Zeolite works differently.
Zeolite is a crystalline mineral made from silicon, aluminum, and oxygen. These atoms form a very organized lattice structure with tiny channels and openings throughout it.
When aluminum replaces some of the silicon in that structure, the zeolite develops a negative charge. To balance that charge, it holds onto positively charged minerals like
sodium, potassium, or calcium.
This matters because zeolite does more than just trap things on its surface. It can also exchange ions, meaning it can swap the minerals it holds for other positively charged substances around it.
What zeolite is best at?
Because of that lattice structure and charge, zeolite is better suited for binding certain positively charged metals and other charged compounds.
In simple terms, zeolite makes more sense for certain metals, while activated charcoal is broader and better known for grabbing a wider range of compounds in the gut.
That is the real difference:
Charcoal = broad porous carbon surface
Zeolite = charged mineral lattice better suited for certain metals
Both can bind unwanted compounds. They just do it in different ways.