Removal of polychlorinated biphenyls from water by sorption onto polymers
2007
Skláršová, B., Food Research Institute, Bratislava (Slovak Republic) | Šimko, P., Food Research Institute, Bratislava (Slovak Republic) | Šimon, P., Food Research Institute, Bratislava (Slovak Republic) | Drobná, B., Food Research Institute, Bratislava (Slovak Republic)
Water and rapeseed oil were spiked with six polychlorinated biphenyls (PCBs), filled into polyethylene terephtalate (PET) as well as polystyrene (PS) cylindrical shape receptacles and PCB concentrations were followed within 72 h. As found, PCB concentration in water decreased considerably due to the sorption of PCBs onto walls of the receptacles. From the treatment of experimental data, diffusion and the distribution coefficients were obtained for all studied compounds. Comparing the area of contact surfaces of the receptacles and the calculated area of PCB films composed of PCB molecules it was derived that the PET surface was occupied by 30.4% while the PS surface by 52.7% of PCB film, what indicate better applicability of PS for removal of PCBs from water in comparison to PET. The results show that the mechanism of PCB removal can be characterised as a monolayer adsorption taking place on surfaces of the polymers. Regarding rapeseed oil it was found that PET and PS are inappropriate materials for the removal of PCBs from this non-polar matrix, because no distinct PCB adsorption was observed in this case.
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