Antimony release in PET bottled natural water in Lebanon
2012
Hureiki L. | Mouneimne Y. | Hureiki, L., Faculty of Public Health, Lebanese University, Box 90-1556, Jdeidet El-Metn, Fanar, Lebanon | Mouneimne, Y., K.A.S. Central Research Science Laboratory, American University, Box 11-0236, Beirut, Lebanon | Hureiki, L.; Faculty of Public Health, Lebanese University, Box 90-1556, Jdeidet El-Metn, Fanar, Lebanon; email: [email protected] | University: American University of Beirut; Faculty: Faculty of Agricultural and Food Sciences; Department: FAFS; | FAFS | [email protected] | Faculty of Agricultural and Food Sciences | Hureiki, L | Mouneimne, Y | Hureiki, L (reprint author), Lebanese Univ, Fac Publ Hlth, Box 90-1556, Jdeidet El Metn, Fanar, Lebanon. | American University of Beirut
Antimony (Sb) leaching from polyethylene terephthalate (PET) bottling material was assessed in eight registered Lebanese brands of bottled natural water as a function of contact time. The study was performed indoors at 22 °C in the dark and outdoors at a maximum temperature of 45 °C under sunlight. The leached antimony concentration increased with contact time for all of the studied brands except one. The antimony concentration reached 5.5 μg-L after 544 days of contact time with PET packaging. Small bottles with large contact surface area had higher antimony concentration. However, outdoor storage under sunlight at temperatures below 45 °C did not reveal a significant effect on antimony release. Among some physico-chemical parameters studied (pH, calcium, magnesium and bicarbonate), only calcium concentration showed a significant effect on antimony release. The rate of antimony leaching, normalized to the surface to volume ratio of the water bottle, fits the exponential model Sb-(S-V)=0.562e0.0041t, with R2 = 0.87. Atomic absorption spectroscopy analysis of the different PET packaging material showed an antimony concentration between 80.6 and 352.7 mg Sb-kg PET. © IWA Publishing 2012.
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