Détail de l'auteur
Auteur Kamel Ezzine Djebbar |
Documents disponibles écrits par cet auteur (3)
Affiner la recherche Interroger des sources externes"Elimination de deux colorants (Vert de Bromocrésol et Rouge de Crésol) de structure semblable, par des techniques photochimiques et sonochimiques en milieu aqueux homogène et hétérogène" / Soumia Fassi
Titre : "Elimination de deux colorants (Vert de Bromocrésol et Rouge de Crésol) de structure semblable, par des techniques photochimiques et sonochimiques en milieu aqueux homogène et hétérogène" Type de document : texte imprimé Auteurs : Soumia Fassi, Auteur ; Kamel Ezzine Djebbar, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 153 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Photodégradation, Vert de bromocrésol, Rouge de Crésol, Sonochimie
Photodegradation, Bromocresol Green, Cresol Red, sonochemical.
الفوتوكيمياء ،الأخضرالبروموكريزول،أحمر الكريزول،الصونوكيمياءIndex. décimale : 540 Chimie et sciences connexes Résumé : "The aim of this study was to compare the efficiency obtained by some processes coupled or
no with light (artificial and natural) and also by sonchemical technics in the course of the
degradation of two dyes having similar structure: the Bromocresol Green and the Cresol Red
-In direct photolysis (254 nm, 365 nm and solar light), the yield of elimination was weak,
mainly, in artificial light. However, the CR, this yield was better than that obtained in the
BCG but in solar light only. Besides, this process has been improved sensitively by increasing
the light intensity in one part (artificial) and by adding a sensitizer: the Acetone 0.1M in
another part.
The oxidation conducted in homogeneous medium has allowed an effective degradation of
both substrats, especially, when these systems were coupled with light (artificial) : H2O2/UV
and S2O8
2-/UV. This could be attributed to radicals OH• and SO4
•- . It should be mentioned
that no reaction occurred with both dyes and S2O8
2- , H2O2 in absence of light. Similar results
have been obtained with Fe2+ and Fe3+.
When treated by Fenton and like-Fenton, the efficiency reached an average yield of
degradation but a better one when they were coupled with light: Photo-Fenton and like-photo-
Fenton. The performance of these two systems, have been optimized by varying experimental
parameters like: pH, concentration of Fe2+, of Fe3+ and H2O2. The choice of the ratio H2O2/
Fe2+ or H2O2/ Fe3+ has been very necessery for this work.
The oxidation in heterogeneous medium via systems like: ZnO/UV and TiO2/UV, has
allowed also an effective elimination of the two substrates. Before any experimental work, we
observed no adsorption of both dyes in those supports for a time equal to 30 minutes. The
decolorization of both dyes was total when treated by TiO2 (PC500)/UV and ZnO/UV. This
could be attributed also to radicals OH• produced by these two supports and the light. The
kinetic model of Langmuir- Hinshelwood described correctly the photocatalytic process in the
two cases. In solar light (TiO2 PC500/Solar), the experimental results were better than those
obtained in artificial light. The mineralization process has been followed by the DCO technic
and showed a sensitive decreased with time. The sonochemical systems like: US, US / H2O2
and US/ S2O8
2- have allowed also a good yield in the course of the degradation process for
both dyes."
Diplôme : Doctorat En ligne : ../theses/chimie/FAS6508.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9621 "Elimination de deux colorants (Vert de Bromocrésol et Rouge de Crésol) de structure semblable, par des techniques photochimiques et sonochimiques en milieu aqueux homogène et hétérogène" [texte imprimé] / Soumia Fassi, Auteur ; Kamel Ezzine Djebbar, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2014 . - 153 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Photodégradation, Vert de bromocrésol, Rouge de Crésol, Sonochimie
Photodegradation, Bromocresol Green, Cresol Red, sonochemical.
الفوتوكيمياء ،الأخضرالبروموكريزول،أحمر الكريزول،الصونوكيمياءIndex. décimale : 540 Chimie et sciences connexes Résumé : "The aim of this study was to compare the efficiency obtained by some processes coupled or
no with light (artificial and natural) and also by sonchemical technics in the course of the
degradation of two dyes having similar structure: the Bromocresol Green and the Cresol Red
-In direct photolysis (254 nm, 365 nm and solar light), the yield of elimination was weak,
mainly, in artificial light. However, the CR, this yield was better than that obtained in the
BCG but in solar light only. Besides, this process has been improved sensitively by increasing
the light intensity in one part (artificial) and by adding a sensitizer: the Acetone 0.1M in
another part.
The oxidation conducted in homogeneous medium has allowed an effective degradation of
both substrats, especially, when these systems were coupled with light (artificial) : H2O2/UV
and S2O8
2-/UV. This could be attributed to radicals OH• and SO4
•- . It should be mentioned
that no reaction occurred with both dyes and S2O8
2- , H2O2 in absence of light. Similar results
have been obtained with Fe2+ and Fe3+.
When treated by Fenton and like-Fenton, the efficiency reached an average yield of
degradation but a better one when they were coupled with light: Photo-Fenton and like-photo-
Fenton. The performance of these two systems, have been optimized by varying experimental
parameters like: pH, concentration of Fe2+, of Fe3+ and H2O2. The choice of the ratio H2O2/
Fe2+ or H2O2/ Fe3+ has been very necessery for this work.
The oxidation in heterogeneous medium via systems like: ZnO/UV and TiO2/UV, has
allowed also an effective elimination of the two substrates. Before any experimental work, we
observed no adsorption of both dyes in those supports for a time equal to 30 minutes. The
decolorization of both dyes was total when treated by TiO2 (PC500)/UV and ZnO/UV. This
could be attributed also to radicals OH• produced by these two supports and the light. The
kinetic model of Langmuir- Hinshelwood described correctly the photocatalytic process in the
two cases. In solar light (TiO2 PC500/Solar), the experimental results were better than those
obtained in artificial light. The mineralization process has been followed by the DCO technic
and showed a sensitive decreased with time. The sonochemical systems like: US, US / H2O2
and US/ S2O8
2- have allowed also a good yield in the course of the degradation process for
both dyes."
Diplôme : Doctorat En ligne : ../theses/chimie/FAS6508.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9621 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité FAS/6508 FAS/6508 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude de l’élimination de deux colorants (Cristal violet et Jaune d’alizarine) par des procédés photochimiques en milieu homogène (lumière artificielle et solaire) et en milieu hétérogène (TiO2/UV et ZnO/UV) : Cas de la transformation photocatalytique du Jaune d’alizarine sur un support transformé : ZnO-Bi2O3/UV Type de document : texte imprimé Auteurs : Sihem Aliouche, Auteur ; Kamel Ezzine Djebbar, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 190 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Dye Photodegradation advanced oxidation processes Photocatalysis semiconductor ملون التفكك الضوئي طرق الأكسدة المتقدمة التحفيز الضوئي المحفزات Colorant Photodégradation procédés d’oxydation avancés Photocatalyse semiconducteur Index. décimale : 540 Chimie et sciences connexes Résumé : This study is focused in the application of different advanced oxidation processes in a
homogeneous and heterogeneous phase for the treatment of two dyes: the AY and the CV.
The direct photolysis of dyes by the artificial light (254nm and 365nm) and solar light is slow
and can be accelerated by increasing of intensity of photon flux incident, or by adding a
photosensitizer such as acetone at high concentration.
In the case of the two dyes studied, it has been shown that the rate of decolorization by the
AOPs in a homogeneous medium such as H2O2/UV, S2O82-/UV and H2O2/S2O82-/UV, has been
substantially improved compared to that obtained by UV photolysis and that the rate depends on
the experimental parameters such as: concentration of substrate, concentration of catalyst and pH
of medium. This improvement could be related to the production of HO• and SO4•- radicals.
Regarding the system UV/S2O82-/H2O2, we have observed that efficiency decreased slightly
due to a competition effect. On the other hand, the persulfate can generate sulfates radicals ions
by heat activation in absence of light. The degradation of the two dyes has been more effective in
Photo-Fenton and Photo-like-Fenton system than in the Fenton and Fenton-like systems
respectively where the performances of these systems could be optimised by variation of the
experimental parameters such as the pH, the [H2O2]/ [Fe2+] and the [H2O2]/ [Fe3+] ratio. In the
(Fe2+/ S2O82-) and the (UV/Fe2+/S2O82-) system, the persulfate acts on the JA similarly to H2O2
compared to the Fenton and Photo-Fenton processes.
In heterogeneous photocatalysis, the degradation of the JA and the CV has been studied using
different semiconductors (TiO2, ZnO, ZnOpure-Bi2O3). The photocatalysis study of the two dyes
by the TiO2 process (Degussa P25)/UV and ZnO/UV has been presented after overseeing a low
adsorption until saturation (30 minutes). Photocatalysis is influenced by various factors where
this process is improved by the addition of H2O2 but has been inhibited by certain inorganic
anions and alcohols. TiO2-P25 is more efficient than Tiona photocatalysts. In addition, the
Langmuir-Hinshelwood model has adequately described this process. The follow up by the
Chemical Oxygen Demand (DCO), confirms that the photocatalysis process leads to the decrease
of the organic matter content until mineralization of pollutants. Tests in natural radiation showed
a faster degradation of bith pollutant. The ZnO pure-Bi2O3/UV process is more efficient than the
two ZnO commercial/UV and ZnO pur/UV processes in terms of degradation.Diplôme : Doctorat en sciences En ligne : ../theses/chimie/ALI7106.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10495 Etude de l’élimination de deux colorants (Cristal violet et Jaune d’alizarine) par des procédés photochimiques en milieu homogène (lumière artificielle et solaire) et en milieu hétérogène (TiO2/UV et ZnO/UV) : Cas de la transformation photocatalytique du Jaune d’alizarine sur un support transformé : ZnO-Bi2O3/UV [texte imprimé] / Sihem Aliouche, Auteur ; Kamel Ezzine Djebbar, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 190 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Dye Photodegradation advanced oxidation processes Photocatalysis semiconductor ملون التفكك الضوئي طرق الأكسدة المتقدمة التحفيز الضوئي المحفزات Colorant Photodégradation procédés d’oxydation avancés Photocatalyse semiconducteur Index. décimale : 540 Chimie et sciences connexes Résumé : This study is focused in the application of different advanced oxidation processes in a
homogeneous and heterogeneous phase for the treatment of two dyes: the AY and the CV.
The direct photolysis of dyes by the artificial light (254nm and 365nm) and solar light is slow
and can be accelerated by increasing of intensity of photon flux incident, or by adding a
photosensitizer such as acetone at high concentration.
In the case of the two dyes studied, it has been shown that the rate of decolorization by the
AOPs in a homogeneous medium such as H2O2/UV, S2O82-/UV and H2O2/S2O82-/UV, has been
substantially improved compared to that obtained by UV photolysis and that the rate depends on
the experimental parameters such as: concentration of substrate, concentration of catalyst and pH
of medium. This improvement could be related to the production of HO• and SO4•- radicals.
Regarding the system UV/S2O82-/H2O2, we have observed that efficiency decreased slightly
due to a competition effect. On the other hand, the persulfate can generate sulfates radicals ions
by heat activation in absence of light. The degradation of the two dyes has been more effective in
Photo-Fenton and Photo-like-Fenton system than in the Fenton and Fenton-like systems
respectively where the performances of these systems could be optimised by variation of the
experimental parameters such as the pH, the [H2O2]/ [Fe2+] and the [H2O2]/ [Fe3+] ratio. In the
(Fe2+/ S2O82-) and the (UV/Fe2+/S2O82-) system, the persulfate acts on the JA similarly to H2O2
compared to the Fenton and Photo-Fenton processes.
In heterogeneous photocatalysis, the degradation of the JA and the CV has been studied using
different semiconductors (TiO2, ZnO, ZnOpure-Bi2O3). The photocatalysis study of the two dyes
by the TiO2 process (Degussa P25)/UV and ZnO/UV has been presented after overseeing a low
adsorption until saturation (30 minutes). Photocatalysis is influenced by various factors where
this process is improved by the addition of H2O2 but has been inhibited by certain inorganic
anions and alcohols. TiO2-P25 is more efficient than Tiona photocatalysts. In addition, the
Langmuir-Hinshelwood model has adequately described this process. The follow up by the
Chemical Oxygen Demand (DCO), confirms that the photocatalysis process leads to the decrease
of the organic matter content until mineralization of pollutants. Tests in natural radiation showed
a faster degradation of bith pollutant. The ZnO pure-Bi2O3/UV process is more efficient than the
two ZnO commercial/UV and ZnO pur/UV processes in terms of degradation.Diplôme : Doctorat en sciences En ligne : ../theses/chimie/ALI7106.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10495 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ALI/7106 ALI/7106 Thèse Bibliothèque principale Thèses Disponible
Titre : Transformation directe et indirecte de deux herbicides le 2,4- D et le diuron en solution aqueuse Type de document : texte imprimé Auteurs : Kamel Ezzine Djebbar ; Univ. de Constantine, Éditeur scientifique ; T. Sehili, Directeur de thèse Année de publication : 2002 Importance : 220 p. Note générale : 01 Disponible à la salle de recherche
02 Disponibles au magasin de la bibliothèque centraleLangues : Français (fre) Catégories : Français - Anglais
ChimieTags : Semi-conducteur Photolyse Peroxyde d'hydrogène Herbicides Photo catalyse Sels de fer II et III Ferri oxalate Milieu aqueux Index. décimale : 540 Chimie et sciences connexes Permalink : index.php?lvl=notice_display&id=3855 Transformation directe et indirecte de deux herbicides le 2,4- D et le diuron en solution aqueuse [texte imprimé] / Kamel Ezzine Djebbar ; Univ. de Constantine, Éditeur scientifique ; T. Sehili, Directeur de thèse . - 2002 . - 220 p.
01 Disponible à la salle de recherche
02 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Semi-conducteur Photolyse Peroxyde d'hydrogène Herbicides Photo catalyse Sels de fer II et III Ferri oxalate Milieu aqueux Index. décimale : 540 Chimie et sciences connexes Permalink : index.php?lvl=notice_display&id=3855 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité DJE/3678 DJE/3678 Thèse Bibliothèque principale Thèses Disponible
