مجله آب و فاضلاب

مجله آب و فاضلاب

امکان‌سنجی تصفیه نوری مؤثر آب‌های آلوده به آنتی‌بیوتیک‌های مختلف با استفاده از نانو ساختار اتصال ناهمگون متخلخلBiOBr (2D)/UiO-66 (0D) تحت تابش نور خورشید

نوع مقاله : مقاله پژوهشی

نویسندگان
بهمن رضایی 1
فرهاد رحمانی 2
مهرداد خامفروش 2
1 دانش‌آموخته کارشناسی ارشد، گروه مهندسی شیمی، دانشکده مهندسی، دانشگاه کردستان، سنندج، ایران
2 دانشیار، گروه مهندسی شیمی، دانشکده مهندسی، دانشگاه کردستان، سنندج، ایران
10.22093/wwj.2025.535808.3502
چکیده
آلودگی منابع آبی ناشی از آنتی‌بیوتیک‌ها، تهدیدی جدی برای سلامت عمومی و محیط‌زیست محسوب می‌شود و توسعه راهکارهای تصفیه‌ای پایدار را ضروری می‌سازد. در این پژوهش، تصفیه مؤثر آب‌های آلوده به آنتی‌بیوتیک‌های تتراسایکلین، سیپروفلوکساسین و آموکسی‌سیلین به‌صورت منفرد و مخلوط، تحت تابش نور خورشید و با استفاده از نانو کامپوزیت BiOBr (2D)/UiO-66 (0D) ارزیابی شد. به‌این منظور، نانو کامپوزیت مذکور به روش ترموشیمیایی دومرحله‌ای و با نسبت اتمی Bi:Zr برابر با 11:1 سنتز و به کمک تکنیک‌های XRD، FESEM/EDX، UV-Vis و جذب-واجذب گاز نیتروژن مشخصه‌یابی شد. نتایج آنالیزهای شناسایی، سنتز موفق یک ساختار اتصال ناهمگون متخلخل از نوع II با اندازه حفره‌هایی عمدتاً در بازه 2 تا 10 نانومتر، سطح تماس m2/g 11/25، قابلیت جذب کارآمد نور خورشید، مورفولوژی لایه‌ای از BiOBr تزئین شده به نانو ذرات UiO-66 با توزیع نسبتاً یکنواخت و برهم‌کنش مناسب را تأیید می‌کنند. نتایج آزمون‌های عملکردی بیانگر کارایی قابل‌قبول نانو کامپوزیت سنتزی در تخریب فتوکاتالیستی آنتی‌بیوتیک‌های مختلف و تصفیه نوری مؤثر آب‌های آلوده تحت تابش نور خورشید است، به‌نحوی‌که در مدت‌زمان 2 ساعت تحت تابش نور خورشید و دوز g/L 5/0 توانست تتراسایکلین، سیپروفلوکساسین و آموکسی‌سیلین در سیستم‌های منفرد با غلظت اولیه ppm 10 را به ترتیب 8/90، 7/88 و 8/66 درصد حذف کند. در سیستم حاوی مخلوط آنتی‌بیوتیک‌ها نیز، کارایی حذف به ترتیب برابر با 9/90، 3/83 و 4/28 درصد مشاهده شد. تحلیل سینتیکی نتایج کارایی حذف نشان داد که تخریب نوری هر سه آنتی‌بیوتیک از مدل سینتیکی مرتبه اول تبعیت می‌کند. بررسی قابلیت استفاده مجدد از نانو کامپوزیت، پایداری ساختاری و فعالیت فتوکاتالیستی مناسبی را طی چهارچرخه متوالی نشان داد. این نتایج، نانو کامپوزیت سنتز شده را به‌عنوان فتوکاتالیستی مؤثر، پایدار و سازگار با محیط‌زیست برای تصفیه آب‌های آلوده به آنتی‌بیوتیک‌ها تحت تابش نور خورشید معرفی می‌کنند.
کلیدواژه‌ها
تصفیه فتوکاتالیستی
نور خورشید
آنتی‌بیوتیک‌ها
نانو کامپوزیت BiOBr بنیان
چارچوب‌های فلز-آلی

موضوعات

عنوان مقاله English

Toward Efficient Solar-Driven Photocatalytic Treatment of Water Contaminated with Various Antibiotics Using a Porous BiOBr (2D)/UiO-66 (0D) Heterojunction Nanostructure

نویسندگان English

Bahman Rezaei 1
Farhad Rahmani 2
Mehrdad Khamforoush 2
1 MSc. Graduate, Dept. of Chemical Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Iran
2 Assoc. Prof., Dept. of Chemical Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Iran
چکیده English

Contamination of water resources by antibiotics poses a serious threat to public health and the environment, necessitating the development of sustainable treatment strategies. In this study, the effective treatment of water contaminated with commonly used antibiotics-tetracycline, ciprofloxacin, and amoxicillin-both individually and in mixture, was evaluated under natural sunlight irradiation using a BiOBr (2D)/UiO-66 (0D) nanocomposite. The nanocomposite was synthesized via a two-step thermochemical method with a Bi:Zr atomic ratio of 11:1 and characterized using XRD, FESEM/EDX, UV-Vis and nitrogen adsorption–desorption analyses. Characterization results confirmed the successful synthesis of a porous type-II heterojunction structure with pore sizes mainly in the range of 2-10 nm, a surface area of 25.11 m2/g, efficient solar light absorption, a layered morphology of BiOBr decorated with UiO-66 nanoparticles with relatively uniform distribution, and suitable interaction. Performance tests indicated acceptable efficiency of the synthesized nanocomposite in the photocatalytic degradation of different antibiotics and effective solar-assisted treatment of polluted water. Within 2 h under sunlight irradiation and at a dosage of 0.5 g/L, the nanocomposite achieved degradation efficiencies of 90.8, 88.7 and 66.8% for tetracycline, ciprofloxacin, and amoxicillin, respectively, in single-solute systems with an initial concentration of 10 ppm. In the mixed-antibiotic system, degradation efficiencies were 90.9, 83.3, and 28.4%, respectively. Kinetic analysis of the removal efficiencies showed that the photodegradation of all three antibiotics followed a first-order model. Reusability assessment of the nanocomposite showed structural stability and suitable photocatalytic activity over four consecutive cycles. These findings introduce the synthesized nanocomposite as an efficient, stable, reusable, and environmentally friendly photocatalyst for the treatment of antibiotic-contaminated water under sunlight.

کلیدواژه‌ها English

Photocatalytic Treatment
Sunlight
Antibiotics
BiOBr-Based Nanocomposite
Metal-Organic Frameworks
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مجله آب و فاضلاب
دوره 36، شماره 2 - شماره پیاپی 157
خرداد و تیر 1404
صفحه 23-42