The most effective way to get rid of formaldehyde is as follows:
Method 1: Open windows and ventilation method.
Window ventilation can promote indoor and outdoor air circulation and eliminate outdoor indoor pollution. This is a necessary step to remove formaldehyde after renovation. The advantage is that formaldehyde removal efficiency, saving money and environmental protection; the disadvantage is that it is difficult to remove formaldehyde y, and is greatly affected by the weather and temperature, can not guarantee that the window can be opened every time. Therefore, other methods are usually needed to help remove formaldehyde.
Method 2: physical adsorption method.
The best way to remove formaldehyde, activated charcoal this removal method can be said to belong to the cheaper and more practical methods, to know the use of this method it is characterized by physical adsorption, but also does not cause secondary pollution to the interior. The physical role of activated carbon deodorization, de-toxicity; and this product it is still without any chemical additives, there is no effect on the person.
Method three: photocatalyst decomposition method.
Photocatalyst is a catalyst. Under the action of light, it can decompose formaldehyde, toluene, TVOC and other harmful organic substances into harmless gas, so as to achieve the purpose of removing formaldehyde. The photocatalyst itself is a harmless substance and its decomposition product is harmless. It is a good formaldehyde removal material.
Introduction of formaldehyde
Formaldehyde, also known as anthranilic aldehyde, is an organic compound, the chemical formula is HCHO or CH2O, molecular weight 30.03. It is a colorless irritating gas, which is irritating to the eyes and nose of people. Relative density of gas is 1.067 (air=1), density of liquid is 0.815g/cm3 (-20℃). Melting point -92℃, boiling point -19.5℃. Soluble in water and ethanol. Concentration of the aqueous solution up to 55%, generally 35% -40%, usually 37%, called formaldehyde water, commonly known as formalin (formalin).
Formaldehyde has reducing properties, especially in alkaline solutions, reducing ability is stronger. Can burn, vapor and air to form explosive mixtures, explosive limit 7% -73% (volume), ignition point of about 300 ℃.
Formaldehyde can be produced by methanol in silver, copper and other metal-catalyzed dehydrogenation or oxidation, but also from the hydrocarbon oxidation products can be divided. It can be used as a raw material for phenolic resins, urea-formaldehyde resins, vinyl alcohol, urotropin, pentaerythritol, dyes, pesticides and disinfectants. Industrial formaldehyde solution generally contains 37% formaldehyde and 15% methanol, as a polymerization inhibitor, boiling point 101 ℃.
On October 27, 2017, the World Health Organization's International Agency for Research on Cancer published a list of carcinogens, formaldehyde is in the list of category 1 carcinogens.On July 23, 2019, formaldehyde was included in the list of toxic and hazardous water pollutants (first batch).