There are many kinds of activated carbon used in our daily life. Especially activated carbon for water treatment or called powder activated carbon for drinking water. Do you know element that affects adsorption performance of activated carbon?
The nature of activated carbon adsorbent
The larger the surface area, the stronger the adsorption capacity. The activated carbon is a non-polar molecule, and it is easy to adsorb non-polar or very polar adsorbate; the size of activated carbon adsorbent particles, the structure and distribution of pores, and surface chemical properties, etc. It also has a great influence on adsorption.
It depends on its solubility, surface free energy, polarity, size and unsaturation of adsorbate molecules, concentration of attached substances, and the like.
Activated carbon generally has a higher adsorption rate in acidic solutions than in alkaline solutions.
The pH value will influence the state and solubility of the adsorbate in the water, thus affecting the adsorption effect.
When multiple adsorbates are coexisted, the adsorption capacity of activated carbon for a certain adsorbent is poorer than that of adsorbent only when it is contained.
The effect of temperature on the adsorption of activated carbon is small.
It should be ensured that the activated carbon has a certain contact time with the adsorbent so that the adsorption is close to equilibrium and the adsorption capacity is fully utilized.