کارایی نانو کامپوزیت سبز مغناطیسی بر پایه فریت منگنز به‌منظور حذف تتراسایکلین هیدرو کلراید در حضور نور فرابنفش
محورهای موضوعی : آلودگی های محیط زیست (آب، خاک و هوا)فاطمه گلریزخاتمی 1 , لعبت تقوی 2 * , نگین ناصح 3 , همایون پناهی 4
1 - دانشجوی دکتری رشته علوم و مهندسی محیط زیست، دانشکده منابع طبیعی و محیط‌زیست، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران
2 - دانشیار گروه علوم محیط زیست و جنگل، دانشکده منابع طبیعی و محیط زیست، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران. *(مسوول مکاتبات)
3 - استادیار گروه آموزش بهداشت و ارتقاء سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی بیرجند، بیرجند، ایران.
4 - استاد گروه شیمی، دانشکده علوم پایه، واحد تهران مرکز، دانشگاه آزاد اسلامی، تهران، ایران.
کلید واژه: سنتز سبز, MnFe2O4/BiOI, فرآیند فوتوکاتالیستی, تتراسایکلین, شرایط بهینه.,
چکیده مقاله :
زمينه و هدف: آنتی‌بیوتیک‌ها به دلیل ویژگی زیست‌تخریب‌پذیری پایین، حلالیت و سمیت زیاد، سلامت انسان و محیط‌زیست را تهدید می‌کنند. لذا هدف از انجام این مطالعه سنتز نانو کامپوزیت سبز مغناطیسی MnFe2O4/BiOI و حذف آلاینده تتراسایکلین از محلول‌های آبی به کمک این نانو کامپوزیت طی فرآیند فوتوکاتالیستی در حضور نور فرابنفش است.
روش بررسی: در این مطالعه، نانو کامپوزیت سبز مغناطیسیMnFe2O4/BiOI با استفاده از عصاره گیاهی همیشه‌بهار، در سال 1402- 1401 سنتز شد و کارایی آن در حذف تتراسایکلین توسط نور فرابنفش مورد ارزیابی قرار گرفت. به‌منظور تعیین مشخصات این نانو کامپوزیت، از آنالیزهای XRD، VSM، TEM، FESEM و DRS استفاده گردید.
یافته‌ها: نانو کامپوزیت MnFe2O4/BiOI دارای ابعاد در محدوده 45-14 نانومتر، باند گپ eV 7/1 و میزان اشباع مغناطیسی emu/g 92/19 است. نتایج حاصل از فرآیند فوتوکاتالیستی گویای حذف 100% تتراسایکلین در شرایط بهینه واکنش (9=pH، غلظت mg/L20 تتراسایکلین، دوز g/L 5/0 نانو کامپوزیت MnFe2O4/BiOI و زمان 200 دقیقه)، است.
بحث و نتیجه‌گیری: این مطالعه نشان داد که رویکرد فرآیند فوتوکاتالیستی MnFe2O4/BiOI/UV در تصفیه محلول‌های آبی حاوی آنتی‌بیوتیک تتراسایکلین مؤثر است.
Background and Objective: Antibiotics, due to their low biodegradability, high solubility, and toxicity, threaten human health and the environment. The study aims to create the green magnetic nanocomposite MnFe2O4/BiOI and use it to clean up water solutions through a photocatalytic process when ultraviolet light is present.
Material and Methodology: In this study, carried out in 2022-2023, a green magnetic nanocomposite, MnFe₂O₄/BiOI, was synthesized using an extract from the Calendula officinalis plant. It was then tested to assess its efficiency in removing tetracycline under ultraviolet light. The characteristics of this nanocomposite were determined through XRD, VSM, TEM, FESEM, and DRS analyses.
Findings: Nanocomposite MnFe2O4/BiOI has dimensions ranging from 14–45 nanometers, a band gap of 1.7 eV, and a magnetic saturation level of 19.92 emu/g. The photocatalytic process eliminated all tetracycline when the conditions were right: pH = 9, 20 mg/L of tetracycline, 0.5 g/L of MnFe2O4/BiOI nanocomposite, and 200 minutes of reaction time.
Discussion and Conclusion: The results of this study demonstrate that the photocatalytic process using MnFe2O4/BiOI/UV can effectively treat water contaminated with tetracycline-containing antibiotics.
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