sorption

from WordNet (r) 3.0 (2006)

sorption
    n 1: the process in which one substance takes up or holds
         another (by either absorption or adsorption)

from Moby Thesaurus II by Grady Ward, 1.0

21 Moby Thesaurus words for "sorption":
      absorbency, absorbent, absorption, adsorbent, adsorption,
      assimilation, blotter, blotting, blotting paper, chemisorption,
      chemosorption, digestion, endosmosis, engrossment, exosmosis,
      infiltration, osmosis, percolation, seepage, sponge, sponging