Page 46 - Partition & Adsorption of Organic Contaminants in Environmental Systems
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CONCENTRATION DEPENDENCE OF PARTITION COEFFICIENT 37
C s or C p (weight %)
0 1
Relative Concentration, C /S w
w
Figure 3.1 Linear isotherm for the weak partition of a solute from water into an
organic solvent or a polymer. Here the highest C s or C p value is presumably less than
10% by weight.
C s or C p (weight %)
0 1
Relative Concentration, C /S w
w
Figure 3.2 Concave-upward isotherm for the strong partition of a solute into an
organic solvent or a polymer. Here the highest C s or C p value is presumably much
greater than 10 to 20% by weight.
similar to that of the solute and hence becomes more compatible with the
solute. As a result, g* s or c H decreases progressively with increasing C s.This
nonlinear effect would not be remarkable, since g* s or c H is not expected to
change sharply with concentration, as solutes highly soluble in a solvent (or
