Lowering of concentration of polycyclic aromatic hydrocarbons in liquid media by sorption into polyethylene terephtalate - - a model study

• Published in: European food research & technology Vol. 219; no. 3; pp. 273 - 276
• Main Authors: Simko, P, Simon, P, Belajova, E
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.08.2004; Berlin Springer Nature B.V
• Subjects: adsorption; Biological and medical sciences; chemical concentration; diffusion; Diffusion coefficient; equations; Food industries; food packaging; Fundamental and applied biological sciences. Psychology; jars; kinetics; Liquid chromatography; packaging materials migration; plastics; Polycyclic aromatic hydrocarbons; Polyethylene; polyethylene terephtalate; Rapeseed oil; solutions; surface interactions; water; Sorption; Liquid; Polyethylene; Adsorption; Hydrocarbon; Polycyclic aromatic hydrocarbons; Polyethylene terephtalate; Model study; Concentration
• ISSN: 1438-2377; 1438-2385
• DOI: 10.1007/s00217-004-0946-x

Rapeseed oil and water were spiked with polycyclic aromatic hydrocarbon (PAH) solutions at the total levels of 955.1 and 711.4 μg kg^sup -1^, respectively, filled into polyethylene terephtalate (PET) cylindrical receptacles and the PAH concentrations in both liquid media followed for more than 90 h by HPLC. During this time, the PAH concentrations decreased by 315.1 in oil and 212.7 μg kg^sup -1^ in water due to an interaction of PAHs with PET. Using a modified kinetic equation, the diffusion coefficients for PAHs in both liquid media were determined. Values of the diffusion coefficients obtained indicate that the polarity of medium did not affect the rate of PAH removal. Calculation of the area occupied by a PAH molecule on the PET surface suggests that either the multilayer adsorption or the diffusion of PAHs into PET bulk came into account as the decisive factor bringing about the decrease of PAH concentrations in both media.[PUBLICATION ABSTRACT]