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بهینه‌سازی تجزیه فتوکاتالیستی رنگ رودامین بی با استفاده از نانوکامپوزیت کربن نیترید گرافیتی در نور مرئی و تحلیل اعتبارسنجی تجربی آن با بررسی سینتیک درشرایط بهینه | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 19، دوره 54، شماره 11، بهمن 1401، صفحه 4397-4416 اصل مقاله (2.09 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2022.21241.7665 | ||
| نویسندگان | ||
| احمدرضا زینالی1؛ افسانه شهبازی* 2؛ علیرضا پورخباز1 | ||
| 1دانشکده منابع طبیعی و محیط زیست، دانشگاه بیرجند، بیرجند، ایران | ||
| 2پژوهشکده علوم محیطی، دانشگاه شهید بهشتی، تهران، ایران | ||
| چکیده | ||
| در این مقاله، نانوکامپوزیت کربن نیترید گرافیتی از طریق تثبیت نانوذرات کربن نیترید گرافیتی طی فرآیند هیدروترمال بر روی بستر ارگانوسیلیکای مزوحفره تناوبی سنتز گردید و کارایی آن در تجزیه فتوکاتالیستی رنگ رودامین بی در فتوراکتور نور مرئی LED با بهینه‌سازی پارامترهای موثر بر فرآیند، در آنالیز پاسخ سطحی با روش باکس-بنکن در سه متغیر زمان (10-50 دقیقه)، دوز فتوکاتالیست (0/3 تا 0/7 گرم بر لیتر) و طول موج نور (472-618 نانومتر) بررسی شده است. دقت و اعتبار مدل برازش شده درجه دوم با بالا بودن F-value، معنی‌داری پارامتر p-value (کمتر از 0/0001)، کوچک بودن درصد ضریب تغییر، بالا بودن ضریب های همبستگی (0/98)، عدم معنی داری پارامتر عدم برازش و عدم خود همبستگی بر اساس نتایج آزمون D-W تایید شد. بیشترین کارایی تجزیه فتوکاتالیستی در متغیر طول موج و متغیر تعاملی طول موج-دوز مشاهده گردید. شرایط بهینه در این آنالیز، زمان 50 دقیقه، دوز نانوکامپوزیت0/7 گرم بر لیتر و طول موج 472 نانومتر تعریف شد. مقدار میانگین پیش بینی شده حذف فتوکاتالیستی بر اساس این مدل 92/20 و مقدار تجربی سینتیک اعتبارسنجی شرایط بهینه 90/04 درصد بوده است. تفاوت درصد حذف فتوکاتالیستی در مقدار پیش بینی شده و مقدار تجربی در محدوده پیشبینی شده 95% بوده و مدل مورد تایید قرار گرفته می شود. | ||
| کلیدواژه‌ها | ||
| نانوفتوکاتالیست؛ کربن نیترید گرافیتی؛ ارگانوسیلیکای مزوحفره تناوبی؛ بهینه‌سازی روش پاسخ سطحی؛ رودامین بی | ||
| موضوعات | ||
| آلودگی آب ، فاضلاب؛ بهینه سازی؛ محیط زیست؛ مهندسی محیط زیست | ||
| عنوان مقاله [English] | ||
| Optimization of photocatalytic degradation of rhodamine B dye using graphite carbon nitride nanocomposite in visible light and analyzing its experimental validation in kinetics under optimal conditions | ||
| نویسندگان [English] | ||
| Ahmadreza Zeynali1؛ Afsaneh Shahbazi2؛ Alireza Pourkhabbaz1 | ||
| 1Ph.D. student of Environmental pollution, Faculty of Environmental and Natural Resources, University of Birjand, Birjand, Iran | ||
| 2Associate Professor of Environmental Pollution, Environmental Sciences Research Institute, Shahid Beheshti University, 1983969411, Tehran, Iran | ||
| چکیده [English] | ||
| In this paper, graphite carbon nitride nanocomposite was synthesized by stabilization of graphitic carbon nitride nanoparticles during the hydrothermal process onto periodic mesoporous organosilica based, and its efficiency was studied in photocatalytic degradation of rhodamine B in LED photoreactor using optimizing the parameters affecting the process in response surface methodology by Box-Benken method in three variables, time (10-50 min), photocatalyst dosage (0.3-0.7 g/l) and light wavelength (472-618 nm). The accuracy and validity of the quadratic model were confirmed with a high F-value, the significance of p-value (less than 0.0001), a small percentage of coefficient of variation, high correlation coefficients (0.98), non-significance of lack of fit and lack of autocorrelation based on D-W test results. The highest efficiency of photocatalytic degradation was observed in the wavelength variable and the wavelength-dose interactive variable. The optimal conditions in this analysis were defined as the time of 50 minutes, dose of nanocomposite 0.7 g/L, and wavelength 472 nm. The predicted mean value of photocatalytic degradation based on this model was 92.2% and its experimental value in validation kinetics under optimal conditions was 90.04%. The difference between the predicted mean value and experimental value in photocatalytic is within the prediction interval of 95% and finally, the model was approved. | ||
| کلیدواژه‌ها [English] | ||
| Nanophotocatalyst, Graphitic carbon nitride, Periodic mesoporous organosilica, RSM optimization, Rhodamine B | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 544 تعداد دریافت فایل اصل مقاله: 889 |
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