Selective ultrasound enhanced removal of anionic dyes from binary mixture using multivariate calibration and central composite design modeling by positively charged hyper branched ammonium functionalized magnetic graphene oxide
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Abstract:
گرافن اکساید مغناطیسی اصلاح شده توسط پیوند کوالانسی با دندریمر با ظرفیت جذب بالا سنتز گردید و برای حذف همزمان رنگ‌های ری‌اکتیو قرمز (RR) 195 و ری اکتیو زرد (RY) 145 مورد استفاده قرار گرفت. پارامترهای موثر از قبیل غلظت اولیه رنگ‌ها، مقدار جاذب و زمان امواج فراصوت توسط طراحی آزمایش بهینه گردید. به دلیل هم‌پوشانی شدید طیف رنگ-ها، غلظت رنگ‌ها توسط روش حداقل مربعات جزئی به عنوان یک روش کالیبراسیون چند متغیره محاسبه گردید. غلظت اولیه برابر با mg L-1 20 برای RY و mg L-1 45 برای RR، مقدار جاذب mg 15 و زمان امواج فراصوت min 5/12 به عنوان بهینه به‌دست آمد. به منظور ارزیابی عملکرد جذب، مطالعات ایزوترمی و سینتیکی انجام شد.فرایند جذب از سینتیک شبه درجه دو و مدل ایزرترمی لانگمویر پیروی می‌کند. نتایج نشان داد که جاذب ظرفیت جذب برابر با mg g-1 53/73 و 76/53 به ترتیب برای RY و RR دارد.
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Journal title
volume 14 issue 53
pages 67- 78
publication date 2019-12-22
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