Zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents and catalysts. Pseudoboehmite is used as binder for FCC catalysts and adsorbents. Zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents. These cells were micron-sized and contained cell, enzymes, hemoglobin, magnetic materials, adsorbents and proteins. Chitosan is among the biological adsorbents used for heavy metals removal without negative environmental impacts. Many environmental concerns over liquid amines can be eliminated by the use of solid adsorbents. The customization of adsorbents makes them a potentially attractive alternative to absorption. Iron oxide-hydroxide nanoparticles have been studied as possible adsorbents for lead removal from aquatic media. Nanoscale adsorbents being the main alleviator for many air pollution difficulties. Currently, researchers are developing new adsorbents with higher adsorption ratio to optimize this process. Typical adsorbents are activated carbon, silica gel, alumina, resin and zeolite. Metal-organic frameworks (MOFs) are promising adsorbents.