Analysis of purification principle: the truth that merchants will not tell you

　　Analysis of purification principle: the truth that merchants will not tell you

　　With the last week left in September, everyone who was eagerly waiting for the long holiday of November was upset by an uninvited guest. A few days of haze weather made the blue sky disappear in the previous few days, but there were more on the street. Quite a lot of masks. The upcoming eleventh is the peak season for e-commerce promotions. Under the influence of smog, the air purifier market will reappear a frenzy of buying, but in the face of a wide range of products, do you really know which one to choose? What are the current mainstream purification technologies, and what are the differences between them?

　　To choose a suitable air purification product, we must first understand the types of indoor pollutants before we can prescribe the right medicine. At present, indoor pollution sources can be divided into 8 types: dust pollution, adsorbable particulate pollution, nicotine pollution, kitchen fume pollution, indoor odor, bacteria, viruses, and chemical pollution caused by decoration. Among them, the most common and most serious is the adsorbable particulate matter and chemical pollution.

　　2Activated carbon technology & negative oxygen ion technology

　　●Activated carbon technology: strong adsorption capacity

　　Activated carbon can be said to be the most common purification technology. I believe most people are not unfamiliar with it. Its super adsorption capacity is widely used in a variety of technical fields. It is mainly used in industrial fields such as medicine, chemical industry and food processing in China. Since the 1970s, my country has applied it to industrial wastewater treatment, and has gradually become one of the main methods of secondary or tertiary treatment of industrial wastewater. Its super adsorption capacity for impurities or pollution sources makes it the first choice for many air purification products.

　　Negative oxygen ion technology: Purify second-hand smoke pollution and effectively eliminate peculiar smell

　　Negative oxygen ion technology may sound mysterious, but it is actually a relatively common purification technology. Negative ions refer to the negatively charged ions in the air. We feel that the air is very fresh after a thunderstorm. In fact, it is the result of the increase in the content of negative ions in the air. At present, the technology of air negative ion generators is quite mature, and most air purifiers have applications.

　　Photocatalytic decomposition technology & molecular complex technology

　　●Photocatalyst catalytic decomposition technology: only "light" can catalyze

　　From the literal meaning, it is not difficult to see that this is a purification technology by catalytically decomposing pollutants. The reaction principle is not complicated: under the irradiation of light, the photocatalyst itself will not react, but it will promote the chemical reaction. It can use the energy of a specific wavelength light source to produce a catalytic effect (redox reaction), which excites the surrounding oxygen and water molecules into active free radicals, which can decompose most of the organic and some inorganic substances that are harmful to the human body.

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