In batch type contact operation, the quantity of adsorbent is
mixed continuously with a specific volume of wastewater until the
pollutant in that solution has been decreased to a desirable level.
The adsorbent is then removed and discarded or regenerated for use
with another volume of solution.
Adsorption from solution is customarily conducted either as a
column or as a batch operation In the former instance the solution
is allowed to percolate through a column usually held in a vertical
position such as is the common practice with ion exchange
columns.