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Register a new userRemoval of Methylene Blue using Photo Fenton Reaction
إزالة أزرق المتلين باستخدام تفاعلات فنتون الضوئية
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Tishreen University ورقة بحثية
Publication date
2020
fields
Chemistry
and research's language is
العربية
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تعد عمليات الأكسدة المتقدمة (AOPs) إحدى الطرائق الهامة لتحطيم وإزالة الملوثات العضوية من الأوساط المائية, وهي تعتمد على تشكيل جذور الهدروكسيل الناتجة عن تفكك الماء الأكسجيني بوجود حفاز. اعتمدنا في هذا العمل على استخدام تفاعلات فنتون الضوئية لإزالة صباغ أزرق المتلين (MB) بوجود الماغنتيت الطبيعي (Mag.) تم تحديد زمن تفكك 25 ml من أزرق المتلين وبقيم تركيز مختلفة (20, 40, 60, 80) ppm. تمت الدراسة على محلول MB بدون إضافات باستخدام أشعة UV فاستغرقت حوالي 24 ساعة من أجل عملية التحطيم الكامل, بينما بإضافة الماغنتيت وباستخدام أشعة UV فاستغرقت عملية التفكك حوالي 18 ساعة, وبوجود الماء الأكسجييني وباستخدام أشعة UV فاستغرقت عملية التفكك حوالي 3.5 ساعة. بينما عند دراسة تفكك MB بوجود الماغنتيت والماء الأكجسيني باستخدام أشعة UV فاستغرقت عملية التفكك حوالي 2.5 ساعة. تم تحديد الشروط المثلى لعملية تفكك MB فتبين من خلال التجارب أن أفضل كمية مضافة من الماغنتيت هي 0.15g وأفضل حجم مضاف من الماء الأكسجيني هو 0.2 ml, وهذا ما يعطينا إزالة أفضل خلال زمن أقل, وذلك من أجل حجم 25 ml من أزرق المتلين.
Advanced oxidation process (AOPs) prepares one of the important methods to degradation and removal the organic pollutants from aqueous solutions. AOPs method depends on the formation of hydroxyl radicals from hydrogen peroxide with a catalyst. In this work we relied on Fenton reaction to removes the Methylene Blue (MB) using natural magnetite as catalyst. The time for degradation of MB solutions (volume 25ml) in the different concentrations (20, 40, 60, 80) ppm was determined. The maximum degradation of MB in the solution was achieved after 24h with UV irradiation and without any additions, the maximum degradation of MB with UV and in addition of magnetite was achieved after 18h, and with UV + H2O2 the process was took up 3.5h, when adding magnetite + H2O2 and using UV the process of degradation of MB was completed after 2.5 hour. The optimal conditions of the degradation process of MB were: when adding 0.15g magnetite + 0.2ml H2O2 using UV, and that for 25 ml value of MB.
References used
S. Rahim Pouran, A. R. Abdul Aziz, and W. M. A. Wan Daud, “Review on the main advances in photo-Fenton oxidation system for recalcitrant wastewaters،”, J. Ind. Eng. Chem, Malaysia, vol. 21, 2015, pp. 53–69
M. Fayazi, M. A. Taher, D. Afzali, and A. Mostafavi, “Enhanced Fenton-like degradation of methylene blue by magnetically activated carbon/hydrogen peroxide with hydroxylamine as Fenton enhancer،” J. Mol. Liq, Iran, vol. 216, 2016, pp. 781–787
S. Mohebali, D. Bastani, and H. Shayesteh, “Equilibrium, kinetic and thermodynamic studies of a low-cost biosorbent for the removal of Congo red dye: Acid and CTAB-acid modified celery (Apium graveolens)،”J. Mol. Struct, Iran, vol. 1176, 2019, pp. 181–193
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