{"id":6683,"date":"2021-10-28T11:20:33","date_gmt":"2021-10-28T09:20:33","guid":{"rendered":"https:\/\/www.ummto.dz\/fs\/?p=6683"},"modified":"2021-11-29T08:30:57","modified_gmt":"2021-11-29T07:30:57","slug":"avis-de-soutenance-de-doctorat-3eme-cycle-en-chimie-specialite-chimie-de-lenvironnement-de-mme-yahiaoui-nouara-le-03-11-2021","status":"publish","type":"post","link":"https:\/\/www.ummto.dz\/fs\/avis-de-soutenance-de-doctorat-3eme-cycle-en-chimie-specialite-chimie-de-lenvironnement-de-mme-yahiaoui-nouara-le-03-11-2021\/","title":{"rendered":"Avis de soutenance de doctorat Es-Sciences en Chimie de Mme YAHIAOUI Nouara le 03\/11\/2021"},"content":{"rendered":"

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Mme\u00a0: YAHIAOUI Nouara<\/span><\/strong><\/p>\n

Soutiendra sa th\u00e8se de Doctorat en chimie
<\/strong><\/span><\/p>\n

Intitul\u00e9 :<\/span><\/strong>\u00a0\u00ab<\/span>\u00a0Traitement et de la margine d\u2019olive par le proc\u00e9d\u00e9 de la co-pr\u00e9cipitation en utilisant l\u2019hydroxyapatie. <\/span><\/strong>\u00bb.<\/span> <\/strong><\/p>\n

Le\u00a0:<\/span> 03 Novembre 2021<\/span><\/strong> \u00e0 <\/strong>Salle de<\/span> conf\u00e9rences de la facult\u00e9 des Sciences (4\u00e8me \u00e9tage)<\/span> \u00e0 09h\u00a0:30<\/span><\/strong><\/p>\n

Directeur de Th\u00e8se\u00a0: Professeur MOUSAOUI Ramdane<\/strong><\/span><\/p>\n

 <\/p>\n

\u00a0Devant le jury d\u2019examen suivant<\/u>\u00a0:<\/u><\/strong><\/span><\/p>\n\n\n\n\n\n\n\n\n
M. \u00a0ELIAS\u00a0\u00a0 \u00a0Abdelhamid<\/strong><\/span><\/td>\nProfesseur<\/strong><\/span><\/td>\nUMMTO<\/strong><\/span><\/td>\nPr\u00e9sident<\/strong><\/span><\/td>\n<\/tr>\n
M. MOUSAOUI\u00a0\u00a0\u00a0\u00a0 Ramdane<\/strong><\/span><\/td>\nProfesseur<\/strong><\/span><\/td>\nUMMTO<\/strong><\/span><\/td>\n\u00a0Directeur de th\u00e8se<\/strong><\/span><\/td>\n<\/tr>\n
M. KADI\u00a0\u00a0\u00a0\u00a0\u00a0 Hocine<\/strong><\/span><\/td>\nProfesseur<\/strong><\/span><\/td>\nUMMTO<\/strong><\/span><\/td>\nCo-directeur<\/strong><\/span><\/td>\n<\/tr>\n
M. BENAICHA\u00a0\u00a0\u00a0 Mohamed<\/strong><\/span><\/td>\nProfesseur<\/strong><\/span><\/td>\nUFA-Setif<\/strong><\/span><\/td>\nExaminateur<\/strong><\/span><\/td>\n<\/tr>\n
Mme BELHANECHE\u00a0\u00a0 Naima<\/strong><\/span><\/td>\nProfesseur<\/strong><\/span><\/td>\nENP-Alger<\/strong><\/span><\/td>\n\u00a0\u00a0 Examinatrice<\/strong><\/span><\/td>\n<\/tr>\n
M. CHEMAT\u00a0 Smail \u00a0\u00a0\u00a0<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong><\/td>\nDirecteur de recherche<\/strong><\/span><\/td>\nCRAPC Alger<\/strong><\/span><\/td>\n\u00a0 Examinateur<\/span><\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

R\u00e9sum\u00e9:<\/strong><\/a> <\/span><\/p>\n

L\u2019objectif de cette \u00e9tude r\u00e9side dans l\u2019\u00e9laboration d\u2019une hydroxyapatite par la m\u00e9thode de pr\u00e9cipitation pour la r\u00e9duction des compos\u00e9s ph\u00e9noliques et la DCO des margines d\u2019olive par le proc\u00e9d\u00e9 de copr\u00e9cipitation. \u00a0\u00a0 \u00a0Les r\u00e9sultats de l\u2019optimisation du proc\u00e9d\u00e9 de la synth\u00e8se de l\u2019hydroxyapatite par la technique des surfaces de r\u00e9ponse ont montr\u00e9 que l’hydroxyapatite st\u0153chiom\u00e9trique (avec Ca\/P = 1,67) a \u00e9t\u00e9 obtenue en utilisant un rapport molaire Ca\/P de 1.70 en r\u00e9actifs, une concentration\u00a0 en ions Ca2+ de 1.50 M et une dur\u00e9e de r\u00e9action de 45h. \u00a0\u00a0\u00a0\u00a0 L\u2019\u00e9tude de la copr\u00e9cipitation des compos\u00e9s ph\u00e9noliques et la DCO des margines par l\u2019hydroxyapatite synth\u00e9tis\u00e9e a \u00e9t\u00e9 effectu\u00e9e en appliquant la m\u00e9thodologie de la recherche exp\u00e9rimentale. Cette d\u00e9marche nous a permis d\u2019identifier rapidement les facteurs influents sur le proc\u00e9d\u00e9 ainsi que les \u00e9ventuelles interactions entre ces derniers. Les meilleures r\u00e9ductions des compos\u00e9s ph\u00e9noliques (87,30 %) et de la DCO (76,30 %) de la margine sont obtenues \u00e0 pH 12, avec un rapport solide \/ liquide (Hydroxyapatite \/ margine) de 10 g\/L pendant une dur\u00e9e de r\u00e9action de 30 min. \u00a0\u00a0\u00a0 L\u2019extraction des compos\u00e9s ph\u00e9noliques \u00e0 partir de l\u2019hydroxyapatite charg\u00e9e en utilisant l\u2019\u00e9ther di\u00e9thylique comme solvant avec un rapport liquide\/solide de 40 mL\/g nous a permis de r\u00e9cup\u00e9rer 25.50 % des polyph\u00e9nols. La r\u00e9utilisation de l\u2019hydroxyapatite r\u00e9g\u00e9n\u00e9r\u00e9e par calcination dans le traitement de la margine par le m\u00eame proc\u00e9d\u00e9 a permis l\u2019obtention d\u2019un bon pouvoir de r\u00e9duction des teneurs en DCO et en compos\u00e9s ph\u00e9noliques. \u00a0La mod\u00e9lisation de la cin\u00e9tique de la r\u00e9action de copr\u00e9cipitation par les plusieurs mod\u00e8les math\u00e9matiques a montr\u00e9 que le mod\u00e8le logarithmique pr\u00e9sente le meilleur ajustement des concentrations pr\u00e9dites par la m\u00e9thodologie des surfaces de r\u00e9ponses. Ce dernier correspond \u00e0 la cin\u00e9tique du premier ordre. \u00a0 \u00a0 \u00a0 \u00a0<\/a><\/span><\/p>\n

\u00a0\u00a0\u00a0 Mots cl\u00e9s\u00a0<\/span> <\/span><\/strong><\/p>\n

Margine, hydroxyapatite, compos\u00e9s ph\u00e9noliques, DCO, copr\u00e9cipitation,\u00a0 extraction, calcination, cin\u00e9tique et plans d\u2019exp\u00e9riences.<\/span><\/p>\n

Abstract<\/span><\/strong><\/p>\n

\u00a0\u00a0\u00a0 The aim of this study was to synthesize hydroxyapatite by precipitation method for reducing the phenolic compounds and COD in olive mill wastewater by the co-precipitation process.<\/span><\/p>\n

\u00a0\u00a0\u00a0 Results of the optimization synthesis of hydroxyapatite by the response surface technique showed that the stoichiometric hydroxyapatite (with Ca\/P = 1.67) was obtained using reagents Ca\/P molar ratio of 1.70, Ca 2+<\/sup> concentration of 1.50 M and reaction time of 45 h.<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0 The co-precipitation process of phenolic compounds and COD with synthesized hydroxyapatite was carried out using experimental methodology. This approach allowed us to quickly identify the influencing factors on the process and the interactions between them. The best reductions of phenolic compounds (87, 30%) and COD (76, 30%) were obtained at pH 12 with solid\/liquid ratio of 10 g\/L and reaction time of 30 min.<\/span><\/p>\n

\u00a0\u00a0\u00a0 Phenolic compounds extraction from the charged hydroxyapatite using diethyl ether as solvent with a liquid \/solid ratio of 40 mL\/g allowed us to recover 25.50% of polyphenols. Reuse of regenerated hydroxyapatite by calcination in olive mill wastewater treatment by the same process allowed for a good reduction of phenolic compounds and COD.<\/span><\/p>\n

\u00a0\u00a0\u00a0 Kinetic modeling of the co-precipitation process by several mathematical models showed that the logarithmic model fits better the predicted concentrations by the response surface methodology. This model corresponds to the kinetic of the first order.<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0 Key words <\/strong><\/span><\/p>\n

Olive mill wastewater, hydroxyapatite, phenolic compounds, COD,\u00a0<\/span><\/p>\n

co-precipitation, extraction, calcination, kinetics and experimental designs.<\/span><\/p>\n

 <\/p>\n

\u00a0<\/strong><\/span><\/p>\n

\u00a0<\/strong><\/p>\n

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Mme\u00a0: YAHIAOUI Nouara Soutiendra sa th\u00e8se de Doctorat en chimie Intitul\u00e9 :\u00a0\u00ab\u00a0Traitement et de la margine d\u2019olive par le proc\u00e9d\u00e9 de la co-pr\u00e9cipitation en utilisant l\u2019hydroxyapatie. \u00bb. Le\u00a0: 03 Novembre 2021 \u00e0 Salle de conf\u00e9rences de la facult\u00e9 des Sciences (4\u00e8me \u00e9tage) \u00e0 09h\u00a0:30 Directeur de Th\u00e8se\u00a0: Professeur MOUSAOUI Ramdane   \u00a0Devant le jury d\u2019examen […]<\/p>\n","protected":false},"author":13,"featured_media":5807,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-6683","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classe"],"yoast_head":"\nAvis de soutenance de doctorat Es-Sciences en Chimie de Mme YAHIAOUI Nouara le 03\/11\/2021 - Facult\u00e9 des Sciences<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ummto.dz\/fs\/avis-de-soutenance-de-doctorat-3eme-cycle-en-chimie-specialite-chimie-de-lenvironnement-de-mme-yahiaoui-nouara-le-03-11-2021\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Avis de soutenance de doctorat Es-Sciences en Chimie de Mme YAHIAOUI Nouara le 03\/11\/2021 - Facult\u00e9 des Sciences\" \/>\n<meta property=\"og:description\" content=\"Mme\u00a0: YAHIAOUI Nouara Soutiendra sa th\u00e8se de Doctorat en chimie Intitul\u00e9 :\u00a0\u00ab\u00a0Traitement et de la margine d\u2019olive par le proc\u00e9d\u00e9 de la co-pr\u00e9cipitation en utilisant l\u2019hydroxyapatie. \u00bb. 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