The activated charcoal uses in adsorbing the critical temperature high material. the for instance water and the chlorine critical temperature respectively is 373.91 and 144, but nitrogen and oxygen critical temperature respectively be - 1470 and - 117.57, therefore the activated charcoal adsorbs the chlorine and the water first.
 may believe generally that I mean general, the colored material first adsorb, therefore we use the activated charcoal to decolorize.
 uses, generally is joins the activated charcoal has the impurity liquid, if chemical substance's nature permission boils boils, after period of time, branches out the activated charcoal.
  The separation method is the filtration generally, but if is quite big with the pellet, the crisp broken quite small activated charcoal, may fish directly with the ladle and so on thing.because if
 filters, on the filter paper will have the product, will cut the production rate.