ارزیابی فرایند اکسیداسیون پیشرفته، فنتون هتروژن با نانوکامپوزیت مگنتیت سنتز شده Fe3O4/MWCNTs برای حذف آنتی‌بیوتیک سیپروفلوکساسین از پساب‌های صنعتی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استاد گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران

2 دانشیار گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران

3 دانشجوی کارشناسی ارشد، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران

چکیده

سیپروفلوکساسین آنتی‌بیوتیکی پر مصرف در درمان عفونت‌ها است که تقریباً بخش عمده آن به‌صورت غیر متابولیزه دفع می‌شود و در نهایت از طریق تخلیه فاضلاب‌ها و پساب‌ها به منابع آبی وارد می‌شود. نانولوله‌های کربنه در سطح وسیعی برای حذف آلاینده‌ها استفاده شده است اما مشکلات ناشی از جداسازی آن مطرح است. هدف از این پژوهش، سنتز نانوکامپوزیت مگنتیت Fe3O4/MWCNTs و ارزیابی عملکرد آن در حذف سیپروفلوکساسین توسط فرایند فنتون هتروژن بود. نانوکامپوزیت مگنتیت سنتز شد و در شرایط آزمایشگاهی، با تأکید بر اثرات انواع پارامترهای مؤثر از جمله pH بین 4 تا 10، مقدار جاذب، یک تا 3 گرم در لیتر، غلظت اولیه آنتی‌بیوتیک 30 تا 200 گرم در لیتر، زمان تماس 15 تا 300 دقیقه و غلظت پراکسید هیدروژن 5 تا 25 میلی‌مول در لیتر انجام شد. برای تعیین ویژگی‌های نانوکامپوزیت مگنتیت سنتز شده از میکروسکوپ الکترونی عبوری، دستگاه پراش نگار اشعه ایکس و طیف‌سنج مادون قرمز استفاده شد. نتایج نشان داد که کارایی حذف سیپروفلوکساسین با غلظت 30 گرم در لیتر، در فرایند فنتون هتروژن 95 درصد بعد از زمان حدود 180دقیقه با نسبت مولی یک میلی‌لیتر پراکسید هیدروژن در 2 گرم آهن بود. بر مبنای نتایج می‌توان اظهار نمود که نانوکامپوزیت مگنتیت Fe3O4/MWCNTsقابلیت خوبی برای حذف آنتی‌بیوتیک سیپروفلوکساسین از محیط‌های آبی دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of Synthesized Fe3O4/MWCNTs Nanocomposite Used in the Heterogeneous Fenton Process for the Removal of Ciprofloxacin Antibiotic

نویسندگان [English]

  • Mohammad Taghi Samadi 1
  • Reza Shokoohi 2
  • Roya Harati 3
1 Prof., Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
2 Assoc. Prof., Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
3 MSc Student of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
چکیده [English]

Ciprofloxacin is an antibiotic vastly administrered for the treatment of infections. A major paortion of the drug remains non-metabolized and is excreted to find its way ultimately into water environments through discharge into wastewater. Although carbon nanotubes have been widely employed for the removal of contaminants, ciprofloxacin still poses problems against its proper removal. It is the objective of the present study to synthesize magnetite Fe3O4/MWCNTs and to evaluate its performance in ciprofloxacin removal via the heterogeneous Fenton process. For this purpose, the performance of the synthesized nanocomposite was evaluated while the effects of the following parameters were also investigated on the heterogenous Fenton process under lab conditions: pH, 4‒10); adsorbent quantity, 1‒3 g/l; initial antibiotic concentration, 30‒200 mg/l; contact time, 15‒300 min; and H2O2 concentration, 5‒25 μmol/l. Moreover, the synthesized Fe3O4/MWCNTs  was morphologically and microstructurally characterized using Transmission Electron Microscopy (TEM) and X-ray diffraction (XRD) while the formation of carboxylic functional groups was verified by Fourier transform infrared spectra (FT-IR). It was found that the efficiency of the heterogeneous Fenton process for the removal of ciprofloxacin at a concentration of 30 mg/l was 95% in approximately 180 minutes and a molar ratio of 1 ml H2O2/2g Fe. Based on the results obtained, the Fe3O4/MWCNTs magnetite nanocomposite is well capable of removing ciprofloxacin from aqueous solutions in the heterogeneous Fenton process.

کلیدواژه‌ها [English]

  • Magnetite Nano-Composite
  • Ciprofloxacin Antibiotic
  • Heterogeneous Fenton
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