A water solution with a volume of 2m3 contains 0.3kg of phenol/m3 of solution. Bliss solution is treated in two stages with 2kg of fresh activated carbon in each. Suppose that in the In the first stage, 1% of the initial volume of solution is adsorbed.

a) Determine the final values at equilibrium and the total percentage of phenol that is extracted. b) Compare the previous result with the extraction carried out with a single stage of 4kg of coal Again, justify your answer.