سنتز آهن صفر ظرفیتی بارگذاری شده بر روی نانولوله‌های کربنی و بررسی کارآیی آن در حذف یک آلاینده رنگزا
محورهای موضوعی : ارزیابی خطرات آلاینده ها بر روی محیط زیست
زهره قاضی طباطبایی
1
(استادیار گروه شیمی، واحد اهر، دانشگاه آزاد اسلامی ، اهر، ایران )
کلید واژه: نانولوله‌های کربنی, روش باکس-بنکن, آهن صفر ظرفیتی, راکتیو نارنجی 122,
چکیده مقاله :
در این مطالعه آهن صفر ظرفیتی بارگذاری شده بر روی نانولوله‌های کربنی به عنوان یک نانوجاذب سنتز شد و مورفولوژی آن با میکروسکوپ الکترونی روبشی (SEM) مورد بررسی قرار گرفت. کارایی نانوجاذب برای رنگ‌زدائی و حذف آلاینده رنگ راکتیو نارنجی 122 مورد بررسی قرار گرفت. بهینه‌سازی متغیرهای عملیاتی مانند مقدار نانوجاذب، غلظت اولیه رنگ و pH به روش طراحی آزمایش بر پایه سطح پاسخ و روش باکس-بنکن انجام شد. حداکثر راندمان حذف در شرایط بهینه %86/16 بدست آمد. با استفاده از روش تحلیل واریانس موثرترین پارامتر شناسایی گردید. برای پیش‌بینی میزان حذف، مدلی با استفاده از آنالیز رگرسیون چند متغیره ارائه گردید.
In this study, zero-valent iron loaded onto carbon nanotubes was synthesized as a nano-adsorbent, and its morphology was investigated using a scanning electron microscope (SEM). The effectiveness of the nano-adsorbent for the decolorization and removal of the reactive orange 122 dye pollutant was examined. The optimization of operating variables, including the amount of nano-adsorbent, the initial concentration of the dye, and the pH, was conducted using an experimental design based on response surface methodology (the Box–Behnken method). The maximum removal efficiency under optimal conditions was 86.16%. Through variance analysis, the most influential parameter was identified. A model for predicting the removal efficiency was developed using multivariate regression analysis.
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