PET is the most widespread material (~80%) in use for mineral water bottling. This study is focused on the possibility that pollutants in the environment cross the PET and pollute the water. Mineral water PET-bottles were exposed in closed environment at chloroform, trichloroethylene and tetrachloroethylene vapors and analyzed after 10, 20 and 30 days. The results suggest that: a) The exposition at organo-halogenated compounds produces a water contamination by migration of contaminants trough the PET; b) The 0.5 lt bottles have an higher contamination than 1.5 lt bottles; this phenomenon can be explained by the different contact surface area between water and PET material. In 0.5 lt bottles this contact area is bigger; c) In sparkling waters, the penetration of the environmental contaminants for the high CO2 concentration and for the internal pressure appears limited; d) The bottles with a PET greater thickness showed a lower contamination; e) The migration mechanism of contaminants and new technologies to reduce the PET permeability are still to be investigated.

Contaminazione di acque minerali imbottigliate in PET conservate in ambiente inquinato da composti organo-alogenati.

COCCHIONI, Mario;SCURI, Stefania;PETRELLI, Fabio;CELESTINO, ANNA;GRAPPASONNI, Iolanda
2013-01-01

Abstract

PET is the most widespread material (~80%) in use for mineral water bottling. This study is focused on the possibility that pollutants in the environment cross the PET and pollute the water. Mineral water PET-bottles were exposed in closed environment at chloroform, trichloroethylene and tetrachloroethylene vapors and analyzed after 10, 20 and 30 days. The results suggest that: a) The exposition at organo-halogenated compounds produces a water contamination by migration of contaminants trough the PET; b) The 0.5 lt bottles have an higher contamination than 1.5 lt bottles; this phenomenon can be explained by the different contact surface area between water and PET material. In 0.5 lt bottles this contact area is bigger; c) In sparkling waters, the penetration of the environmental contaminants for the high CO2 concentration and for the internal pressure appears limited; d) The bottles with a PET greater thickness showed a lower contamination; e) The migration mechanism of contaminants and new technologies to reduce the PET permeability are still to be investigated.
2013
262
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/330181
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