a light blue gas at room temperature and has a special smell. Ozone is mainly distributed in the stratospheric atmosphere at the height of 10~50km, and the maximum value is between 20~30km. Under normal temperature and pressure, it has poor stability and can be decomposed into oxygen by itself. Ozone smells of grass. A small amount of inhalation is beneficial to human health, while excessive inhalation is harmful to human health. Nonflammable, pure. Oxygen can be changed into ozone by electric shock.
Extended data:
Harm of ozone
I ozone pollution in the troposphere
About 90% of global ozone is concentrated in the stratosphere, and another 10% is in the troposphere. Ozone is the most critical component in the stratospheric natural atmosphere, and the peak ozone concentration appears at 10 ~ 25 km from the ground. Ozone in the stratosphere can absorb short-wave ultraviolet radiation, reduce the harm to human beings, animals and plants, and is the umbrella of life materials on the earth. The existence of tropospheric ozone will not only affect atmospheric oxidation, but also participate in the chemical transformation process of various atmospheric pollutants due to the strong oxidation of ozone, which will do harm to human beings, ecosystems and urban construction. ?
Second, the harm to human body
According to the National Ambient Air Quality Standard (NAAQS), the acceptable limit concentration of ozone in one hour is 260 μ g/m3. Exercise 1h in 320μg/m3 ozone environment will cause cough, dyspnea and decreased lung function.
Ozone can also participate in the protein reaction of unsaturated fatty acids and amino groups in organisms, causing people who have been directly exposed to high-concentration ozone for a long time to have symptoms such as fatigue, cough, chest tightness and chest pain, skin wrinkling, nausea and headache, rapid pulse, memory loss and vision loss.
Third, other hazards.
Ozone can also make the leaves of plants yellow or even wither, causing harm to plants and even reducing the yield and economic benefits of agricultural and forestry plants.
Ozone can quickly react with organic compounds (including rubber, styrene, unsaturated fatty acids and their esters) containing unsaturated carbon-carbon bonds in indoor building materials (such as latex paint), household articles (such as cork appliances and carpets), silk, cotton, cellulose acetate, nylon and polyester, thus causing dye fading, photo image layer fading and tire aging.
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