بهینه‌سازی فرآیند تجزیه 4-کلروفنول از پساب صنعتی با استفاده از نانوکاتالیزور کربن فعال/مگنتیت و کاربرد اولتراسونیک
محورهای موضوعی : کاربرد شیمی در محیط زیستزهرا حاجیانی 1 , علی منتظری 2 , زهرا پورنوروز نوده 3 , محمد طاهر شفیعی سیف آبادی 4 , علی آقابابایی بنی 5
1 - گروه شیمی، دانشگاه ملی مهارت، تهران، ایران
2 - پژوهشکده انرژی، پژوهشگاه مواد و انرژی، کرج، ایران
3 - گروه شیمی، واحد لاهیجان، دانشگاه آزاد اسلامی، لاهیجان، ایران
4 - شرکت پتروشیمی لاوان، هلدینگ انرژی سپر، تهران، ایران
5 - گروه مهندسی شیمی، دانشکده فنی و مهندسی، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
کلید واژه: کلمات کلیدی: 4-کلروفنول, فرآیند شبه فنتون, نانوکاتالیزور کربن فعال/مگنتیت, اولتراسونیک, پراکسید هیدروژن, پساب صنعتی,
چکیده مقاله :
چکیده
4-کلروفنول یکی از آلاینده‌های مقاوم و سمی در پساب‌های صنعتی است که نیازمند روش‌های کارآمد برای حذف آن از محیط زیست می‌باشد. در این مطالعه، کارایی نانوکاتالیزور کربن فعال/مگنتیت در تجزیه 4-کلروفنول با استفاده از فرآیند سونو-شبه فنتون بررسی شد. در این پژوهش با هدف اقتصادی شدن فرایند، کربن فعال به عنوان پایه ی کاتالیزور از پوست سخت هسته گیلاس تهیه شد. نتایج نشان داد که در pH برابر با 3، دمای 40 درجه سانتی‌گراد و دوز نانوکاتالیزور 2 گرم در لیتر، کارایی حذف به بیش از 90% برای غلظت 500 میلی‌گرم در لیتر 4-کلروفنول رسید. افزایش غلظت 4-کلروفنول موجب کاهش کارایی و افزایش زمان اکسیداسیون شد. همچنین، پراکسید هیدروژن به عنوان عنصر کلیدی در تولید رادیکال‌های هیدروکسیل برای تجزیه آلاینده‌ها نقش داشت و کمبود یا زیاد بودن آن کارایی فرآیند را تحت تأثیر قرار داد.
4-Chlorophenol is one of the resistant and toxic pollutants in industrial wastewater that requires efficient methods for its removal from the environment. In this study, the efficiency of activated carbon/magnetite nanocatalyst in the degradation of 4-chlorophenol using the sono-Fenton-like process was investigated. To make the process more economical, activated carbon as the catalyst support was prepared from cherry pit hard shells. The results showed that at a pH of 3, a temperature of 40°C, and a nanocatalyst dosage of 2 g/L, the removal efficiency reached over 90% for a 4-chlorophenol concentration of 500 mg/L. An increase in the concentration of 4-chlorophenol led to a decrease in efficiency and an increase in oxidation time. Additionally, hydrogen peroxide played a key role in the production of hydroxyl radicals for pollutant degradation, and its deficiency or excess influenced the process efficiency.
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