Which method can be used to control gaseous pollutants?

Adsorption is an effective method for controlling gaseous pollutants because it involves the adhesion of gas molecules onto the surface of solid materials, known as adsorbents, such as activated carbon, zeolites, or silica gels. This process captures contaminants from the air or gas stream, thus reducing their concentration and preventing their release into the environment. The efficiency of adsorption is influenced by factors such as the nature of the adsorbent, temperature, pressure, and the specific characteristics of the gaseous pollutants.

In contrast, filtration primarily pertains to removing particulate matter from fluids and may not effectively target gases, whereas absorption involves the incorporation of a gas into a liquid solution, which can be more complex and may not capture all gaseous pollutants. Decomposition generally refers to breaking down substances, which is not a practical approach for managing gaseous pollutants directly. Thus, adsorption stands out as the most suitable and widely used method for controlling gaseous pollutants in various applications.