بررسی میزان نشت آنتیموان از بطریهای PET به داخل آب معدنی های استان فارس

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشیار بخش مهندسی آب، دانشکده کشاورزی، دانشگاه شیراز

2 دانشجوی کارشناسی ارشد مهندسی محیط زیست، دانشگاه شیراز

چکیده

پلی‌اتیلن ترفتالات رایج‌ترین ماده مورد استفاده در ساخت بطری‌های نگهدارنده آب معدنی است. تری‌اکسید آنتیموان مصرف شده برای شکل‌گیری ظروف PET، ممکن است آب را با مواد تشکیل دهنده خود آلوده نماید. در این پژوهش، تأثیر زمان نگهداری (1تا 8 هفته)، دمای نگهداری (20- تا80 درجه سلسیوس)، pH (3/6 تا 3/8)، نور خورشید و اشعه UV بر میزان نشت آنتیموان از بطری‌هایPET به داخل 15 نوع آب معدنی موجود در استان فارس، با استفاده از دستگاه اسپکترومتر جذب اتمی با کوره گرافیتی بررسی شد. میزان آنتیموان در هفته اول و دوم در همه نمونه‌ها پایین‌تر از حداکثر تراز آلودگی استاندارد ایران (ppb 5) بود ولی در هفته چهارم در یک نمونه (نمونه A) و در هفته هشتم در 3 نمونه ( نمونه‌‌های A،F وJ با غلظت‌های به‌ترتیب 48/5، 08/5 و 06/5 میکروگرم در لیتر) از حداکثر تراز آلودگی بیشتر شد. نور خورشید، اشعه UV، تغییر pH آب معدنی و نگهداری در دماهای 20-، 60 و 80 درجه سلسیوس باعث شد میزان آنتیموان به بالاتر از حداکثر تراز آلودگی برسد. بنابراین قرار دادن بطری‌های آب معدنی در شرایط نامناسب محیطی باعث نشت آنتیموان به داخل آب شده و تهدیدی برای سلامتی مصرف‌کنندگان است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation of Antimony Leaching from Bottles (PET) into the Bottled Waters in Fars Province

نویسندگان [English]

  • Masoud Noshadi 1
  • Leila Abdollahi 2
چکیده [English]

 Polyethylene Terephthalate (PET) is the most common material used in manufacturing mineral water bottles. Antimony trioxide (Sb2O3) used to form the PET containers may pollute water with their ingredients. In this research, graphite furnance atomic absorption spectrometry was used to investigate the effects of storage time (1 to 8 weeks), storage temperature (-20 to 80 °C), pH (6.3 to 8.3), exposure to sunlight, and UV radiation on leaching antimony from PET bottles into the mineral water of 15 bottled water brands available in Fars Province. Concentrations of antimony in the first and second weeks were lower than the maximum standard limit (5 ppb) recommended by Iranian regulations. Antimony concentration in one sample (brand A) rose above the standard limit after four weeks and in 3 samples (brands A, F, and J with antimony concentrations of 5.48, 5.08, and 5.06 µg/L, respectively) exceeded the standard limit after 8 weeks. Sunlight, UV radiation, changes in pH, and storage at temperatures of -20 ℃, 60 ℃, and 80℃ were also found to increase antimony concentrations to levels above the maximum standard limit. Clearly, storing bottled mineral water in ambient conditions may lead to the release of antimony into bottled water, which is a serious threat to public health.  

کلیدواژه‌ها [English]

  • Bottled Waters
  • Antimony
  • Polyethylene Terphatalate
  • Leaching

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