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Indoor pollution is serious in winter, how to protect family health?
Oct 23, 2018

In  winter, people's indoor activities increase, and indoor ventilation and  ventilation opportunities are reduced. The resulting indoor  environmental pollution is serious to the human body. Due  to the long-term closing of doors and windows, excessive intake of  harmful gases in the air can cause harm to the human body in all  aspects. Data show that about 68% of human diseases are related to room pollution. One of the most infamous "invisible killers" is formaldehyde.


Formaldehyde  is widely used in chemical fiber carpets, clothing, paints, cosmetics,  detergents, insecticides, disinfectants, preservatives, printing inks,  paper, textile fibers and other chemical products. Of course, there are also home improvement items. For example, the production of new furniture, wall and floor decoration. Formaldehyde  is ubiquitous in our lives, and when formaldehyde is inhaled into the  lungs, it can enter the bloodstream and cause harm to the human body,  such as causing baby distortion and carcinogenesis.

Formaldehyde in paints and latex paints is relatively easy to disperse because it adheres to the surface of the wall. However,  formaldehyde emissions from wood building materials and furniture  adhesives are very slow, up to 15 years! Decoration pollution has become  the largest source of indoor air pollution, and the formaldehyde  release cycle lasts for 5-15 years. The number of deaths caused by indoor pollution in China is more than 111,000 per year, of which 35% are children. It is about 304 people a day, which means that every 5 minutes, one person dies because of interior decoration pollution.

So how can I remove formaldehyde? Here I introduce you to several methods:


1. Activated carbon adsorption method

Solid  activated carbon has many characteristics of pores, and has strong  adsorption and decomposition effects on harmful substances such as  formaldehyde. The smaller the particles of activated carbon, the better  the adsorption effect. However, depending on the size of the space, the amount of activated carbon placed varies. In addition, the activated carbon needs to be replaced after it has been adsorbed to a certain extent. The effect of activated carbon is good, but like other methods, it does not completely remove formaldehyde from the air.


2. Purifier treatment

At  present, air purifiers on the market are classified into negative ion  type, ozone type, filter adsorption type, static electricity type and  photocatalyst type. Different air purifiers have different  working principles. For example, negative ion type is to purify indoor  air by generating negative ions, decomposing odor in the air and  attached smoke. However, air purifiers are generally only effective when used in a closed space. If the air purifier is used in the case of opening a window, it is not only ineffective but also wastes electricity.


3. Chemical purification method

At  present, there are two kinds of formaldehyde trapping agents on the  market, one is to purify the air by neutralizing formaldehyde and  generating harmless substances; the other is to purify the air by  blocking formaldehyde and preventing the volatilization of formaldehyde. At  present, some people think that formaldehyde blocking agent completely  limits the volatilization of formaldehyde. In fact, formaldehyde  blocking agent can not completely block formaldehyde, and can only  reduce the release of formaldehyde.


4. Photocatalyst decomposition method

The  catalyst in the photocatalyst generates negative ions and hydroxyl  radicals with oxygen and moisture in the air under the stimulation of  light, can oxidize and decompose various organic pollutants and  inorganic pollutants, and finally degrade into carbon dioxide, water and  corresponding acid. Such as harmless substances, so as to achieve the role of decomposing pollutants and purifying the air. As  a new type of material, photocatalyst does not cause secondary  pollution in theory. However, since various manufacturers produce  photocatalysts with different processes, it cannot be said that  photocatalyst will not cause secondary pollution. In addition, the use of photocatalysts is complicated and generally used by specialized service companies.


5. Plant absorption method

Plants  have a strong ability to absorb formaldehyde, such as cactus, spider  plant, aloe vera, ivy, iron tree, chrysanthemum and so on. The absorption of formaldehyde by plants can only play an auxiliary role in the process of purifying the air. If the formaldehyde content in the air is too high, it may even cause the death of the plant itself. In  general, large-leaf and vanilla plants have better effects on  formaldehyde absorption, such as spider plants and tiger-tail orchids.