Principle Of Activated Carbon Water Filtration

The adsorption capacity of activated carbon is related to the temperature of water and the quality of water. The higher the water temperature, the stronger the adsorption capacity of activated carbon; if the water temperature is higher than 30 ℃, the adsorption capacity reaches the limit, and there may be a gradual decrease. When the water quality is acidic, the adsorption capacity of activated carbon for anionic substances is relatively weakened; when the water quality is alkaline, the adsorption capacity of activated carbon for cationic substances is weakened. Therefore, the unstable pH of the water will also affect the adsorption capacity of activated carbon.

The adsorption principle of activated carbon is to form a balanced surface concentration on the surface of the particles, and then adsorb the impurities of organic substances into the activated carbon particles. The initial adsorption effect is very high. But over time, the adsorption capacity of activated carbon will be weakened to varying degrees, and the adsorption effect will also decrease. If the water quality in the aquarium is turbid and the organic content in the water is high, the activated carbon will soon lose its filtering function. Therefore, activated carbon should be cleaned or replaced regularly.

The size of the activated carbon particles also has an effect on the adsorption capacity. In general, the smaller the activated carbon particles, the larger the filtration area. Therefore, the total area of powdered activated carbon is larger, and the adsorption effect is better, but powdered activated carbon easily flows into the aquarium with water, which is difficult to control and rarely used. The granular activated carbon is not easy to flow due to the formation of particles, and impurities such as organic matter in the water are not easily blocked in the activated carbon filter layer. Its strong adsorption capacity is easy to carry and replace.

The adsorption capacity of activated carbon is proportional to the contact time with water. The longer the contact time, the better the filtered water quality. Note: The filtered water should slowly flow out of the filter layer. The new activated carbon should be washed clean before use, otherwise black ink will flow out. Before the activated carbon is loaded into the filter, a 2 to 3 cm thick sponge should be placed on the bottom and top to prevent the penetration of large particles such as algae. After the activated carbon is used for 2 to 3 months, it should be replaced if the filtration effect decreases The new activated carbon and sponge layer should also be replaced regularly.