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Titre : Photolyse et photocatalyse du feruron (3- phenyl 1-1 dimethylure en solution acqueuse Type de document : texte imprimé Auteurs : Ouarda Brahmia ; Université Mentouri, Editeur scientifique ; T. Sehili, Directeur de thèse Année de publication : 2000 Importance : 109 f. Format : 30 cm Note générale : 01 Disponible dans la salle de recherche
02 Disponibles au magasin de la bibliothèque centraleLangues : Français (fre) Catégories : Français - Anglais
ChimieTags : Environnement Semi-conducteur Photolyse Photocatalyse Fenuron Lumiere Hydrogène peroxyde solution acqueuse Index. décimale : 540 Chimie et sciences connexes Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=3821 Photolyse et photocatalyse du feruron (3- phenyl 1-1 dimethylure en solution acqueuse [texte imprimé] / Ouarda Brahmia ; Université Mentouri, Editeur scientifique ; T. Sehili, Directeur de thèse . - 2000 . - 109 f. ; 30 cm.
01 Disponible dans la salle de recherche
02 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Environnement Semi-conducteur Photolyse Photocatalyse Fenuron Lumiere Hydrogène peroxyde solution acqueuse Index. décimale : 540 Chimie et sciences connexes Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=3821 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BRA/3411 BRA/3411 Thèse Bibliothèque principale Thèses Disponible 
Titre : Contribution de methodes destructives (Photolyse et P.O.A's) et non destructives à l'élimination de deux colorants (Bleu de methylène et rouge Congo) en solution aqueuse Type de document : texte imprimé Auteurs : Oualid Baghriche ; Université Mentouri, Editeur scientifique ; K.E. Djebbar, Directeur de thèse Année de publication : 2005 Importance : 133 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la bibliothèque centrale 01 CD Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Adsorption Photolyse Rayonnement UV Charbon actif Sels H2O2 BM+ S2O8 deus moins et alcools Index. décimale : 540 Chimie et sciences connexes En ligne : ../theses/chimie/BAG4234.pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=3728 Contribution de methodes destructives (Photolyse et P.O.A's) et non destructives à l'élimination de deux colorants (Bleu de methylène et rouge Congo) en solution aqueuse [texte imprimé] / Oualid Baghriche ; Université Mentouri, Editeur scientifique ; K.E. Djebbar, Directeur de thèse . - 2005 . - 133 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la bibliothèque centrale 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Adsorption Photolyse Rayonnement UV Charbon actif Sels H2O2 BM+ S2O8 deus moins et alcools Index. décimale : 540 Chimie et sciences connexes En ligne : ../theses/chimie/BAG4234.pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=3728 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BAG/4234 BAG/4234 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) ???????????? (NH2Cl) (PC500 TiO2) ????? ???? (ZnO) ?????? ???? ??? ??????? (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 : https://bu.umc.edu.dz/md/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 . - [S.l.] : 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) ???????????? (NH2Cl) (PC500 TiO2) ????? ???? (ZnO) ?????? ???? ??? ??????? (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 : https://bu.umc.edu.dz/md/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 comparative de la photodégradation d’un colorant cationique et d’un colorant anionique en phase homogène et hétérogène : Modélisation des cinétiques à l’aide des plans d’expériences Type de document : texte imprimé Auteurs : Nassima Laid, Auteur ; Razika Zouaghi, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 216 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : dye adsorption photolysis photocatalysis TiO2 experimental design colorant photolyse photocatalyse plan d’expérience Index. décimale : 540 Chimie et sciences connexes Résumé : Industrial effluents resulting from the textile, tannery or the printing activities present a
major source of coloring pollutant which is difficult to biodegrade. In this context, the
removal of two model dyes, an anionic dye of the xanthene family (Eosin Yellow), and a
cationic dye of the triphenylmethane family (Malachite Green) by the photochemical process
in homogeneous medium under irradiation (UV-C) at 254 nm and by the photocatalytic
process in a heterogeneous medium at 365 nm (UV-A/TiO2), was studied. The main objective
of this study is to evaluate the effectiveness of these processes in degrading target pollutants
at different operating conditions and to compare and determine the effect of the ionic charge
and the molecular structure of the compound to be degraded on the effectiveness of its
degradation.
The first part of this study focused on the removal of Malachite Green and Eosin Yellow in a
homogeneous medium by direct photochemistry at 254 nm and by the UV/H2O2 processes.
The results showed that the two dyes are photodegradable compounds in presence of UV
irradiation at 254 nm, in particular in the case of Eosin Yellow. However, the COD values
show a relatively low mineralization rate. The effect of certain parameters on the rat of
discoloration of the two dyes by direct photochemistry was studied (pH, intensity of the
photonic flux and the concentration of the dye). The photochemical reaction was significantly
improved in the presence of hydrogen peroxide (UV/H2O2 process) with an optimum
concentration of H2O2 at 10-2 mol L-1. Modeling of the effect of three parameters: dye
concentration, H2O2 concentration and photon flux on degradation rate of Malachite Green by
the process (UV/H2O2), showed that the concentration of H2O2 is the most determining factor
and that the interactions between the three parameters are not significant.
The second part of this study concerns the removal of Malachite Green and Eosin Yellow in a
heterogeneous medium by the UV/TiO2 processes. A kinetic study of the adsorption of the
two dyes studied shows that the mechanism of adsorption on TiO2-P25 is described by
kinetics of the pseudo-second order and that the adsorption isotherms of the dyes on the
catalyst are of type L (Langmuir). The photocatalytic process UV/TiO2 at 365 nm is found to
be very effective for the discoloration and mineralization of Malachite Green and Eosin
Yellow. Their degradation seems to follow the Langmuir-Hinshelwood mechanism and the
rate of their degradation is well described by pseudo-first order kinetics. A more important
discoloration and mineralization of the anionic dye (Eosin Yellow) compared to the cationic
dye (Malachite Green) is observed at natural pH. The operating parameters (the catalyst type
(P25, PC100, PC105, PC50, PC500), pH, dye concentration, temperature, photon flux,
catalyst concentration, presence of the anions (Cl−, HCO3−, SO42−, HPO4−, NO3−) and the
addition of H2O2) all influenced the degradation of Eosin Yellow and Malachite Green, but in
a different way. The use of sunlight as a source of energy in the process (UV/TiO2) has been
found to be very effective for the discoloration and mineralization of model compounds with
respect to UV light. In all experiments, photocatalytic degradation of both dyes was generally
found to correlate with adsorption on the surface of TiO2 in the dark. The application of the
experimental design methodology to model the influence of three experimental parameters
(catalyst particle size, catalyst concentration and pH of the solution) on the photocatalytic
process, showed that pH is the most determining factor and that all the interactions between
the three parameters studied are significant. The optimum values of the parameters giving
maximum yield were also determined.Diplôme : Doctorat en sciences En ligne : ../theses/chimie/LAI7104.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10497 Etude comparative de la photodégradation d’un colorant cationique et d’un colorant anionique en phase homogène et hétérogène : Modélisation des cinétiques à l’aide des plans d’expériences [texte imprimé] / Nassima Laid, Auteur ; Razika Zouaghi, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 216 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : dye adsorption photolysis photocatalysis TiO2 experimental design colorant photolyse photocatalyse plan d’expérience Index. décimale : 540 Chimie et sciences connexes Résumé : Industrial effluents resulting from the textile, tannery or the printing activities present a
major source of coloring pollutant which is difficult to biodegrade. In this context, the
removal of two model dyes, an anionic dye of the xanthene family (Eosin Yellow), and a
cationic dye of the triphenylmethane family (Malachite Green) by the photochemical process
in homogeneous medium under irradiation (UV-C) at 254 nm and by the photocatalytic
process in a heterogeneous medium at 365 nm (UV-A/TiO2), was studied. The main objective
of this study is to evaluate the effectiveness of these processes in degrading target pollutants
at different operating conditions and to compare and determine the effect of the ionic charge
and the molecular structure of the compound to be degraded on the effectiveness of its
degradation.
The first part of this study focused on the removal of Malachite Green and Eosin Yellow in a
homogeneous medium by direct photochemistry at 254 nm and by the UV/H2O2 processes.
The results showed that the two dyes are photodegradable compounds in presence of UV
irradiation at 254 nm, in particular in the case of Eosin Yellow. However, the COD values
show a relatively low mineralization rate. The effect of certain parameters on the rat of
discoloration of the two dyes by direct photochemistry was studied (pH, intensity of the
photonic flux and the concentration of the dye). The photochemical reaction was significantly
improved in the presence of hydrogen peroxide (UV/H2O2 process) with an optimum
concentration of H2O2 at 10-2 mol L-1. Modeling of the effect of three parameters: dye
concentration, H2O2 concentration and photon flux on degradation rate of Malachite Green by
the process (UV/H2O2), showed that the concentration of H2O2 is the most determining factor
and that the interactions between the three parameters are not significant.
The second part of this study concerns the removal of Malachite Green and Eosin Yellow in a
heterogeneous medium by the UV/TiO2 processes. A kinetic study of the adsorption of the
two dyes studied shows that the mechanism of adsorption on TiO2-P25 is described by
kinetics of the pseudo-second order and that the adsorption isotherms of the dyes on the
catalyst are of type L (Langmuir). The photocatalytic process UV/TiO2 at 365 nm is found to
be very effective for the discoloration and mineralization of Malachite Green and Eosin
Yellow. Their degradation seems to follow the Langmuir-Hinshelwood mechanism and the
rate of their degradation is well described by pseudo-first order kinetics. A more important
discoloration and mineralization of the anionic dye (Eosin Yellow) compared to the cationic
dye (Malachite Green) is observed at natural pH. The operating parameters (the catalyst type
(P25, PC100, PC105, PC50, PC500), pH, dye concentration, temperature, photon flux,
catalyst concentration, presence of the anions (Cl−, HCO3−, SO42−, HPO4−, NO3−) and the
addition of H2O2) all influenced the degradation of Eosin Yellow and Malachite Green, but in
a different way. The use of sunlight as a source of energy in the process (UV/TiO2) has been
found to be very effective for the discoloration and mineralization of model compounds with
respect to UV light. In all experiments, photocatalytic degradation of both dyes was generally
found to correlate with adsorption on the surface of TiO2 in the dark. The application of the
experimental design methodology to model the influence of three experimental parameters
(catalyst particle size, catalyst concentration and pH of the solution) on the photocatalytic
process, showed that pH is the most determining factor and that all the interactions between
the three parameters studied are significant. The optimum values of the parameters giving
maximum yield were also determined.Diplôme : Doctorat en sciences En ligne : ../theses/chimie/LAI7104.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10497 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité LAI/7104 LAI/7104 Thèse Bibliothèque principale Thèses Disponible
Titre : Dégradation photocatalytique du mordant bleu 13 en milieu hétérogène Type de document : texte imprimé Auteurs : Nassima Laid, Auteur ; Razika Zouaghi, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2010 Importance : 141 f. Format : 31 cm Note générale : Magister
2 copies imprimées disponiblesLangues : Français (fre) Catégories : Français - Anglais
ChimieTags : Mordant bleu13 Photolyse UV/H2O2 UV/S2O82- Adsorption Photocatalyse TiO2 –P25. Chimie Index. décimale : 540 Chimie et sciences connexes En ligne : ../theses/chimie/LAI5954.pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=5762 Dégradation photocatalytique du mordant bleu 13 en milieu hétérogène [texte imprimé] / Nassima Laid, Auteur ; Razika Zouaghi, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2010 . - 141 f. ; 31 cm.
Magister
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Mordant bleu13 Photolyse UV/H2O2 UV/S2O82- Adsorption Photocatalyse TiO2 –P25. Chimie Index. décimale : 540 Chimie et sciences connexes En ligne : ../theses/chimie/LAI5954.pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=5762 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité LAI/5954 LAI/5954 Thèse Bibliothèque principale Thèses Disponible
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