حذف دیکلوفناک از محیطهای آبی توسط فرایند UV/TiO2در یک فوتوراکتور ناپیوسته با بستر ثابت: بهینه سازی به روش سطح پاسخ
محورهای موضوعی : ارزیابی خطرات آلاینده ها بر روی محیط زیست
1 - دانش آموخته کارشناسی ارشد شیمی کاربردی، گروه شیمی، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران
کلید واژه: فوتوراكتور ناپیوسته با بستر ثابت, دیکلوفناک, روش سطح پاسخ, طراحی ترکیب مرکزی, UV/TiO2,
چکیده مقاله :
در اين کار تحقيقی حذف يك آلايندة دارویی تحت عنوان دیکلوفناک (DCF) با استفاده از فرآيند UV/TiO2در يك فوتوراكتور ناپیوسته با بستر ثابت مورد بررسی قرار گرفته و شرایط عملیاتی موثر در کارآیی فرایند به روش سطح پاسخ (RSM) از نوع طراحی ترکیب مرکزی (CCD) بهینه‌سازی شده است. نتايج طراحي آزمايش نشان‌دهنده اثر مثبت پارامترهاي زمان تابش نور، دبي حجمي و اثر منفي پارامترهاي غلظت اوليه DCF و pH در راندومان حذف آلاینده مورد نظر (DCF) از محیطهای آبی مي‌باشد. همچنین از پارامترهاي مؤثر در راندمان حذف، بيشترين تأثير مربوط به پارامترهای زمان تابش و pH مي‌باشد. مقدار pH بهینه برای حذف DCF در فرایند مذکور حوالی 5/4 می‌باشد.
In this study, the removal of a pharmaceutical contaminant, diclofenac (DCF), using the UV/TiO₂ process in a fixed-bed batch photoreactor was investigated. The effective operating conditions influencing the process efficiency were optimized using Response Surface Methodology (RSM) of the Central Composite Design (CCD) type. The results of the experimental design indicated a positive effect of light irradiation time and volumetric flow rate, and a negative effect of initial DCF concentration and pH on the removal efficiency of DCF from aqueous media. Among the studied parameters, irradiation time and pH were found to be the most influential. The optimal pH for DCF removal in this process was approximately 4.5.
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