The ability of coconut shell activated carbon to retain suspended solids comes from the surface area provided by coconut shell activated carbon.
When the flow rate is low, the filter capacity of the unit mainly comes from the screening effect of coconut shell activated carbon, and when the flow rate is fast, the filtration capacity comes from the adsorption of the coconut shell activated carbon particles on the surface.
activated charcoal pellets bulk During the filtration process, the coconut shell activated carbon provides a larger surface area , The stronger the adhesion to suspended solids in water.
In the adsorption process, when the force between coconut shell activated carbon molecules and pollutant molecules is van der Waals force (or electrostatic attraction), it is called physical adsorption; when the force between coconut shell activated carbon molecules and pollutant molecules is a chemical bond It is called chemical adsorption.
The adsorption strength of physical adsorption is mainly related to the physical properties of coconut shell activated carbon, and basically has nothing to do with the chemical properties of coconut shell activated carbon.
Since van der Waals force is weak and has little effect on the structure of pollutant molecules, this force is the same as intermolecular cohesion, so physical adsorption can be compared to a condensation phenomenon. The chemical properties of the pollutants remain unchanged during physical adsorption.
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