KINETICS OF SUNFLOWER OIL CONTAMINATION WITH POLYCYCLIC AROMATIC-HYDROCARBONS FROM CONTAMINATED RECYCLED LOW-DENSITY POLYETHYLENE FILM

The possibility of food contamination with polycyclic aromatic hydroca rbons (PAHs) by rediffusion from polyethylene film made of contaminate d recycled polyethylene (PE) was tested. PE was contaminated with PAHs by diffusion from water medium spiked with fluoranthene (F1), pyrene (Py), and benzo(a)pyrene (BaP). The PE was recycled by heating at 150 degrees C for 10 min. The recycling process did not affect the PAH con centration in PE. From the recycled PE, a PE film was made and rediffu sion of PAHs from the PE film into a sunflower oil was followed for 60 0 h at 24 degrees C. Diffusion of PAHs into the oil demonstrated the p otential of PAH-contaminated PE as a source of contamination of food. The PAH concentration in vegetable oil was linearly dependent on the s quare root of the storage time. A kinetic equation for PAH rediffusion from PE film into the oil is proposed.