Before, when owners buy car accessories, most of the emphasis on comfort and aesthetics of the product, but in recent years, this situation is quietly changing, and charcoal package because of its claim to own the very strong adsorption capacity to the formaldehyde and other harmful gases of the air in the car, it is greatly popular with car owners.
Now in the market, a popular car charcoal package is called a green product without any toxicity and side effects, and does not produce secondary pollution, is it? Reporters have visited Auto Services Ltd, the sales staff said the charcoal bag for a variety of materials, the release of formaldehyde, benzene, ammonia and other gas harmful to human health has super role of adsorption and purification, it has the apparent efficacy on a variety of odor removal but does not produce secondary pollution. After buying a new car, many owners will buy the charcoal bag to clean the car smell, let the car air health, and environmental protection. But when the reporter asked the sales staff charcoal composition and environmental principles, most of them answered ambiguously.
What is charcoal? The so-called charcoal’s raw materials are derived from bamboo for more than three years, made by the distillation of high temperature anaerobic, due to fresh charcoal has a certain amount of activated carbon, which can absorb a variety of suspended solids in the air like hydro seepage in the sand, formaldehyde, water, benzene, phenol, and other ingredients can be infiltrated these channels inside of the charcoal.
So, can the charcoal package really absorb formaldehyde in order to solve the pollution problems of the car inside? Professors think that fresh charcoal alone is not a fundamental solution to the formaldehyde pollution problems in the car. Because the release of formaldehyde in the car is not a short-term local and point-like, but unorganized, broad, long-term release. And the release of formaldehyde in the car also depends on the materials used inside the car. Within the sealed interior space, the long-term average concentrations of formaldehyde and other pollutants depends on many complex relationships between the release rate of non-point source pollutants and fresh charcoal package punctate adsorption rate, so fresh charcoal can just open the sealed package after a period of time with the ability of the adsorption of formaldehyde and other organic matter.
In addition, activated carbon’s adsorption for formaldehyde is not stable, not even as a close combination with the water molecules. Speaking simply, if the indoor water vapor is much, it can also be adsorbed on the charcoal to squeeze down formaldehyde. Thus, in addition to absorbing formaldehyde in the channel, charcoal has no special mechanism to limit their freedom. As the water can evaporate from sand, formaldehyde can also evaporate from the charcoal.