Sorption of selected polycyclic aromatic hydrocarbons on soils in oil-contaminated systems.
The adsorption and desorption behaviour of selected polycyclic aromatic hydrocarbons (PAHs) on different soils was investigated by static and dynamic methods. On the basis of a system including the four phases of soil, water, oil adsorbed and oil in emulsion, a model for the description of the adsorption behaviour in the presence of oil was developed. In systems without oil a similar partitioning behaviour in the batch and column experiments was observed for all PAHs. Thus the distribution coefficients can be calculated from the octanol/water coefficient of the aromatic compounds and the organic carbon content of the soils. The presence of a lipophilic phase had a significant influence on the sorption of the PAHs, usually resulting in a drastic decrease of adsorption with increasing oil content in the system. For the oil-contaminated system the modelling of the adsorption behaviour enabled a more detailed interpretation of the experimental observations as well as the calculation of the sorption behaviour for the PAHs from characteristic parameters of the components involved.
Walter
T
T
Forschungszentrum Karlsruhe GmbH (FZK), Institut für Technische Chemie (ITC-CPV), Germany. thomas.walter@ifia.fzk.de
Ederer
H J
HJ
Först
C
C
Stieglitz
L
L
D000327:Adsorption; D004784:Environmental Monitoring / Q000379:methods; D006801:Humans; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry*; D012987:Soil; D012989:Soil Pollutants
D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants