Can Activated Carbon Really Absorb Formaldehyde?

First of all, what brand of activated carbon is easy to say the answer: theoretically it is possible

But first of all, you have to buy it. The Internet is full of fake and shoddy products that are sub-charged. Most people like activated carbon do n’t really understand it. It ’s impossible to buy a product based on feelings and buying back. Identification. CCTV has exposed seven hot-selling activated carbons on the Internet. None of them are true. How to identify the authenticity of activated carbon?

In fact, it is very simple. Pour the activated carbon into clean water. If there are very fine bubbles, it must be true. If it is just a pool of black water, then it is basically a carbonized material.

Then we are looking, can activated carbon really absorb formaldehyde? Let the laboratory of Yunhang Jiaotong University do an experiment. In the closed experiment, release a certain amount of formaldehyde gas, put in activated carbon, and determine whether formaldehyde can absorb formaldehyde by measuring the change of formaldehyde concentration in the test box.

Look at the result:

In a cubic meter environment, the adsorption effect of activated carbon exceeding 100g is the best.

Therefore, the price of powdered activated carbon is required to adsorb formaldehyde. Often, the amount of small packages of hundreds of grams that we buy in stores or Taobao is simply not enough.

Explain the reason. As a relatively low molecular sieve, activated carbon has low adsorption selectivity and strong adsorption capacity. The result is that in addition to harmful substances, all kinds of carbon dioxide and water vapor are also adsorbed, and the adsorption will be saturated after a while, and the adsorption cannot be continued. Therefore, you need to prepare a large amount of activated carbon and replace it regularly.