نوع مقاله : مقاله پژوهشی کامل
نویسندگان
گروه شیمی، دانشکده علوم، دانشگاه پیام نور، تهران، ایران
چکیده
در این کار ، نانوذرات روی اکسید به عنوان جاذب برای جذب رنگ های ری اکتیو آبی 25 و ری اکتیو آبی 49 از محلولهای آبی مورد استفاده قرار گرفت. نانو ذرات روی اکسید با روش رسوبی سنتز و با استفاده از فنون SEM،TEM ، XRD و جذب و واجذبی نیتروژن مشخصه یابی شدند. اثر عوامل مختلف مانند pH محلول، زمان شیکر، مقدار جاذ ب و غلظت اولیه رنگ بر کارایی جذب مورد بررسی قرار گرفت. دادههای تجربی با مدل های سینیتیکی و همدماهای جذبی مختلف ارزیابی شدند. نتایج بدست آمده تبعیت سینیتیک جذب از مدل سینیتیکی شبه مرتبه دوم را نشان داد. همچنین، مطالعه همدماهای جذب حاکی از انطباق داده های جذبی با همدمای لانگ مویر است و بر این اساس، بیشترین ظرفیت جذب برای رنگ رای کتیو آبی 25 و ری اکتیو آبی 49 بترتیب 34.36و 34.60 تعیین شد. با توجه به نتایج این تحقیق، نانوذرات روی اکسید به عنوان یک جاذب موثر و کارامد برای حذف رنگ ها از نمونه های آبی پیشنهاد شدند.
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