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Monday, October 22, 2012

Temperature and Storage Duration Influence on Hygienic Quality of Polyethylene Terephthalate Bottled Military Packaged Water [POSTER]

The impact of temperature and storage time on military packaged water (MPW) quality was examined at four temperatures (23 ⁰C to 60 ⁰C) for 120 days. Polyethylene terephthalate (PET) bottles were filled in California and Afghanistan with reverse osmosis water purification unit (ROWPU) water using the expeditionary water packaging system (EWPS). No military exposure guidelines (MEGs) were exceeded, though USFDA and USEPA drinking water odor intensity limits were exceeded after 14 days of storage. During a 70 Day exposure period, Port Hueneme MPW total organic carbon (TOC) and total trihalomethane (TTHM) levels increased by a factor of 4 and 50, respectively. PET released organic contaminants into MPW and residual disinfectant generated TTHM contaminants. The drinking water odor intensity of Afghanistan MPW exceeded the USFDA and USEPA limits after only 14 days and increased by a factor of 4 by Day 120. Odor causing contaminants were not identified and water did not contain many volatile organic compounds, semi-volatile organic compounds, acetaldehyde, or formaldehyde contaminants. Antimony was detected in 77% of 60 ⁰C Afghanistan MPW at Day 28 and beyond and in all Day 120 waters at all temperatures, but its concentration never exceeded 50% of the MEG. Commanders, Preventive Medicine, and Veterinary Service personnel can integrate results of this work to improve force health protective decisions and doctrine.
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1 comment:

  1. Scott VialJanuary 16, 2013 at 11:56 AM

    Interesting research. I've received many questions about bottled water odors while serving in deployed environments.

    Research like this furthers our understanding of the issue, improves our ability to communicate to our concerned service members, and highlights opporunities for further research.

    ReplyDelete

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