Types of activated carbon in water purifier and common sterilization methods

At present, activated carbon is one of the most widely used filter elements in the water purifier market. What are the types of activated carbon in the filter elements of domestic water purifiers?

1. Powdered activated carbon

As the name implies, it means that the activated carbon is ground to powder shape. The specific surface area of this kind of powdered activated carbon is large, the pore diameter is hollow, there are many small holes, and the size of the holes is uniform, so that it has strong adsorption capacity. However, due to the advanced technology, only a few water purifiers of manufacturers are in use at present.

2. Granular activated carbon

Granular activated carbon is to make activated carbon into granular size activated carbon. It is used in the filter element of water purifier. Because of its particle shape, the specific surface area of adsorbed pollutants is small, so the adsorption capacity of the filter element made of this kind of activated carbon is low. For example, some filter elements of water purifier fill granular activated carbon in the shape of column, which is easy to form water path under the impact of water pressure, and water and activated carbon are not fully contacted, so that the outflow of water purification is not complete, and the activated carbon in the middle of the column is easy to saturate in advance, so that the carbon close to the column does not work, resulting in poor taste of water.

3. Sintered activated carbon

The activated carbon is mixed with colloid and sintered in a column shape. The pore size of the activated carbon is reduced after sintering, which greatly reduces the adsorption capacity of the activated carbon. However, at present, all the activated carbon filter elements of the reverse osmosis water purifier use this kind of activated carbon.

4. Compressed activated carbon

This kind of activated carbon is based on the powder activated carbon, which is compressed as a column after doping a small amount of glue into the powder activated carbon. This kind of activated carbon is the same as the sintered activated carbon, because the pore size of the compressed activated carbon is reduced, so the adsorption capacity is greatly reduced.

The commonly used disinfection methods for sterilization and bacteriostasis of household water purifier are as follows:

1. Ozone disinfection: the process of ozone changing into oxygen in water will produce discharge reaction, which can kill bacteria in water and break the molecular chain of some chemicals, but its two disadvantages are easy to be faucet corrosion and high failure rate.

2. UV antivirus: the 257.3nm long band of UV can kill bacteria instantly, but its disadvantage is poor penetration, and after a period of use, its UV effect will be weakened.