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نوع مقاله : مقالات پژوهشى اصیل کمی و کیفی

نویسندگان

1 مربی- عضو هیأت علمی گروه مهندسی بهداشت محیط، عضو مرکز تحقیقات عوامل اجتماعی مؤثر بر سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی بیرجند،

2 دانشیار، مرکز تحقیقات عوامل اجتماعی موثر بر سلامت، دانشگاه علوم پزشکی بیرجند، بیرجند، ایران.

3 مربی- عضو هیأت علمی گروه مهندسی بهداشت محیط، عضو مرکز تحقیقات عوامل اجتماعی مؤثر بر سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی بیرجند، بیرجند، ایران

چکیده

مقدمه: در سالهای اخیر نگرانی درمورد حضور طیف وسیعی از مواد دارویی از جمله آنتی بوتیکها در محیط‌های آبی افزایش یافته است. به‌طور معمول این مواد به دلیل ناکارآمدی تکنولوژی‌های متداول تصفیه فاضلاب، از مسیرهای مختلفی مانند رواناب کشاورزی، تخلیه مستقیم از تصفیه خانه‌های فاضلاب شهری، مواد دفعی انسان، دفع مستقیم زائدات پزشکی، صنعت و غیره وارد محیط‌های آبی می‌شوند. بنابراین در تحقیق حاضر کارایی حذف پنی‌سیلین G، با استفاده از فرآیند الکتروفنتون، از محلول‌های آبی، مورد بررسی قرار گرفته است.
روش بررسی: تحقیق حاضر در مقیاس آزمایشگاهی در مخزن شیشه‌ای به حجم cc 400 با استفاده از الکترودهای آهنی صورت گرفت.دستگاه مجهز به تنظیم‌کننده میزان جریان جهت تنظیم سریع متغیر بود. برق ورودی به دستگاه، جریان متناوب شهری می‌باشد. مخزن با آب سنتزی حاوی پنی‌سیلین G در غلظت‌های mg/L200-50 پر شد. درصد حذف آلاینده در پتانسیلV 26، شدت جریان 6/0-05/0آمپر، مدت‌زمان min 120-0، pH 12-3 و فاصله بین الکترودها در محدوده cm 4-1 بررسی شد.
یافته ها: بر اساس نتایج حاصله میزان حذف پنی‌سیلین G به پارامترهای مختلف بهره‌برداری از جمله pH ، دانسیته‌جریان الکتریکی ، زمان واکنش ، غلظت آنتی‌بیوتیک و فاصله بین الکترود بستگی دارد. شرایط بهینه بهره‌برداری pH معادل 3، دانسیته جریان الکتریکی برابر A 6/0، زمان واکنش min 20، غلظت آنتی بیوتیک mg/L 50 و فاصله بین الکترود cm1 با میزان غلظت پرواکسیدهیدروژن mmol 25 در فرایند الکتروفنتون حاصل شد.
نتیجه‌گیری: براساس نتایج حاصل از این تحقیق فرایند الکتروفنتون می‌تواند به عنوان روشی نسبتاً مناسب در حذف پنی-سیلین G از محیط‌های آبی مطرح گردد.

کلیدواژه‌ها

عنوان مقاله [English]

“Evaluation of the Efficiency of the Electrofenton Process in removal of penicillin G from aqueous solutions”

نویسندگان [English]

  • Salehe Salehnia 1
  • Behnam Barikbin 2
  • Rasoul Khosravi 3

1 MSc,Department of Health, Birjand University of Medical Sciences,birjand,iran,

2 Associate Professor, Social Determinates of health Research Center, Department of Environmental Health Engineering, Birjand University of Medical Sciences Birjand, Iran

3 MSc,Department of Health, Birjand University of Medical Sciences,birjand,iran,

چکیده [English]

Introduction :In recent years, concerns have been raised about the presence of a wide range of drug substances and antibiotics in aquatic environments. Usually these materials are due to the inefficiency of conventional wastewater treatment technologies, From various routes such as agricultural runoff, direct discharge from urban wastewater treatment plants, human waste products, direct disposal of medical waste, industry, etc. into aquatic environments. The present study aims at the removal of penicillin G through electrofenton process in the aqueous solution.
Methods : The present study was conducted on laboratory scale in tanks made of glass using iron electrodes with useful volume 400 cc. The device is equipped with a flow rate regulator and voltage regulator to control these variables. Urban alternate current forms the input to the devices. The tank was filled with synthetic penicillin G with a concentration of 50-200 mg/L. The removal of penicillin G at potential 26V, the intensity of the 0.05-0.6A, Time 0-120 min, pH: 3-12 and the distance between the electrodes was measured in the range of 1-4cm.
Results: The aim of present study was to the potential of the processes of electrofenton removal of penicillin G in aquatic environments. The results were pH of 3, the electric current density 0.6A, reaction time 20min, the concentration of antibiotic 50mg/l, and the distance between electrodes 1cm with concentration of H2O2 25mmol . in these circumstances, the results showed that electrocoagulation process is the ability to remove 100 percent of the pollutants.
Conclusion: The results of this study illustrate that electrofenton process with iron electrodes is cost-effective removal of organic compounds.

کلیدواژه‌ها [English]

  • electrofenton
  • penicillin G
  • iron electrode
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