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Auteur Kamel Djebbar |
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Affiner la recherche Interroger des sources externesContribution à l’élimination de colorants (Vert de méthyle et Bromocrésol pourpre) par procédés photochimiques en phase homogène (séparés et mélangés), en phase hétérogène en milieu aqueux et par adsorption (Vert de méthyle) sur ZnO. / Ibtissem Bousnoubra
Titre : Contribution à l’élimination de colorants (Vert de méthyle et Bromocrésol pourpre) par procédés photochimiques en phase homogène (séparés et mélangés), en phase hétérogène en milieu aqueux et par adsorption (Vert de méthyle) sur ZnO. Type de document : texte imprimé Auteurs : Ibtissem Bousnoubra, Auteur ; Kamel Djebbar, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 209 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Photodégradation Procédés d’oxydation Avancés Photocatalyse Vert de méthyle Bromocrésol pourpre Photodegradation Advanced oxidation Processes photocatalysis Méthyle green Bromocresol purple تحلل ضوئي عمليات الاكسدة المتقدمة الفوتوتحفيزية أخضر المثيل بنفسجي البرموكريزول Index. décimale : 540 Chimie et sciences connexes Résumé : The study was aimed to study and to compare efficiences of photochemical processes (direct photolysis and advanced oxidation processes POAs) in the degradation of two dyes: the méthyle green and purple Bromocresol. These experiments have occurred in homogeneous phase where the two dyes were studied separately, in a binary mixture and in heterogeneous phase by using ZnO / UV and TiO2 (PC500) / UV.
In Direct photolysis (365 nm and solar light), the elimination yields is weak, mainly,in rtificial light. However and at 254 nm, the BCP only conducts to good results comparatively to these of MG. In another part, a total decolorization of both substrates is obtained by using a
photosensitizer: acetone (10-1 mol. L-1).
In photooxidation (H2O2/UV et S2O8-2/UV), this process was much efficient due to the participation of radicals •OH and SO4•-, this work was undertaken by taking into account the
sensitivity of both dyes in presence of H2O2 and S2O8-2 in absence of light where we observe an insensitivity of BCP towards H2O2 but a sensitivity of MG for H2O2> 10-5M. In this
research, other processes have led also to a good elimination like Fe2+/ H2O2/ UV (254 nm) and Fe3+/ H2O2/
UV (254 nm). The results obtained with these systems, were much more probants comparatively
with Fenton and Like-Fenton. For the binary system, it was observed in one part that the
decolorization of the dye decreases with the addition of the second dye and in another part that
the process acetone/UV is the best system comparatively to direct photolysis UV and H2O2 / UV.
Besides, no change in the kinetics models is observed in the binary system.
In photocatalysis, the elimination of MG and BCP was total with ZnO/UV and TiO2
(PC500)/UV where this one is related directly to radical •OH. Studies were also conducted in
sunlight and demonstrate the superiority of this latter comparatively to the artificial light (99,
74% in 60 minutes for MG and 100% in 120 minutes for BCP). The Langmuir Hinshelwood model describes correctly this process. It should be mentioned that in absence of light, MG showed a better adsorption capacity than BCP where it reached 92% in 180 minutes. The monitoring function of the DCO elimination showed that it depends to the organic matter and decreases over time.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/BOU7006.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10382 Contribution à l’élimination de colorants (Vert de méthyle et Bromocrésol pourpre) par procédés photochimiques en phase homogène (séparés et mélangés), en phase hétérogène en milieu aqueux et par adsorption (Vert de méthyle) sur ZnO. [texte imprimé] / Ibtissem Bousnoubra, Auteur ; Kamel Djebbar, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 209 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Photodégradation Procédés d’oxydation Avancés Photocatalyse Vert de méthyle Bromocrésol pourpre Photodegradation Advanced oxidation Processes photocatalysis Méthyle green Bromocresol purple تحلل ضوئي عمليات الاكسدة المتقدمة الفوتوتحفيزية أخضر المثيل بنفسجي البرموكريزول Index. décimale : 540 Chimie et sciences connexes Résumé : The study was aimed to study and to compare efficiences of photochemical processes (direct photolysis and advanced oxidation processes POAs) in the degradation of two dyes: the méthyle green and purple Bromocresol. These experiments have occurred in homogeneous phase where the two dyes were studied separately, in a binary mixture and in heterogeneous phase by using ZnO / UV and TiO2 (PC500) / UV.
In Direct photolysis (365 nm and solar light), the elimination yields is weak, mainly,in rtificial light. However and at 254 nm, the BCP only conducts to good results comparatively to these of MG. In another part, a total decolorization of both substrates is obtained by using a
photosensitizer: acetone (10-1 mol. L-1).
In photooxidation (H2O2/UV et S2O8-2/UV), this process was much efficient due to the participation of radicals •OH and SO4•-, this work was undertaken by taking into account the
sensitivity of both dyes in presence of H2O2 and S2O8-2 in absence of light where we observe an insensitivity of BCP towards H2O2 but a sensitivity of MG for H2O2> 10-5M. In this
research, other processes have led also to a good elimination like Fe2+/ H2O2/ UV (254 nm) and Fe3+/ H2O2/
UV (254 nm). The results obtained with these systems, were much more probants comparatively
with Fenton and Like-Fenton. For the binary system, it was observed in one part that the
decolorization of the dye decreases with the addition of the second dye and in another part that
the process acetone/UV is the best system comparatively to direct photolysis UV and H2O2 / UV.
Besides, no change in the kinetics models is observed in the binary system.
In photocatalysis, the elimination of MG and BCP was total with ZnO/UV and TiO2
(PC500)/UV where this one is related directly to radical •OH. Studies were also conducted in
sunlight and demonstrate the superiority of this latter comparatively to the artificial light (99,
74% in 60 minutes for MG and 100% in 120 minutes for BCP). The Langmuir Hinshelwood model describes correctly this process. It should be mentioned that in absence of light, MG showed a better adsorption capacity than BCP where it reached 92% in 180 minutes. The monitoring function of the DCO elimination showed that it depends to the organic matter and decreases over time.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/BOU7006.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10382 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/7006 BOU/7006 Thèse Bibliothèque principale Thèses Disponible
Titre : Elimination des polluants organiques par méthodes physicochimiques et photochimiques en milieux aqueux. : Cas de l’éthyle violet et du rouge congo (séparés et mélangés) et de la monochloramine Type de document : texte imprimé Auteurs : Abdessemed Ala, Auteur ; Kamel Djebbar, Auteur Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2016 Importance : 224 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Éthyle Violet Rouge Congo Mochloramine TiO2 Charbon actif ZnO Adsorption Rayonnement UV Photolyse H2O2 NaOCl •OH Ethyl violet Congo red Monochloramine Activated carbon UV radiation Photolysis Violet Ethyle) (Congo Rouge) المونوكلرمين (NH2Cl) (PC500 TiO2) كربون منشط (ZnO) إدمصاص أشعة فوق بنفسجية (H2O2) (NaOCl) (•OH ) (•Cl) Index. décimale : 540 Chimie et sciences connexes Résumé : The aim of this research is to study the decolorization of two dyes separated and in a mixture by physico-chemical processes (adsorption, TiO2 and CA-ZnO) and photocatalytic processes like: TiO2/UV and CA-ZnO/UV. Another study has been led on the degradation of Monocloramine in homogeneous phase via direct UV photolysis, H2O2/UV and
NaOCl/UV. Treated separately, both dyes have shown an appreciable adsorption on the two supports and that this process is well represented by an apparent kinetic of order 2.
Besides, Congo Red and Ethyl Violet are described by isotherms of type L and S respectively and that process is also well represented by the model of Langmuir for Ethyl Violet and Redlish-Peterson of Congo Red. On the other hand, the photocatalytic system led via TiO2/UV has been efficient toward both dyes and this process follows an apparent
rate constant of order 1. In another part, this process is well described by the kinetic model of Langmuir-Hinshelwood and that oxidation process occurs, mainly, in surface. The inhibition process has been demonstrated by alcohols proving thereby that radicals •OH are the main oxidation route. The photoproducts issued from the decolorization of the two dyes have been identified using masse spectroscopy technic. This has permitted to establish a mechanism of degradation for the two dyes. Same efficiency is obtained using CAZnO/UV process (CA: activated carbon issued from olive cakes). In another side and in the mixture, the treatment of the two dyes by both systems has, shown that the efficiency decreases as the concentration of the other added dye increases. Indeed, the addition of the second substrate slows down the disappearance speed of the other. The kinitics model
remained unchanged for the two processes (2nd order for adsorption and 1 st order for photocatalysis) The last part treats the degradation of the Monochloramine which occurs via direct UV photolysis in presence of two lamps:
BP (254 nm) and MP (200-600 nm).
The obtained results have been significant. Furthermore, these results have been greatly enhanced mainly by H2O2/UV. However, for NaOCl/UV system we could mention that the disappearance rate slows down because of the formation of photoproducts such as: Mono, Di and Trichloramines. Moreover, the process is well described by an apparent kinetic of order 1 and those photoproducts identified in H2O2/UV, NaOCl/UV and direct photolysis systems are nitrates and nitritesDiplôme : Doctorat en sciences En ligne : ../theses/chimie/ALA6959.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10358 Elimination des polluants organiques par méthodes physicochimiques et photochimiques en milieux aqueux. : Cas de l’éthyle violet et du rouge congo (séparés et mélangés) et de la monochloramine [texte imprimé] / Abdessemed Ala, Auteur ; Kamel Djebbar, Auteur . - جامعة الإخوة منتوري قسنطينة, 2016 . - 224 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Éthyle Violet Rouge Congo Mochloramine TiO2 Charbon actif ZnO Adsorption Rayonnement UV Photolyse H2O2 NaOCl •OH Ethyl violet Congo red Monochloramine Activated carbon UV radiation Photolysis Violet Ethyle) (Congo Rouge) المونوكلرمين (NH2Cl) (PC500 TiO2) كربون منشط (ZnO) إدمصاص أشعة فوق بنفسجية (H2O2) (NaOCl) (•OH ) (•Cl) Index. décimale : 540 Chimie et sciences connexes Résumé : The aim of this research is to study the decolorization of two dyes separated and in a mixture by physico-chemical processes (adsorption, TiO2 and CA-ZnO) and photocatalytic processes like: TiO2/UV and CA-ZnO/UV. Another study has been led on the degradation of Monocloramine in homogeneous phase via direct UV photolysis, H2O2/UV and
NaOCl/UV. Treated separately, both dyes have shown an appreciable adsorption on the two supports and that this process is well represented by an apparent kinetic of order 2.
Besides, Congo Red and Ethyl Violet are described by isotherms of type L and S respectively and that process is also well represented by the model of Langmuir for Ethyl Violet and Redlish-Peterson of Congo Red. On the other hand, the photocatalytic system led via TiO2/UV has been efficient toward both dyes and this process follows an apparent
rate constant of order 1. In another part, this process is well described by the kinetic model of Langmuir-Hinshelwood and that oxidation process occurs, mainly, in surface. The inhibition process has been demonstrated by alcohols proving thereby that radicals •OH are the main oxidation route. The photoproducts issued from the decolorization of the two dyes have been identified using masse spectroscopy technic. This has permitted to establish a mechanism of degradation for the two dyes. Same efficiency is obtained using CAZnO/UV process (CA: activated carbon issued from olive cakes). In another side and in the mixture, the treatment of the two dyes by both systems has, shown that the efficiency decreases as the concentration of the other added dye increases. Indeed, the addition of the second substrate slows down the disappearance speed of the other. The kinitics model
remained unchanged for the two processes (2nd order for adsorption and 1 st order for photocatalysis) The last part treats the degradation of the Monochloramine which occurs via direct UV photolysis in presence of two lamps:
BP (254 nm) and MP (200-600 nm).
The obtained results have been significant. Furthermore, these results have been greatly enhanced mainly by H2O2/UV. However, for NaOCl/UV system we could mention that the disappearance rate slows down because of the formation of photoproducts such as: Mono, Di and Trichloramines. Moreover, the process is well described by an apparent kinetic of order 1 and those photoproducts identified in H2O2/UV, NaOCl/UV and direct photolysis systems are nitrates and nitritesDiplôme : Doctorat en sciences En ligne : ../theses/chimie/ALA6959.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10358 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ALA/6959 ALA/6959 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude de la degradation par voie photochimique de polluant organique « Orange G » en milieu aqueux homogene et heterogene Type de document : texte imprimé Auteurs : Halima Chenini, Auteur ; Kamel Djebbar, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2012 Importance : 164 f. Format : 31 cm. Note générale : Doctorat en sciences
2 copies imprimées disponiblesLangues : Français (fre) Catégories : Français - Anglais
ChimieTags : Photodégradation Procédés d’Oxydations Avancées Fenton H2O2 S2O82- Photocatalyse Index. décimale : 540 Chimie et sciences connexes Diplôme : Doctorat en sciences En ligne : ../theses/chimie/CHE6207.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6176 Etude de la degradation par voie photochimique de polluant organique « Orange G » en milieu aqueux homogene et heterogene [texte imprimé] / Halima Chenini, Auteur ; Kamel Djebbar, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2012 . - 164 f. ; 31 cm.
Doctorat en sciences
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Photodégradation Procédés d’Oxydations Avancées Fenton H2O2 S2O82- Photocatalyse Index. décimale : 540 Chimie et sciences connexes Diplôme : Doctorat en sciences En ligne : ../theses/chimie/CHE6207.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6176 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité CHE/6207 CHE/6207 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude de l'élimination de l'éthyle violet par adsorption sur la Kaolinite et le charbon actif et par des méthodes photochimiques en milieu aqueux Type de document : texte imprimé Auteurs : Abdessemed Ala ; Univ. de Constantine, Éditeur scientifique ; Kamel Djebbar, Directeur de thèse Année de publication : 2009 Importance : 119 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Adsorption Kaolinite Photolyse Rayonnement UV Ethylle violet Charbon actif Sels H2O2 Index. décimale : 540 Chimie et sciences connexes En ligne : ../theses/chimie/ALa5423.pdf Permalink : index.php?lvl=notice_display&id=3777 Etude de l'élimination de l'éthyle violet par adsorption sur la Kaolinite et le charbon actif et par des méthodes photochimiques en milieu aqueux [texte imprimé] / Abdessemed Ala ; Univ. de Constantine, Éditeur scientifique ; Kamel Djebbar, Directeur de thèse . - 2009 . - 119 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Adsorption Kaolinite Photolyse Rayonnement UV Ethylle violet Charbon actif Sels H2O2 Index. décimale : 540 Chimie et sciences connexes En ligne : ../theses/chimie/ALa5423.pdf Permalink : index.php?lvl=notice_display&id=3777 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ALA/5423 ALA/5423 Thèse Bibliothèque principale Thèses Disponible
