2. Devil on Earth: Although ozone plays an important role in protecting human beings and the environment in the stratosphere, if its concentration in the troposphere increases, it will have harmful effects on human health. Ozone can irritate eyes and respiratory tract, and also affect lung function. Higher concentrations of ozone are also harmful to plants.
At room temperature, ozone is a light blue gas with 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.
Extended data
Application status of ozone;
1, and its application in industrial sewage, domestic sewage and hospital sewage.
Almost all industries use corona discharge to produce ozone. The ozone generated in this way is suitable for the pretreatment of sewage containing pollutants such as sodium alkylbenzene sulfonate, tar, COD, BOD, sludge and ammonia nitrogen. It is also suitable for treating sewage containing Fe2+, Mn2+, cyanide, phenol, hydrophilic dyes and bacteria. ?
Due to the increasing shortage of water resources, industrial and urban domestic sewage is often treated and reused, which requires improving the sewage treatment standards. Advanced treatment of water with ozone can remove all kinds of impurities in water, thus reaching the reuse standard.
2. Health care
Internationally, ozone has many medical uses, such as air disinfection in wards and operating rooms, disinfection of medical instruments with ozone water, treatment of dental diseases (oral surgery and keeping oral cavity sterile), treatment of cancer with ozone combined with radiotherapy, treatment of gynecological diseases with ozone water, and treatment of fistula, hemorrhoids and varicose veins with ozone gas injection.
In terms of health care, strong air (air with low ozone concentration) is popular in Japan and Taiwan Province Province, and ozone water is used to shower the body for sterilization and beauty. Modern popular high-tech beauty, including the application of ozone for beauty.
3. Food processing and preservation
The application of ozone in food industry is more and more common. 1904, Europe used ozone to keep milk, meat products, cheese, protein and other foods fresh. In the late 1930s, ozone generators were installed in 80% frozen egg banks in the United States.
After World War II, Europe, America, Japan and other countries used ozone in storage, manufacturing, transportation and other aspects in the preservation of food, fruits and vegetables. In modern China, some food industry manufacturers have begun to use ozone machines to disinfect production lines and products efficiently and quickly, and at the same time, strictly disinfect the air in production workshops.
4. Agriculture
Ozone is a colorless gas with a slight odor. When dissolved in water, it will become a strong oxidant and have a strong killing effect on living cells. Through the ozone generator, the oxygen in the air can be converted into ozone under the ionization of high-voltage electricity and high-frequency electricity, and then used for production. Using ozone generator, the author conducted an experimental demonstration of using ozone to control vegetable diseases and insect pests in greenhouse around Xi 'an, and achieved good results.
Baidu encyclopedia-ozone