Sorbent

A sorbent is a material that either absorbs or adsorbs liquids or gases.[1]

Cross-section of a gas mask filter, with sorbent material visible

Examples

Sorbents come in various forms and materials, including:

  • Similar to molecular sieve material, a sorbent may function via adsorption, attracting molecules to its surface. These are typically supplied in pellets (1mm to 2mm diameter, approximately 5mm length) or grains (~1mm), occasionally as beads up to 5mm in diameter, and are commonly made from aluminium oxide featuring a porous structure.
  • Materials with a high affinity for absorbing other materials, such as:

Method of action

In instances of chemical spills where sorbents are utilized, oil-absorbent pads should exhibit oleophilic (oil-attracting) and hydrophobic (water-repelling) properties. Sorbent materials operate primarily through adsorption, and less frequently, by absorption. Both mechanisms involve the incorporation of the oil or another liquid into the material's structure, though the methods of incorporation differ.[2]

References

  1. "Definition of 'sorbent'". collinsdictionary. HarperCollins Publishers.
  2. "What are Oil Absorbent Pads Made Of? Use of Absorbent Materials in Oil Spill Response". Park Non Woven - Manufacturer of Non Woven Fabric. 2021-06-29. Retrieved 2021-11-22.


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