تصفیۀ فاضلاب پالایشگاه نفت بااستفاده از نانو فتوکاتالیست جدید Fe-ZSM-5@TiO2/Ag

نوع مقاله : مقاله پژوهشی

نویسندگان

• محمد دلنواز
• کیارش اسحقی

دانشکده فنی و مهندسی، گروه مهندسی عمران، دانشگاه خوارزمی، تهران

10.22067/jfcei.2021.68412.1011

چکیده

فاضلاب نفتی حاوی طیف وسیعی از آلاینده­های سخت تجزیه‌پذیر است که با روش­های متداول تصفیه نمی­شود. در این مطالعه حذف فتوکاتالیستی آلاینده­های آلی موجود در فاضلاب واقعی پالایشگاه نفت بااستفاده از نانو فتوکاتالیست سنتزی Fe-ZSM-5@TiO₂/Ag مورد برسی قرار گرفته‌است. برای سنتز نانو فتوکاتالیست ابتدا آهن به‌منظور ارتقای ساختار زئولیت بر­روی ZSM-5  تثبیت شد و سپس تیتانیوم و نقره به‌منظور کاهش شکاف انرژی برروی آن پوشش یافت و مشخصات فیزیکی و شیمیایی آن توسط آنالیزهای XRD، SEM، FT-IR و BET تعیین شد. رویۀ انجام آزمایش­های تصفیۀ فاضلاب پالایشگاه نفت بااستفاده از طراحی آزمایش به‌روش پاسخ سطح (RSM) انجام شد. برای بررسی پارامترهای تأثیرگذار، اثر غلظت آلاینده، غلظت نانوذرات فتوکاتالیست، pH، زمان واکنش، طول موج تابش و فتوکاتالیست­های مختلف در یک پایلوت ناپیوسته انجام شد. نتایج نشان داد که در pH برابر با 5 و غلظت فتوکاتالیست Fe-ZSM-5@TiO₂/Ag برابر با 2 گرم بر لیتر و تحت تابش نور UV-A به شدت 54 وات و زمان 240 دقیقه بهترین عملکرد حذف COD در حدود 83 درصد به‌دست می­آید.
 

کلیدواژه‌ها

• نانو فتوکاتالیست
• زئولیت
• لامپ UV
• فاضلاب نفتی

20.1001.1.27832805.1400.34.2.5.9

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عنوان مقاله [English]

Treatment of Petroleum Wastewater Using new Fe-ZSM-5@TiO2/Ag Nano Photocatalyst

نویسندگان [English]

• Mohammad Delnavaz
• Kiarassh Eshaghi

Faculty of Engineering, Civil Engineering Department, Kharazmi University

چکیده [English]

  Petroleum wastewater contains a wide range of hard biodegradable pollutants that are not treated by conventional treatment methods. In this study, the photocatalytic degradation of organic pollutants in the wastewater of Petroleum were investigated using new Fe-ZSM-5@TiO₂/Ag synthetic nano-photocatalyst. Synthesis of nano photocatalyst was done by immobilizing iron on zeolite to improve ZSM-5 structure and then TiO₂ and Ag coated to reduce the band gap energy. Physical and chemical properties of the materials determined by XRD, SEM, FT-IR and BET analyzes. TiO₂ in the anatase phase was shown in synthetic nano-photocatalyst using XRD analysis. The uniformity of the nanoparticles was also revealed in the SEM images, which showed that the TiO₂ and Ag particles were well located on the surface of Fe-ZSM-5. Experimental procedure was done using experimental method by response surface method (RSM). The effects of main parameters containing pollutant concentration, photocatalyst nanoparticle concentration, pH, reaction time, radiation wavelength and different photocatalysts were performed in a batch pilot. The results showed that at pH=5 and the photocatalyst concentration of Fe-ZSM-5@TiO₂/Ag equal to 2 g/L under UV-A irradiation at 54 watts and 240 min time the best COD removal performance was about 83%.

کلیدواژه‌ها [English]

• Nano-photocatalyst
• Zeolite
• UV lamp
• Petroleum wastewater

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