Factors influencing the photocatalytic decolorization of methylene blue in the presence of natural iron oxide and oxalic acid under UV irradiation.
Joint Authors
Djebbar, K.
Sehili, T.
Bin Hamudah, K.
Source
Sciences et Technologie : Sciences Exactes
Issue
Vol. 2014, Issue 39 (30 Jun. 2014), pp.61-66, 6 p.
Publisher
Publication Date
2014-06-30
Country of Publication
Algeria
No. of Pages
6
Main Subjects
Abstract AR
في هذا العمل, قمنا بدراسة التفكك الإشعاعي لأزرق المثيلان بوجود أكسيد الحديد و حمض الأكسليك تحت الأشعة فوق البنفسجية, إمتزاز أزرق الميثيلان على سطح أكسيد الحديد يتبع نظام Langmuir.
عند تواجد حمض الأكسليك و أكسيد الحديد معا, تشكل نظام photo Fentonو تم التفكيك الكلي لأزرق المثيلان في 90 دقيقة.
إضافة 2% من tertiobutanol يؤكد أن الجذور الهيدروكسلية هي المسؤولة على التفاعل.
أثبتت النتائج ضرورة الأكسجين في التفاعل و أن ماء الأكسجين مسرع لتفكك أزرق المثيلان عند تركيز 5 × 10مول / ل, متابعة تفاعل تفكك أزرق الميثلان بواسطة الطلب على الأكسجين الكيماوي برهن فعالية أكسيد الحديد.
Abstract EN
In this work, the methylene blue (MB) heterogeneous photodegradation was investigated in the natural iron oxide (NIO) and oxalic acid process under UV irradiation.
The adsorption of MB onto the surface of NIO was found favorable by the Langmuir approach.
Under the operating conditions of this study, the photo-Fenton reaction was set up in co-presence of NIO and Oxalic Acid (OA).
Where, the total degradation of MB was achieved in 90 min.
The mechanism of MB photodegradation was discussed and the use of 2.0 % of tertiobutanol as a scavenger of •OH confirmed their intervention in the reaction.
The effect of oxygen and hydrogen peroxide were investigated, the results demonstrated that the oxygen was necessary in the MB photodegradation and that the optimum concentration of hydrogen peroxide was found to be 5x10-4 M.
measuring the chemical oxygen demand (COD) demonstrates the effectiveness of our natural iron oxide in the degradation of organic pollutants.
Abstract FRE
Dans ce travail, la photodégradation hétérogène du bleu de méthylène (BM) a été étudiée en présence de l’oxyde de fer et de l’acide oxalique sous irradiation ultra-violette.
L’isotherme de Langmuir décrit l’adsorption du BM sur la surface de l’oxyde de fer.
En coprésence de l’oxyde de fer naturel et de l’acide oxalique, la réaction de photo-Fenton a été mise en place et la dégradation totale du BM a été obtenue au bout de 90 minutes.
L’ajout de 2% du tertiobutanol comme inhibiteur des radicaux hydroxyles (•OH) confirme son implication dans la réaction.
Les résultats montrent aussi que l’oxygène est important au processus de photodégradation du BM et que la concentration optimale du peroxyde d’hydrogène est égale à 5x10-4 M.
la mesure de la demande chimique en oxygène (DCO) montre bien l'efficacité de notre oxyde de fer naturel dans le processus de dégradation de polluants organiques.
American Psychological Association (APA)
Bin Hamudah, K.& Sehili, T.& Djebbar, K.. 2014. Factors influencing the photocatalytic decolorization of methylene blue in the presence of natural iron oxide and oxalic acid under UV irradiation.. Sciences et Technologie : Sciences Exactes،Vol. 2014, no. 39, pp.61-66.
https://search.emarefa.net/detail/BIM-419725
Modern Language Association (MLA)
Bin Hamudah, K.…[et al.]. Factors influencing the photocatalytic decolorization of methylene blue in the presence of natural iron oxide and oxalic acid under UV irradiation.. Sciences et Technologie : Sciences Exactes No. 39 (Jun. 2014), pp.61-66.
https://search.emarefa.net/detail/BIM-419725
American Medical Association (AMA)
Bin Hamudah, K.& Sehili, T.& Djebbar, K.. Factors influencing the photocatalytic decolorization of methylene blue in the presence of natural iron oxide and oxalic acid under UV irradiation.. Sciences et Technologie : Sciences Exactes. 2014. Vol. 2014, no. 39, pp.61-66.
https://search.emarefa.net/detail/BIM-419725
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 66
Record ID
BIM-419725