Formaldehyde is a chemical substance that is harmful to the human body. The main harm is the stimulation of skin and mucous membranes. When formaldehyde reaches a certain concentration indoors, people feel uncomfortable. Formaldehyde concentration greater than 0.08m can cause eye irritation, eye itch, throat discomfort or pain, hoarseness, sneezing, chest tightness, asthma, dermatitis, etc. Formaldehyde content in newly decorated rooms is high, which is the main cause of many diseases.
China's environmental protection indicators with E formaldehyde emission standards. EO grade: perforation method less than 5mg/100g, dryer method 0.5mg/L; E1 grade: perforation method less than 4mg/100g, dryer 1.5mg/L; E2 grade: perforation method less 3mg/100g, dryer 5mg/L. The E1 level is the mandatory inspection standard issued by the state, that is, the environmental indicators that must be achieved. The E1 class is suitable for interior decoration, so the cabinet must meet the E1 level. If the cabinet of formaldehyde exceeds the standard, how to remove it?
The method of using activated carbon to adsorb
1. sorption can be divided into two main categories: physical adsorption and chemical adsorption. Activated carbon is mainly physical adsorption. It will not generate two pollution and is safe to use.
2. activated carbon is black powder or granular amorphous carbon, activated carbon main components in addition to carbon, there are oxygen, hydrogen and other elements.
3. activated carbon has developed pore structure and huge specific surface area, and the specific surface area of 1 g activated carbon can reach more than 1000 square meters, which is also the reason for the adsorption capacity of activated carbon.
4. activated carbon and bamboo charcoal belong to different products. Bamboo charcoal is made from bamboo after carbonization without activation and limited adsorption capacity.