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Physical and Chemical Adsorption and its Applications

Nagham Mahmood Aljamali, Radhiyah Abdul Baqi Aldujaili, Intisar Obaid Alfatlawi

Abstract


The content of the review requires extensive information about the excellence of its physical and chemical types, which is a superficial phenomenon that refers to the ability of solid or liquid materials to attract or pull molecules of gases or liquid solutions to their surface to come into direct contact with them, where the term adsorbents is used to denote those solid or liquid materials. The liquid used to adsorb gases or solutes, while the term adsorbate is used to denote the withdrawn particles; As an example, charcoal used in gas masks can be mentioned for its ability to remove toxic substances and impurities in the air. Adsorption is completely different from absorption, which refers to the process of distributing the substance equally over the entire mass of the substance, while this phenomenon occurs on the surface of the substance only, but if both phenomena occur at the same time, it is called sorption. Physical adsorption can occur at temperatures approaching or less than the boiling point of the adsorbent material when appropriate conditions are provided, while chemical adsorption occurs at temperatures exceeding the boiling point of the adsorbent material, meaning that temperature plays an important role in the occurrence of the adsorption process as it can Physical adsorption occurs at low temperature, followed by chemical adsorption at high temperatures.

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References


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