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Auteur Moulay Abderrahmane Malouki |
Documents disponibles écrits par cet auteur (5)
Affiner la recherche Interroger des sources externesElimination de deux polluants organiques par photo-induction en phase homogène et hétérogène et par adsorption sur des supports inorganiques locaux. / Badis Khennaoui
Titre : Elimination de deux polluants organiques par photo-induction en phase homogène et hétérogène et par adsorption sur des supports inorganiques locaux. Type de document : texte imprimé Auteurs : Badis Khennaoui, Auteur ; Moulay Abderrahmane Malouki, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 164 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles. Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Processus avancés d'oxydation Photo-Fenton hétérogène Photodégradation Polluants Photocatalyseur Advanced oxidation processes heterogeneous Photo-Fenton Photodegradation Pollutants Photocatalyst عميات الأكسدة المتقدمة فوتو-فنتون غير متجانسة التحلل الضوئي الملوثات التحفيز الضوئي Index. décimale : 540 Chimie et sciences connexes Résumé : This work aims to study and evaluate the efficiency of a photo- catalytic process photoFenton-type for the removal from aqueous medium of an azo dye (orange methyl) and a pesticide (linuron) belonging to phenylurea family. It was for objective to study (or to investigate) the photocatalytic activity of a local clay rich in iron oxide for the degradation of certain kind of organic compounds, in particular dyes and pesticides.
The first part of this work has been devoted to the acquisition of some local clay and the obtaining of their characteristic properties by a few characterization methods such as: thermal analysis (ATD and ATG), scanning electron microscope, X-ray diffraction, UV-visible spectroscopy and X-ray fluorescence.
The adsorption kinetics of two pollutants showed that the equilibrium is reached practically in 30 minutes. The adsorption rate was rapid at the first 15 minutes of the process and then becomes slow for the rest of stirring time to reach equilibrium after 30 minutes.
The photo-degradation process of heterogeneous photo-Fenton type (clay/pollutant/oxalic acid/UV system) was studied by monitoring the change in the concentration of organic pollutants using the UV-Vis spectroscopic analysis technique as a function of irradiation time.
The degradation was studied by investigating the effect of different operational parameters such as: the initial pH, the concentration of the catalyst and the concentration of organic materials.
The results indicated that the photodegradation rate of two pollutants was clearly increased in the presence of clay compared with the direct photolysis. The introduction of oxalic acid considerably improved the photocatalytic process (about 90% removal). The optimal conditions for a better degradation were obtained for: [clay] = 1 g/L and acidic pH (between 3 and 4) in the presence of [oxalic acid] = 10-2 M.
The exposition of the photocatalytic system to sunlight causes the disappearance the organic pollutant in a significant way. This fact is very promising and highlighting the possibility of using sunlight, a source of renewable and free energy as an alternative to UV radiations for the elimination of organic pollutants from the aquatic environment.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/KHE7205.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10758 Elimination de deux polluants organiques par photo-induction en phase homogène et hétérogène et par adsorption sur des supports inorganiques locaux. [texte imprimé] / Badis Khennaoui, Auteur ; Moulay Abderrahmane Malouki, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 164 f. ; 30 cm.
2 copies imprimées disponibles.
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Processus avancés d'oxydation Photo-Fenton hétérogène Photodégradation Polluants Photocatalyseur Advanced oxidation processes heterogeneous Photo-Fenton Photodegradation Pollutants Photocatalyst عميات الأكسدة المتقدمة فوتو-فنتون غير متجانسة التحلل الضوئي الملوثات التحفيز الضوئي Index. décimale : 540 Chimie et sciences connexes Résumé : This work aims to study and evaluate the efficiency of a photo- catalytic process photoFenton-type for the removal from aqueous medium of an azo dye (orange methyl) and a pesticide (linuron) belonging to phenylurea family. It was for objective to study (or to investigate) the photocatalytic activity of a local clay rich in iron oxide for the degradation of certain kind of organic compounds, in particular dyes and pesticides.
The first part of this work has been devoted to the acquisition of some local clay and the obtaining of their characteristic properties by a few characterization methods such as: thermal analysis (ATD and ATG), scanning electron microscope, X-ray diffraction, UV-visible spectroscopy and X-ray fluorescence.
The adsorption kinetics of two pollutants showed that the equilibrium is reached practically in 30 minutes. The adsorption rate was rapid at the first 15 minutes of the process and then becomes slow for the rest of stirring time to reach equilibrium after 30 minutes.
The photo-degradation process of heterogeneous photo-Fenton type (clay/pollutant/oxalic acid/UV system) was studied by monitoring the change in the concentration of organic pollutants using the UV-Vis spectroscopic analysis technique as a function of irradiation time.
The degradation was studied by investigating the effect of different operational parameters such as: the initial pH, the concentration of the catalyst and the concentration of organic materials.
The results indicated that the photodegradation rate of two pollutants was clearly increased in the presence of clay compared with the direct photolysis. The introduction of oxalic acid considerably improved the photocatalytic process (about 90% removal). The optimal conditions for a better degradation were obtained for: [clay] = 1 g/L and acidic pH (between 3 and 4) in the presence of [oxalic acid] = 10-2 M.
The exposition of the photocatalytic system to sunlight causes the disappearance the organic pollutant in a significant way. This fact is very promising and highlighting the possibility of using sunlight, a source of renewable and free energy as an alternative to UV radiations for the elimination of organic pollutants from the aquatic environment.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/KHE7205.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10758 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KHE/7205 KHE/7205 Thèse Bibliothèque principale Thèses Disponible 
Titre : Elimination de polluants organiques par voies physico-chimique et photochimique : Cas de l’élimination du méthabenzthiazuron et de 2-mercaptobenzothiazole Type de document : texte imprimé Auteurs : Abdelfattah Allaoui, Auteur ; Moulay Abderrahmane Malouki, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : photocatalyseur, 2-mercaptobenzothiazole, methabenzothiazuron, argiles
naturelles, photodégradation
photocatalyst, 2-mercaptobenzothiazole, methabenzothiazuron, natural clay,
photodegradation
محفز ضوئي - 2-ميركابتوبنزوتيازول -ميتابنزتيازيرون- الطين الطبيعي-التفكك الضوئيIndex. décimale : 540 Chimie et sciences connexes Résumé : This study is a contribution to the elimination of organic pollutants by photochemical
and physico-chemical methods in aqueous medium and on solid supports. Two benzothiazole
derivatives, 2-mercaptobenzothiazol (MBT) and methabenzthiazuron (MBTU) has been
studied.
In a first step the photochemical behaviour of pollutants on clay surface has been
studied. Two commercial clays (Montmorillonite and Kaolinite) and three natural clays (A, B
and C) of El-golea (Ghardaia-Algeria) region were selected for this study. Along the study of
pollutants photodegradation in suspension (heterogenic phase) no evident photoinductive
effect has been observed, but mainly adsorption phenomena. Montmorillonite showed a
stronger capacity of adsorption in the case of MBTU (adsorbed amount » 9mg.g-1) over other
clays with 1mg.g-1. Moreover, the adsorbed amount of MBT was less then 1mg.g-1 with all
clays. The photodegradation products were produced in lower concentration but revealed to
be similar to those observed by direct photolysis thus confirming the involvement of screen
effect.
The results on dried phase showed that clay have a great efficiency in the elimination
of pollutants. The disappearance rate of MBT up to 95% after 100 h of irradiation on
Kaolinite and clay A while the complete elimination is reached after the same irradiation time
on clay B. Montmorillonite with MBTU presented a higher efficiency compared to other clays
(72% of disappearance).
In the second step the photochemical degradation of benzothiazole derivatives, 2-
mercaptobenzothiazol (MBT, 0,1mM) and methabezthiazuron (MBTU, 0,1mM) has been
studied in aqueous solution in the presence of decatungstate anion DTA (W10O32
-4 , 0,5g/l)
used as photocatalyst under irradiation at 365nm.
The total mineralization of MBT and MBTU has been obtained in the presence of
DTA after 100 and 170 h of irradiation respectively. This result attests the possibility of the
potential application of DTA in the elimination of different organic pollutants, particularly
benzothiazole derivatives.Diplôme : Doctorat en sciences En ligne : ../theses/chimie/ALL6615.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9735 Elimination de polluants organiques par voies physico-chimique et photochimique : Cas de l’élimination du méthabenzthiazuron et de 2-mercaptobenzothiazole [texte imprimé] / Abdelfattah Allaoui, Auteur ; Moulay Abderrahmane Malouki, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2014.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : photocatalyseur, 2-mercaptobenzothiazole, methabenzothiazuron, argiles
naturelles, photodégradation
photocatalyst, 2-mercaptobenzothiazole, methabenzothiazuron, natural clay,
photodegradation
محفز ضوئي - 2-ميركابتوبنزوتيازول -ميتابنزتيازيرون- الطين الطبيعي-التفكك الضوئيIndex. décimale : 540 Chimie et sciences connexes Résumé : This study is a contribution to the elimination of organic pollutants by photochemical
and physico-chemical methods in aqueous medium and on solid supports. Two benzothiazole
derivatives, 2-mercaptobenzothiazol (MBT) and methabenzthiazuron (MBTU) has been
studied.
In a first step the photochemical behaviour of pollutants on clay surface has been
studied. Two commercial clays (Montmorillonite and Kaolinite) and three natural clays (A, B
and C) of El-golea (Ghardaia-Algeria) region were selected for this study. Along the study of
pollutants photodegradation in suspension (heterogenic phase) no evident photoinductive
effect has been observed, but mainly adsorption phenomena. Montmorillonite showed a
stronger capacity of adsorption in the case of MBTU (adsorbed amount » 9mg.g-1) over other
clays with 1mg.g-1. Moreover, the adsorbed amount of MBT was less then 1mg.g-1 with all
clays. The photodegradation products were produced in lower concentration but revealed to
be similar to those observed by direct photolysis thus confirming the involvement of screen
effect.
The results on dried phase showed that clay have a great efficiency in the elimination
of pollutants. The disappearance rate of MBT up to 95% after 100 h of irradiation on
Kaolinite and clay A while the complete elimination is reached after the same irradiation time
on clay B. Montmorillonite with MBTU presented a higher efficiency compared to other clays
(72% of disappearance).
In the second step the photochemical degradation of benzothiazole derivatives, 2-
mercaptobenzothiazol (MBT, 0,1mM) and methabezthiazuron (MBTU, 0,1mM) has been
studied in aqueous solution in the presence of decatungstate anion DTA (W10O32
-4 , 0,5g/l)
used as photocatalyst under irradiation at 365nm.
The total mineralization of MBT and MBTU has been obtained in the presence of
DTA after 100 and 170 h of irradiation respectively. This result attests the possibility of the
potential application of DTA in the elimination of different organic pollutants, particularly
benzothiazole derivatives.Diplôme : Doctorat en sciences En ligne : ../theses/chimie/ALL6615.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9735 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ALL/6615 ALL/6615 Thèse Bibliothèque principale Thèses Disponible Documents numériques
texte intégreAdobe Acrobat PDF
Titre : Photo et/ou biotransformation de l'ioxynil et de quelques dérivés benzothiazoliques Type de document : texte imprimé Auteurs : Moulay Abderrahmane Malouki ; Univ. de Constantine, Éditeur scientifique ; Abdennour Zertal, Directeur de thèse Année de publication : 2004 Importance : 185 p. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la bibliothèque centrale Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Ioxynil Dérivés benzothiazoliques Index. décimale : 540 Chimie et sciences connexes Permalink : index.php?lvl=notice_display&id=4081 Photo et/ou biotransformation de l'ioxynil et de quelques dérivés benzothiazoliques [texte imprimé] / Moulay Abderrahmane Malouki ; Univ. de Constantine, Éditeur scientifique ; Abdennour Zertal, Directeur de thèse . - 2004 . - 185 p.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Ioxynil Dérivés benzothiazoliques Index. décimale : 540 Chimie et sciences connexes Permalink : index.php?lvl=notice_display&id=4081 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MAL/4173 MAL/4173 Thèse Bibliothèque principale Thèses Disponible
Titre : Simulated sunlight photodegradation of an organic pollutant by heterogeneous photo-Fenton-like processes: case of 2-mercaptobenzothiazole using a local natural clay powder. Titre original : Photodégradation d'un polluant organique sous la lumière solaire simulée, par un processus type photo-Fenton hétérogène: cas de photodégradation du 2-mercaptobenzothiazole en présence d’une poudre argileuse naturelle locale. Type de document : texte imprimé Auteurs : Zakaria Redouane Salah, Auteur ; Moulay Abderrahmane Malouki, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 163 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Anglais (eng) Catégories : Français - Anglais
ChimieTags : MBT heterogeneous photo-Fenton process natural clay powder (NCP) photodegradation hydroxyl radical simulated sunlight irradiation procédé photo-Fenton hétérogène poudre d'argile naturelle photodégradation radical hydroxyle irradiation solaire simulée مبت عملیة فوتو فنتون غیر متجانسة مسحوق الطین الطبیعي تحلل ضوئي جذر ھیدروكسیلي محاكاة أشعة الشمس أشعة مافوق بنفسجیة أ آلیة التفاعل Index. décimale : 540 Chimie et sciences connexes Résumé : The problem of water pollution has been an environmental concern for many years, which lead researchers around the world to looking for effective methods to solve this issue. The incapability of conventional methods to remove effectively biorecalcitrant and toxic pollutants, have promoted the research of more efficient and ecologically friendly water treatment technologies.
In the same aspect, this thesis is a small contribution to the development of a new advanced oxidation process considered as promising and clean method for the destruction of water pollutants. In this process we investigated the efficiency of untreated local natural clay rich in iron oxides as a cost-free photocatalyst for the
degradation of a persistent organic pollutant under simulated sunlight irradiation. The targeted pollutant was: 2-mercaptobenzothiazole (MBT). The study showed that:
Firstly, the adsorption capacity, kinetics and isotherms models were examined in thedark.
Secondly, experiments of degradation by heterogeneous Fenton process under variousoperational parameters were investigated.And then, we focused our research on the photodegradation of MBT by heterogeneous photo-Fenton process using the same natural clay powder (NCP) as photocatalyst and under simulated sunlight irradiation. Experiments were conducted at natural pH with a bath reactor equipped with a medium-pressure Hg lamp emitting mainly at 366 nm. The natural clay was crushed into small homogeneous particles (powder) and then characterized by SEM-EDS, UV-Vis diffuse reflectance spectroscopy, XRF and XRD analysis. The specific BET surface area measured for the clay was 30.22 m²·g-1.
Our main results indicated that, the photodegradation of MBT follows first order (for direct photolysis) or pseudo-first order kinetics (for photocatalysis) Direct photolysis of MBT showed a negligible effect both upon 254 and 365 nm irradiation, while 42.5% and 62% of MBT was eliminated in 3 h under 310 nm irradiation in the presence of H2O2, and under sunlight irradiation (using NCP), respectively. Kinetic runs carried out with 5,0.10-5M MBT and 0.5g·L-1clay showed higher MBT conversion and photodegradation rate at basic pH and in oxygenated
media.
The photodegradation of MBT is mainly attributed to reaction with HO, leading to different intermediates that have been identified by HPLC-MS. A reaction mechanism is proposed at the end of our thesis. The highest TOC removals were obtained using UVA at low pHs, in the absence of O2 with 68% and 65% TOC removal respectively.
The presence of oxalic acid and H2O2 enhanced significantly MBT photodegradation.
Finally, the obtained results support the use of natural clay rich in iron oxides as a free, clean and efficient photocatalysts for water pollutants abatement.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/RED7300.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10915 Simulated sunlight photodegradation of an organic pollutant by heterogeneous photo-Fenton-like processes: case of 2-mercaptobenzothiazole using a local natural clay powder. = Photodégradation d'un polluant organique sous la lumière solaire simulée, par un processus type photo-Fenton hétérogène: cas de photodégradation du 2-mercaptobenzothiazole en présence d’une poudre argileuse naturelle locale. [texte imprimé] / Zakaria Redouane Salah, Auteur ; Moulay Abderrahmane Malouki, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 163 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Anglais (eng)
Catégories : Français - Anglais
ChimieTags : MBT heterogeneous photo-Fenton process natural clay powder (NCP) photodegradation hydroxyl radical simulated sunlight irradiation procédé photo-Fenton hétérogène poudre d'argile naturelle photodégradation radical hydroxyle irradiation solaire simulée مبت عملیة فوتو فنتون غیر متجانسة مسحوق الطین الطبیعي تحلل ضوئي جذر ھیدروكسیلي محاكاة أشعة الشمس أشعة مافوق بنفسجیة أ آلیة التفاعل Index. décimale : 540 Chimie et sciences connexes Résumé : The problem of water pollution has been an environmental concern for many years, which lead researchers around the world to looking for effective methods to solve this issue. The incapability of conventional methods to remove effectively biorecalcitrant and toxic pollutants, have promoted the research of more efficient and ecologically friendly water treatment technologies.
In the same aspect, this thesis is a small contribution to the development of a new advanced oxidation process considered as promising and clean method for the destruction of water pollutants. In this process we investigated the efficiency of untreated local natural clay rich in iron oxides as a cost-free photocatalyst for the
degradation of a persistent organic pollutant under simulated sunlight irradiation. The targeted pollutant was: 2-mercaptobenzothiazole (MBT). The study showed that:
Firstly, the adsorption capacity, kinetics and isotherms models were examined in thedark.
Secondly, experiments of degradation by heterogeneous Fenton process under variousoperational parameters were investigated.And then, we focused our research on the photodegradation of MBT by heterogeneous photo-Fenton process using the same natural clay powder (NCP) as photocatalyst and under simulated sunlight irradiation. Experiments were conducted at natural pH with a bath reactor equipped with a medium-pressure Hg lamp emitting mainly at 366 nm. The natural clay was crushed into small homogeneous particles (powder) and then characterized by SEM-EDS, UV-Vis diffuse reflectance spectroscopy, XRF and XRD analysis. The specific BET surface area measured for the clay was 30.22 m²·g-1.
Our main results indicated that, the photodegradation of MBT follows first order (for direct photolysis) or pseudo-first order kinetics (for photocatalysis) Direct photolysis of MBT showed a negligible effect both upon 254 and 365 nm irradiation, while 42.5% and 62% of MBT was eliminated in 3 h under 310 nm irradiation in the presence of H2O2, and under sunlight irradiation (using NCP), respectively. Kinetic runs carried out with 5,0.10-5M MBT and 0.5g·L-1clay showed higher MBT conversion and photodegradation rate at basic pH and in oxygenated
media.
The photodegradation of MBT is mainly attributed to reaction with HO, leading to different intermediates that have been identified by HPLC-MS. A reaction mechanism is proposed at the end of our thesis. The highest TOC removals were obtained using UVA at low pHs, in the absence of O2 with 68% and 65% TOC removal respectively.
The presence of oxalic acid and H2O2 enhanced significantly MBT photodegradation.
Finally, the obtained results support the use of natural clay rich in iron oxides as a free, clean and efficient photocatalysts for water pollutants abatement.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/RED7300.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10915 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité RED/7300 RED/7300 Thèse Bibliothèque principale Thèses Disponible
Titre : Traitement des eaux par photocatalyse et dégradation des cresls Type de document : texte imprimé Auteurs : Moulay Abderrahmane Malouki ; Univ. de Constantine, Éditeur scientifique ; T. Sehili, Directeur de thèse Année de publication : 1995 Importance : 92 f. Note générale : 2 Disponibles au magasin de la bibliothèque centrale Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Photocatalyse Eau Index. décimale : 540 Chimie et sciences connexes Diplôme : Magistère Permalink : index.php?lvl=notice_display&id=3829 Traitement des eaux par photocatalyse et dégradation des cresls [texte imprimé] / Moulay Abderrahmane Malouki ; Univ. de Constantine, Éditeur scientifique ; T. Sehili, Directeur de thèse . - 1995 . - 92 f.
2 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Photocatalyse Eau Index. décimale : 540 Chimie et sciences connexes Diplôme : Magistère Permalink : index.php?lvl=notice_display&id=3829 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MAL/2776 MAL/2776 Thèse Bibliothèque principale Thèses Disponible
