Inorganic-based adsorbent materials for the removal of gaseous pollutants

Various gaseous pollutants are released by industrial and anthropogenic activities, and the quest to remove these pollutants from the environment is gaining attention recently to ensure the safety of living creatures. Among various technologies, adsorption offers distinctive advantages due to its low cost, low energy consumption, and simplicity for remediation. Organic base materials, such as activated carbon, are widely used as adsorbent materials, whereas inorganic adsorbent materials prove their potential for replacement because of their abundance, low cost, and simple modification. Review papers on the use of inorganic adsorbent materials for the removal of gaseous pollutants are uncommon. As such, this review presents the progress achieved in utilizing various inorganic materials and their modified forms as adsorbent for gas phase depollution and their limitations. Various modification strategies for competitive adsorption and specified pollutions to achieve improved performance are discussed to realize their wide application in the adsorption technology. Fundamental studies should be performed to decrease the knowledge gaps on the utilization, regeneration, and modification of inorganic materials for wide application as adsorbent for gaseous pollutant removal.