ADSORPTION OF FLUORANTHENE ON SOIL AND LAVA - EFFECTS OF THE ORGANIC-CARBON CONTENTS OF ADSORBENTS AND TEMPERATURE

The sorption of fluoranthene on 4 soils and lava was studied without a ny cosolvent involved. The adsorption equilibrium was found to be esta blished within 1 hour for both soil and lava. Strong linear isotherms were found in all adsorption experiments and the distribution coeffici ents (K-d) were highly correlated with the organic carbon contents. lo g K-oc for all four soils was in good agreement with that predicted fr om the octanol-water partition coefficient (K-ow) and the aqueous solu bility (S-w) of fluoranthene. An inverse temperature dependence was ob served and the extent of adsorption decreased with the increase of tem perature was predictive of Delta H-s(c), which denotes the enthalpic c ontribution to excess free energy of aqueous solution.