بهینه‌سازی فرایند اکسیداسیون پیشرفته فوتوکاتالیتیکی در حضور کاتالیست NH2-MIL125(Ti) در تصفیه فاضلاب صنعت داروسازی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، مهندسی محیط‌زیست، گرایش آب، گروه محیط‌زیست، دانشکده هنر و معماری، واحد تهران غرب، دانشگاه آزاد اسلامی، تهران، ایران

2 دکترای تخصصی، گروه محیط‌زیست، دانشکده هنر و معماری، واحد تهران غرب، دانشگاه آزاد اسلامی، تهران، ایران

چکیده

تخلیه فاضلاب صنعت داروسازی با حضور ترکیبات آلی مانند ترکیبات دارویی به‌ویژه آنتی‌بیوتیک‌ها به محیط‌های آبی، به‌عنوان یکی از مشکلات محیط‌زیستی مطرح است. فرایندهای اکسیداسیون پیشرفته مانند فرایند فوتوکالیتیکی یکی از روش‌های مورد توجه است. هدف از این پژوهش، بهینه‌سازی کارایی فرایند اکسیداسیون پیشرفته فوتوکاتالیتی در حضور کاتالیست NH2-MIL125(Ti) در تصفیه پساب صنعت داروسازی بود. در این پژوهش، کاتالیست NH2-MIL125(Ti) با روش سولوترمال سنتز شده و مشخصات آن توسط آنالیزهای SEM، EDAX، FTIR و XRD بررسی شد. در مرحله بهینه‌سازی، بر اساس طراحی ترکیبی مرکزی، تأثیر متغیرهای pH، دوز نانوکامپوزیت و زمان واکنش بر کارایی حذف اکسیژن موردنیاز شیمیایی در فاضلاب دارویی بررسی شد. نتایج آنالیز مشخص کرد که سنتز کاتالیست با موفقیت انجام شده است. همچنین بهینه‌سازی پیشنهادی مدل، بر اساس ضریب تعیین 99/0R2= از نوع دوجمله‌ای بود. شرایط بهینه واکنش عبارت است از pH برابر 9/6، زمان واکنش برابر 79 دقیقه و دوز نانوکامپوزیت برابر 5/0 گرم در لیتر. در شرایط بهینه 68 درصد COD اولیه کاهش یافت. مکانیزم‌های جذب سطحی و فوتولیز به تنهایی کارایی بسیار کمی نسبت به فرایند فوتوکاتالیتیکی داشتند. در این پژوهش، غلظت COD محلول از 3100 به 992 میلی‌گرم در لیتر رسید. پساب خروجی از این سیستم را می‌توان به سیستم جمع‌آوری فاضلاب شهری تخلیه کرد.

کلیدواژه‌ها

عنوان مقاله [English]

Optimization of the Advanced Photocatalytic Oxidation Process in the Presence of NH2-MIL125(Ti) Catalysts in Wastewater Treatment of Pharmaceutical Industry

نویسندگان [English]

  • Simin Zamani 1
  • Roya Mafigholami 2
1 MSc., Dept. of Environmental Science and Engineering, College of Arts and Architecture, West Tehran Branch, Islamic Azad University, Tehran, Iran
2 PhD., Dept. of Environmental Science and Engineering, College of Arts and Architecture, West Tehran Branch, Islamic Azad University, Tehran, Iran
چکیده [English]

Discharge of pharmaceutical industry wastewater by organic compounds containing pharmaceutical compounds, especially antibiotics into aquatic environments is one of the environmental issues. Advanced oxidation processes such as photocatalytic process is one of the processes which has attracted attention. The aim of this study was to optimize the efficiency of the advanced photocatalytic oxidation process in the presence of NH2-MIL125(Ti) catalyst in the treatment of pharmaceutical industry effluents. In this study, NH2-MIL125(Ti) catalyst was synthesized by solvothermal method and its characteristics were investigated by SEM, EDAX, FTIR and XRD analyzes. For optimization, use of the central composite design, and the effect of pH, nanocomposite dose and reaction time variables, on the COD removal in pharmaceutical wastewater was investigated. The results of the catalyst analysis illustrated that the synthesis of catalyst was successful. Also, the proposed optimization of the model based on the correlation coefficient (R2=0.99), is quadratic. Optimal conditions of process were pH 6.9, reaction time 79 min, and nanocomposite dose equal to 0.5 g/L. At optimal conditions, 68% of the initial COD was removed. Adsorption and photolysis mechanisms are much less efficient than the photocatalytic process. In this study, the soluble COD decreased from 3100 mg/L to 992 mg/L. The effluent from this system can be discharged to the municipal wastewater collection system.

کلیدواژه‌ها [English]

  • Photocatalytic Process
  • NH2-MIL125(Ti)
  • Pharmaceutical Wastewater
  • Central Composite Design

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مجله آب و فاضلاب
دوره 33، شماره 3 - شماره پیاپی 140
مرداد و شهریور 1401
صفحه 101-114

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