Onion can not remove formaldehyde at all, it does not have this effect.

Formaldehyde is very harmful to the human body, long-term formaldehyde in the environment will cause many diseases. Onions are not able to remove formaldehyde. The use of onions in addition to formaldehyde method is wrong, is futile. To effectively remove formaldehyde also need to use the correct method, such as window ventilation, activated carbon adsorption, photocatalyst purification.

Methods of removing formaldehyde

1, ventilation, there must be a large amount of air exchange, to be ventilated for a long time, in order to remove formaldehyde at almost no cost.

2, activated carbon adsorption, is also a more commonly used method in life, the cost is lower, but to regularly replace the activated carbon.

3, plant adsorption method, in the beauty of the interior at the same time, play the role of adsorption of formaldehyde, such as green, hanging orchids, ivy, etc., but the effect is relatively poor.

4, the use of air purifiers. In addition, there are biological enzymes, photocatalysts and other new methods of removing formaldehyde.

5, photocatalyst. Photocatalyst, also known as photocatalyst, first originated in Japan. Photocatalysts are mainly made of nanoscale titanium dioxide solution, in the spray construction technology to spray this kind of liquid on the surface of the substrate. In this way, under the condition of light, the substrate and the moisture in the air will have a catalytic reaction, so that the oxidative decomposition can be played, prompting the generation of reactive oxygen and hydroxyl. Through the ion's strong redox ability, the formaldehyde and other harmful substances decomposition, the decomposition of the product is carbon dioxide and water.