Distinction between Adsorption and Absorption
Sorption
It is a process in which both adsorption and absorption take place simultaneously , the term sorption is simply used .
Positive and Negative Adsorption
When the concentration of the adsorbate is more on the surface of the adsorbent than in the bulk , it is called positive adsorption .
On the other hand , if the concentration of the adsorbate is less relative to its concentration in the bulk , it is called negative adsorption , e . g ., when a dilute solution of KCl is shaken with blood charcoal , it shows negative adsorption .
Distinction between Physisorption and Chemisorption