Aromatic bags that make the room full of lavender fragrance, activated carbon bags that are placed in the refrigerator to remove odor, and spice bags that are placed in the wardrobe to prevent insects ... All kinds of deodorizing bags appear in every corner of our lives.

Decorated houses usually contain excessive formaldehyde. Using air filters, placing potted plants and adsorption bags are good ways for people to eliminate the harm of formaldehyde. As a kind of substance generally applicable to daily life, bamboo charcoal and activated carbon deodorizing package are widely welcomed by consumers.

However, can the deodorizer really absorb formaldehyde as it is described?

At present, there are many kinds of deodorizing packages on the market, among which bamboo charcoal and activated carbon deodorizing packages are the most common.

In Sun Palace Beijing Hualian Supermarket, the sales of bamboo charcoal and activated carbon deodorizing packages are in good condition. In Zhongguancun Carrefour, a 14.9 yuan bamboo charcoal deodorizing bag attracted many consumers to buy. Low price and good reputation are important reasons why consumers choose to buy deodorizing bags.

It is worth noting that most deodorizing packages are marked with the words "adsorbed formaldehyde" in addition to adsorbing moisture and odor. Will bamboo charcoal deodorizing bag adsorb formaldehyde? The promoter of a brand of bamboo charcoal deodorizing package in Carrefour, Zhongguancun, said that what is written on the label should have what effect. "Of course, the main function is to absorb the smell. For example, this can be put in the refrigerator to absorb the odor, and it will take about 15 days to take it out and expose it to the sun, so it can be used again." A promoter pointed to his product and introduced it.

After a reporter from a large shopping website entered "deodorizing package", it was observed that in nearly 38,000 search results, almost all merchants marked "in addition to formaldehyde", "formaldehyde adsorption and other harmful substances" and "decoration deodorizing package" in their descriptions of deodorizing packages. The prices of these deodorizing packages range from 0.3 yuan to 980 yuan, and retail and wholesale coexist, and the transaction volume is huge.

When the reporter asked the store in the name of consultation how effective the deodorizing bag was in absorbing formaldehyde, the store owner said, "Don't worry at all, just use the deodorizing bag." When the reporter asked to prove whether the deodorizing package had relevant testing standards, the owner only further emphasized the powerful deodorizing function of the product. It is difficult to judge the effect of these deodorizing package desiccants on absorbing formaldehyde.

A deodorizing bag with a high sales volume in Amazon clearly showed its adsorption effect in the introduction, and attached a certificate of passing the national building materials testing center on the package. According to the sales staff of the brand, it has been specially improved for formaldehyde absorption, using coconut shell activated carbon for adsorption, and the formaldehyde removal rate is 94.7% within 24 hours of the adsorption effect. "We can't guarantee that it will reach 94%, but the absorption effect is still very obvious after a day or two." The brand sales staff introduced.

"From now on, if you use bamboo charcoal and charcoal deodorizing bags, their adsorption effect is almost zero." An engineer surnamed Liu from Beijing Air Quality Testing Center believes that deodorizing bags with bamboo charcoal and charcoal as the main materials do not have the ability to adsorb formaldehyde. "Their adsorption ability is poor, not to mention formaldehyde." He added. The new "Determination Method of Purification Effect of Indoor Air Purification Products" will be officially implemented on September 1st this year. During the replacement period of new and old standards, there is no necessary detection standard for indoor air and environmental protection, especially for the efficacy of absorbing formaldehyde. Engineer Liu also mentioned that no enterprise sent its own deodorizing package products for inspection, and the testing center could not judge whether formaldehyde was adsorbed or not.

Guangsheng Song, director of the National Indoor Environment and Indoor Environmental Protection Products Quality Inspection Center, said that using activated carbon to adsorb some gases is a passive absorption, which will tend to be saturated after a period of adsorption. Bamboo charcoal and activated carbon have a certain adsorption effect. "To adsorb formaldehyde, generally modified activated carbon can adsorb it, but this modified activated carbon is more common in air purifiers." Guangsheng Song said that the difference between modified activated carbon and ordinary activated carbon is that the substances attached to its surface can react chemically with formaldehyde, so as to eliminate or neutralize formaldehyde. Only this kind of activated carbon can be called carbon capable of adsorbing formaldehyde. "The market for these things, especially bamboo charcoal deodorizing packages, is quite chaotic, and the efficacy of most products has been exaggerated." Guangsheng Song said.