Will the activated carbon filter "vomit" pollutants after being used for a long time?

After using the activated carbon filter for a period of time, there is indeed the possibility of "vomiting" pollutants, but this situation requires specific conditions to occur. The adsorption capacity of activated carbon is limited. When the internal micropores are filled with pollutants, when encountering high temperature, high humidity environment or sudden drop in external concentration, some of the adsorbed formaldehyde, benzene and other substances may be released again, causing secondary pollution.

This phenomenon is more common in inferior filter elements or products that have been used for an extended period of time. For example, the temperature in the car rises in summer, or the air purifier has not replaced the filter element for a long time, which may cause the escape of adsorbed substances. However, high-quality activated carbon filters generally do not have obvious vomiting during the normal use cycle (usually 3-6 months), especially specially treated modified activated carbon, which can lock pollutants more stably.

To avoid this problem, it is recommended to replace the filter element regularly and choose products with strong adsorption performance and stable structure (such as coconut shell activated carbon). In the future, with the application of catalytic decomposition technology, activated carbon filters will be safer and more efficient, and completely solve the hidden dangers of "vomiting".