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11
CH3041
ORGANIC ADSORPTION
• Lipophilic substances accumulate on
humic substances - “like attracts like”.
humic substances - “like attracts like”.
• Cationic organics adsorb
on clays and
humic substances through ion exchange.
humic substances through ion exchange.
• The distribution coefficient Kdist is used to
partition the solute (organic) between the solution and the sorbed state (stuck on the
solid):
Kdist = [is] / [iw]
partition the solute (organic) between the solution and the sorbed state (stuck on the
solid):
Kdist = [is] / [iw]
[is] = the equilibrium concentration sorbed
mol(i) / kg(solid) ( or {g(i) / g(solid)} )
mol(i) / kg(solid) ( or {g(i) / g(solid)} )
[iw] = the concentration
of i in
water mol(i)
/ L
