تعیین شرایط بهینه و سینتیک حذف رنگ‌زای آبی مستقیم 71 از محلول‌های آبی توسط فرایند فتوکاتالیستی نانو ذرات اکسید روی

سیده ناعمه لاریمی, بیتا آیتی

چکیده


در این تحقیق، تخریب فتوکاتالیستی رنگ­زای آبی مستقیم 71 درون یک راکتور دوغابی در حضور نانو ذرات اکسید روی مورد بررسی قرار گرفت و اثر عوامل pH، میزان کاتالیست، غلظت اولیه رنگ زا و شدت لامپ UV بر راندمان حذف تعیین گردید. حذف کامل رنگ‎زا در غلظت mg/L 50 رنگ­زا، 9=pH و در حضور g/L 288/0 کاتالیست تحت شدت لامپ UVC 60 وات پس از گذشت 4 ساعت به دست آمد. راندمان حذف 14/60 درصد COD پس از گذشت 30 ساعت مشاهده شد. بررسی سینتیک واکنش و انجام آزمایش کروماتوگرافی مایع- طیف سنجی جرمی نشان داد که فرایند مورد نظر با ضریب همبستگی 987/0 از مدل مرتبه دوم تبعیت می­کند و ترکیبات پیچیده موجود در محلول شکسته می­شوند.


واژگان کلیدی


دوغابی، pH، COD، شدت تابش، سینتیک

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منابع و مآخذ مقاله


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