فرایند ترکیبی انعقاد و اکسیداسیون پیشرفته با فنتون در حذفCOD آنتی‌بیوتیک کلاریترومایسین

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشیار، گروه مهندسی بهداشت محیط ،دانشکده بهداشت، دانشگاه علوم پزشکی شهید بهشتی

2 استادیار، گروه مهندسی بهداشت محیط ،دانشکده بهداشت، دانشگاه علوم پزشکی شهید بهشتی

3 هیئت علمی ،گروه مهندسی بهداشت محیط ،دانشکده بهداشت، دانشگاه علوم پزشکی لرستان

4 کارشناس ارشد گروه مهندسی بهداشت محیط ،دانشکده بهداشت، دانشگاه علوم پزشکی

چکیده

آنتی‌بیوتیک‌ها جزء آلاینده‌های مهم محیط‌های آبی به‌حساب می‌آیند. در این مطالعه حذف آنتی‌بیوتیک کلاریترومایسن از فاضلاب ساختگی از طریق فرایند تلفیقی انعقاد و اکسیداسیون پیشرفته مورد بررسی قرار گرفت. این تحقیق در مقیاس آزمایشگاهی و به‌صورت ناپیوسته انجام شد. فاضلاب ساختگی از آنتی‌بیوتیک کلاریترومایسین با غلظت 200 میلی‌گرم در لیتر ساخته شد. شاخص COD به‌عنوان پارامتر مورد بررسی انتخاب گردید. ابتدا فرایند انعقاد بر روی فاضلاب ساختگی انجام و پس از حصول شرایط بهینه برای منعقدکننده مناسب، پساب این مرحله وارد فرایند اکسیداسیون فنتون گردید. در فرایند فنتون تأثیر تغییراتpH ، پراکسید هیدروژن و  Fe2+بر کارایی حذف آنتی‌بیوتیک کلاریترومایسین، مورد ارزیابی قرار گرفت و شرایط بهینه برای هر کدام از پارامترها تعیین شد. براساس نتایج حاصل از این تحقیق، منعقده‌کننده پلی‌آلومینیوم‌کلراید به‌عنوان بهترین منعقدکننده انتخاب گردید. برای این منعقدکننده در pH بهینه برابر 7 و با مقدار ماده منعقدکننده برابر 100 میلی‌گرم در لیتر میزان حذف کلاریترومایسن برابر 84/37 درصد حاصل شد. پارامترهای بهینه در فرایند فنتون، برای حذف کلاریترومایسین نیز، به‌ترتیب pH برابر7 ، Fe2+برابر 45/0میلی‌مول در لیتر، پراکسیدهیدروژن 0/16 میلی‌مول در لیتر و زمان‌ماند 1 ساعت تعیین شد. درضمن نسبت بهینه + H2O2/Fe2 برابر 0/4 به‌دست آمد. با اعمال این شرایط، میزان حذف این آنتی‌بیوتیک با فرایند تلفیقی انعقاد و اکسیداسیون پیشرفته با فنتون، 3/96 درصد تعیین شد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation the Efficiency of Combined Coagulation and Advanced Oxidation by Fenton Process in the Removal of Clarithromycin Antibiotic COD

نویسندگان [English]

  • Ahmad Reza Yazdanbakhsh 1
  • Mohammad Manshouri 2
  • Amir Sheikhmohammadi 3
  • Mahdieh Sardar 4
1 Assoc. Prof. of Environmental Health Eng., Faculty of Public Health, Shahid Beheshti University of Medical Sciences, Tehran
2 Assist. Prof. of Environmental Eng., Faculty of Public Health, Shahid Beheshti University of Medical Science
3 Instructor of Environmental Eng., Faculty of Public Health, Lorestan University of Medical Sciences
4 Instructor of Environmental Eng., Faculty of Public Health, Lorestan Uni. of Medical Sciences
چکیده [English]

Antibiotics are considered among the major pollutants in water environments. In this study, removal of Claritromycine antibiotic has been studied from synthetic wastewater by combined coagulation and advanced oxidation processes. This study, was done in laboratory scale .  Samples of synthetic wastewater  were prepared from Claritromycin antibiotic. Concentration of samples were 200 mg/l. COD index was selected as a parameter evaluated in this study. In the first stage, coagulation process was done on synthetic wastewater and the proper condition was achieved (proper coagulant, optimum pH, dosage of coagulant). After that, Fenton oxidation process was done, on the effluent of coagulation process. In Fenton process the influence of pH, Fe2+ and hydrogen peroxide were studied on the removal efficiency of Claritromycin antibiotic and the optimum values for each parameter were determined. According to the results of this study, Poly Aluminum Chloride (PAC)  is the proper coagulant. With pH equal to 7 and 100 mg/l PAC, 84.37% removal of Claritromycine was achieved.  For fenton process, optimum parameters for the removal of Claritromycin were determined. The optimum condition for fenton process were, pH= 7, Fe2+ equal to 0.45 mmol/ l , hydrogen proxide equal to 0. 16 mmol/l, ratio of H2O2/Fe2+ equal to 0.4 and detention time of 1hour .With Applying of optimum conditions for combined coagulation and Fenton processes, 96.3% removal of Claritromycin was obtained.

کلیدواژه‌ها [English]

  • Wastewater
  • Claritromycin
  • Coagulation
  • Fenton
  • COD
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