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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 : 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 : 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 Etude comparative de la dégradation de colorants de la famille des triphénylméthanes par voies photochimique et sonochimique en solution aqueuse homogène et hétérogène. / Seyfeddine Bendjabeur
Titre : Etude comparative de la dégradation de colorants de la famille des triphénylméthanes par voies photochimique et sonochimique en solution aqueuse homogène et hétérogène. Type de document : texte imprimé Auteurs : Seyfeddine Bendjabeur, Auteur ; Razika Zouaghi, Directeur de thèse Mention d'édition : 10-mars-19 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2019 Importance : 251 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Chimie: Chimie Analytique et Environnement Colorant adsorption Photolyse Procédés d’Oxydations Avancée H2O2 UV TiO2 Photocatalyse sonolyse dye photolysis advanced oxidation processes photocatalysis sonolysis صبغ امتزاز تحلل ضوئي عمليات أكسدة متطورة 2H20 الأشعة فوق البنفسجية و تحفيز ضوئي تحلل صوتي Index. décimale : 540 Chimie et sciences connexes Résumé : This study focused on the elimination of three dyes by several advanced sonochemical and photochemical oxidation processes in a homogeneous and heterogeneous medium as well as by direct photolysis at 254 and 365 nm. In most of the cases studied, a pseudo-first order kinetic law applies correctly to a large part of the reactions. The results obtained in this study indicated that photolysis (UV only) was found to have little effect on the degradation of the three dyes. The removal efficiency can be improved by increasing the intensity of the photonic flux or by decreasing the initial concentration of pollutant.
The coupling of H2O2/UV increases considerably the degradation rate of the three dyes, the efficiency is enhanced by raising the dose of H2O2 up to a limit imposed by the self-inhibition reactions. The DT-DFT method allowed recalculating the theoretical UV-Visible spectra of the three dyes which are comparable to that obtained experimentally. Adsorption and heterogeneous Photocatalysis were influenced by various factors (initial substrate concentration, catalyst type and loading, pH of the solution, addition of hydrogen peroxide, and the presence of inorganic salts). The results showed that the degradation yield of the three dyes is very high when using TiO2-P25, where a complete photocatalytic degradation of 10 mg L-1 of GV, BF and AF was obtained in 25, 30 and 50 minutes in the presence of 1 g L-1 of TiO2 Degussa P25 at natural pH. First-order kinetics described the photocatalytic reaction of the three substrates andthe Langmuir-Hinshelwood model correctly described the photocatalysis processes of the substrates tested. The comparison between various types of catalysts (Degussa P25, Millenium PC500, PC105, PC100, and PC50) gave varied results but Degussa P25 was the most efficient photocatalyst from which it was chosen for this study. The optimum catalyst concentration was 1 g L-1 of TiO2 with an initial concentration of 10 mg L-1 of dye. Finally, the sonochemical degradation of GV by sonolysis at 516 kHz shows that this method is effective for the degradation of this dye. However, this process can be affected by several parameters including, applied electrical power, initial substrate concentration, pHof the solution, the addition of H2O2 and S2O82- and the presence of someinorganic ions.Note de contenu : Annexe.
Diplôme : Doctorat En ligne : ../theses/chimie/BEN7567.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11405 Etude comparative de la dégradation de colorants de la famille des triphénylméthanes par voies photochimique et sonochimique en solution aqueuse homogène et hétérogène. [texte imprimé] / Seyfeddine Bendjabeur, Auteur ; Razika Zouaghi, Directeur de thèse . - 10-mars-19 . - جامعة الإخوة منتوري قسنطينة, 2019 . - 251 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Chimie: Chimie Analytique et Environnement Colorant adsorption Photolyse Procédés d’Oxydations Avancée H2O2 UV TiO2 Photocatalyse sonolyse dye photolysis advanced oxidation processes photocatalysis sonolysis صبغ امتزاز تحلل ضوئي عمليات أكسدة متطورة 2H20 الأشعة فوق البنفسجية و تحفيز ضوئي تحلل صوتي Index. décimale : 540 Chimie et sciences connexes Résumé : This study focused on the elimination of three dyes by several advanced sonochemical and photochemical oxidation processes in a homogeneous and heterogeneous medium as well as by direct photolysis at 254 and 365 nm. In most of the cases studied, a pseudo-first order kinetic law applies correctly to a large part of the reactions. The results obtained in this study indicated that photolysis (UV only) was found to have little effect on the degradation of the three dyes. The removal efficiency can be improved by increasing the intensity of the photonic flux or by decreasing the initial concentration of pollutant.
The coupling of H2O2/UV increases considerably the degradation rate of the three dyes, the efficiency is enhanced by raising the dose of H2O2 up to a limit imposed by the self-inhibition reactions. The DT-DFT method allowed recalculating the theoretical UV-Visible spectra of the three dyes which are comparable to that obtained experimentally. Adsorption and heterogeneous Photocatalysis were influenced by various factors (initial substrate concentration, catalyst type and loading, pH of the solution, addition of hydrogen peroxide, and the presence of inorganic salts). The results showed that the degradation yield of the three dyes is very high when using TiO2-P25, where a complete photocatalytic degradation of 10 mg L-1 of GV, BF and AF was obtained in 25, 30 and 50 minutes in the presence of 1 g L-1 of TiO2 Degussa P25 at natural pH. First-order kinetics described the photocatalytic reaction of the three substrates andthe Langmuir-Hinshelwood model correctly described the photocatalysis processes of the substrates tested. The comparison between various types of catalysts (Degussa P25, Millenium PC500, PC105, PC100, and PC50) gave varied results but Degussa P25 was the most efficient photocatalyst from which it was chosen for this study. The optimum catalyst concentration was 1 g L-1 of TiO2 with an initial concentration of 10 mg L-1 of dye. Finally, the sonochemical degradation of GV by sonolysis at 516 kHz shows that this method is effective for the degradation of this dye. However, this process can be affected by several parameters including, applied electrical power, initial substrate concentration, pHof the solution, the addition of H2O2 and S2O82- and the presence of someinorganic ions.Note de contenu : Annexe.
Diplôme : Doctorat En ligne : ../theses/chimie/BEN7567.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11405 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEN/7567 BEN/7567 Thèse Bibliothèque principale Thèses Disponible
Titre : "Etude comparative de la dégradation photochimique et photocatalytique de quatre colorants: Impact de la structure chimique et corrélation entre l'adsorption et l'activité photocatalytique de TiO2" Type de document : texte imprimé Auteurs : Nour Bouanimba, Auteur ; Razika Zouaghi, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 223 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Colorant Industrie textile Photochimie Adsorption Photocatalyse Catalyseur
Textile industry photochemical Photocatalysis Catalyst
الملون ؛ صناعة الغزل والنسیج ؛ الفوتوكمیائیة ؛ الامتزاز ؛ الفوتوتحفیزیة ؛ المحفزIndex. décimale : 540 Chimie et sciences connexes Résumé : "This study allows us to confirm the influence of the chemical structure of organic dyes on the
effective of their photochemical degradation using (UV-C) at 254 nm and photocatalytic
degradation at 365 nm (UV-A/TiO2 with two different types crystal (TiO2 Degussa-P25 and
Millennium-PC500)). The four dyes chosen in this study are widely used in industry and are
grouped under two types: azo compounds (methyl orange (MeO), methyl red (RMe)),
triphenylmethanes (bromophenol blue (BBP) and bromothymol blue (BBT)). These dyes have
different chemical structures and different substituents, which gives a significant impact on their
reactivity depending the photochemical or photocatalytic processes used, the reaction pathways
of degradation and the type of by-products of degradation. Adsorption is the first step in the
process of photocatalytic degradation of an organic molecule on the surface of TiO2, it was
studied to explain the behavior of some couples photocatalyst/organic compound during the
photocatalytic degradation.
The photochemical degradation of the four dyes using UV at 254 nm resulted to a slow
decolorization of the substrates for the two azo dyes (MeO and RMe) which is not the same for
the two carbonyl dyes (BBP and BBT) where the speed rate is more important. However, the
COD values showed a relatively very low rate of mineralization, which means that the dyes
studied photochemical process, did not lead to significant mineralization. The results also
showed that the degradation rate increases with the decrease of the dye concentration. An
improvement on the rate degradation was observed also when the intensity of the UV light
increased. Decolorization of the four dyes studied depends on the variation of pH. Process
efficiency can be increased by adding an oxidant as (H2O2) in the solution, to accelerate the
degradation we obtained higher yields after 15 minutes of irradiation at a concentration of H2O2
10-2 mol l-1, with the highest for the four dyes studied at this concentration. This results show that
the photochemical process in the presence of oxidizing hydrogen peroxide at 254 nm (UV/H2O2)
was effective for the complete degradation of dyes.
The adsorption kinetic study of the studied dyes shows that the adsorption mechanism over the
two selected catalysts is described by a second pseudo-order kinetic and the dyes adsorption
isotherms were found favorable by the Langmuir approach. The comparative study of the
photocatalytic degradation of aqueous solutions of MeO, RMe, BBP, BBT dyes shows that the
molecular formula of the dyes may be a determining factor influencing the degradation rate. The
P25 catalyst is more effective than the PC500 at different operating conditions studied. The COD
values measured confirm that the photocatalytic process leads to the reduction of the organic
matter until the mineralization of contaminants. The effect of the initial dye concentration,
solution pH, the type and the photocatalyst concentration, electron acceptor such as H2O2 and
inorganic anions (Cl−, HCO3
− and CO3
2−) in the presence of both catalysts are discussed. The
effect of solar energy on the photocatalytic decomposition of dyes and the correlation with the
adsorption was examined. The disappearance of substrates follow a pseudo-first order kinetics
and Langmuir- Hinshelwood model is well suited to describe the kinetics of photocatalytic
disappearance of these dyes. The evolution of apparent rate constant Kapp as a function of pH
indicates that it plays an important role on the kinetics of the dyes degradation. The degradation
efficiency of MeO, RMe, BBP was found to increase at acidic medium, however the reaction of
degradation of BBT increase at alkaline medium. The presence of low H2O2 concentrations
improves the kinetics of photocatalytic disappearance dyes until an optimum. Addition of salts
such as NaCl, Na2CO3 and NaHCO3 significantly reduces decolorization efficiencies. The
sunlight has been found more efficient for decolorization and mineralization of model
compounds than the UV light."
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/BOU6548.pdf Permalink : index.php?lvl=notice_display&id=9663 "Etude comparative de la dégradation photochimique et photocatalytique de quatre colorants: Impact de la structure chimique et corrélation entre l'adsorption et l'activité photocatalytique de TiO2" [texte imprimé] / Nour Bouanimba, Auteur ; Razika Zouaghi, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2014 . - 223 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Colorant Industrie textile Photochimie Adsorption Photocatalyse Catalyseur
Textile industry photochemical Photocatalysis Catalyst
الملون ؛ صناعة الغزل والنسیج ؛ الفوتوكمیائیة ؛ الامتزاز ؛ الفوتوتحفیزیة ؛ المحفزIndex. décimale : 540 Chimie et sciences connexes Résumé : "This study allows us to confirm the influence of the chemical structure of organic dyes on the
effective of their photochemical degradation using (UV-C) at 254 nm and photocatalytic
degradation at 365 nm (UV-A/TiO2 with two different types crystal (TiO2 Degussa-P25 and
Millennium-PC500)). The four dyes chosen in this study are widely used in industry and are
grouped under two types: azo compounds (methyl orange (MeO), methyl red (RMe)),
triphenylmethanes (bromophenol blue (BBP) and bromothymol blue (BBT)). These dyes have
different chemical structures and different substituents, which gives a significant impact on their
reactivity depending the photochemical or photocatalytic processes used, the reaction pathways
of degradation and the type of by-products of degradation. Adsorption is the first step in the
process of photocatalytic degradation of an organic molecule on the surface of TiO2, it was
studied to explain the behavior of some couples photocatalyst/organic compound during the
photocatalytic degradation.
The photochemical degradation of the four dyes using UV at 254 nm resulted to a slow
decolorization of the substrates for the two azo dyes (MeO and RMe) which is not the same for
the two carbonyl dyes (BBP and BBT) where the speed rate is more important. However, the
COD values showed a relatively very low rate of mineralization, which means that the dyes
studied photochemical process, did not lead to significant mineralization. The results also
showed that the degradation rate increases with the decrease of the dye concentration. An
improvement on the rate degradation was observed also when the intensity of the UV light
increased. Decolorization of the four dyes studied depends on the variation of pH. Process
efficiency can be increased by adding an oxidant as (H2O2) in the solution, to accelerate the
degradation we obtained higher yields after 15 minutes of irradiation at a concentration of H2O2
10-2 mol l-1, with the highest for the four dyes studied at this concentration. This results show that
the photochemical process in the presence of oxidizing hydrogen peroxide at 254 nm (UV/H2O2)
was effective for the complete degradation of dyes.
The adsorption kinetic study of the studied dyes shows that the adsorption mechanism over the
two selected catalysts is described by a second pseudo-order kinetic and the dyes adsorption
isotherms were found favorable by the Langmuir approach. The comparative study of the
photocatalytic degradation of aqueous solutions of MeO, RMe, BBP, BBT dyes shows that the
molecular formula of the dyes may be a determining factor influencing the degradation rate. The
P25 catalyst is more effective than the PC500 at different operating conditions studied. The COD
values measured confirm that the photocatalytic process leads to the reduction of the organic
matter until the mineralization of contaminants. The effect of the initial dye concentration,
solution pH, the type and the photocatalyst concentration, electron acceptor such as H2O2 and
inorganic anions (Cl−, HCO3
− and CO3
2−) in the presence of both catalysts are discussed. The
effect of solar energy on the photocatalytic decomposition of dyes and the correlation with the
adsorption was examined. The disappearance of substrates follow a pseudo-first order kinetics
and Langmuir- Hinshelwood model is well suited to describe the kinetics of photocatalytic
disappearance of these dyes. The evolution of apparent rate constant Kapp as a function of pH
indicates that it plays an important role on the kinetics of the dyes degradation. The degradation
efficiency of MeO, RMe, BBP was found to increase at acidic medium, however the reaction of
degradation of BBT increase at alkaline medium. The presence of low H2O2 concentrations
improves the kinetics of photocatalytic disappearance dyes until an optimum. Addition of salts
such as NaCl, Na2CO3 and NaHCO3 significantly reduces decolorization efficiencies. The
sunlight has been found more efficient for decolorization and mineralization of model
compounds than the UV light."
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/BOU6548.pdf Permalink : index.php?lvl=notice_display&id=9663 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/6548 BOU/6548 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 : 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 . - 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 : 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 : Etude de la pollution mercurielle des eaux et des sediments dans la région de Azzaba Type de document : texte imprimé Auteurs : Razika Zouaghi ; M. Martin-Bouyer, Directeur de thèse ; Univ. de Constantine, Éditeur scientifique Année de publication : 1992 Importance : 97 f. Note générale : 03 Disponibles au magasin de la bibliothèque centrale Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Eau Sédiment Pollution mercurielle Index. décimale : 540 Chimie et sciences connexes Permalink : index.php?lvl=notice_display&id=4141 Etude de la pollution mercurielle des eaux et des sediments dans la région de Azzaba [texte imprimé] / Razika Zouaghi ; M. Martin-Bouyer, Directeur de thèse ; Univ. de Constantine, Éditeur scientifique . - 1992 . - 97 f.
03 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Eau Sédiment Pollution mercurielle Index. décimale : 540 Chimie et sciences connexes Permalink : index.php?lvl=notice_display&id=4141 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ZOU/2255 ZOU/2255 Thèse Bibliothèque principale Thèses Disponible
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