{"id":6625,"date":"2020-10-20T09:37:17","date_gmt":"2020-10-20T07:37:17","guid":{"rendered":"https:\/\/www.mio.osupytheas.fr\/fr\/youssef-el-ouardi-equipe-cem-soutiendra-sa-these-le-10-novembre-2020-salle-des-actes-batiment-eve-en-visio\/"},"modified":"2020-10-20T09:37:17","modified_gmt":"2020-10-20T07:37:17","slug":"youssef-el-ouardi-equipe-cem-will-present-his-thesis-on-10-november-2020-salle-des-actes-batiment-eve-en-visio","status":"publish","type":"post","link":"https:\/\/www.mio.osupytheas.fr\/en\/youssef-el-ouardi-equipe-cem-soutiendra-sa-these-le-10-novembre-2020-salle-des-actes-batiment-eve-en-visio\/","title":{"rendered":"Youssef EL OUARDI (CEM team) will defend his thesis on 10 November 2020, in the Salle des actes in the EVE building, by videoconference."},"content":{"rendered":"
<\/div> <\/div> <\/div>

On the following subject: Modified bentonite and diatomite versus ion-imprinted polymers: towards new materials for extracting nickel and silver from contaminated effluents<\/p>

Co-supervised thesis: Sidi Mohammed Ben Abdallah University<\/p>

Faculty of Sciences Dhar El Mahraz - Fez<\/p>

Centre for doctoral studies in Science and Technology<\/p>

Doctoral training: Materials Science and Industrial Processes<\/p>

Specialism: Materials science for energy and the environment<\/p>

&<\/p>

Toulon University<\/p>

Doctoral school: \u00c9COLE DOCTORALE MER ET SCIENCES (ED 548)<\/p>

Discipline: Chemistry<\/p>

Speciality: Materials and Environmental Engineering<\/p>

\u00a0<\/p>

Composition of the jury :<\/p>

Prof. Mohammed LACHKAR Universit\u00e9 Sidi Mohamed Ben Abdellah F\u00e8s, Chairman<\/p>

Prof. Nicolas MARMIER University of Nice Sophia Antipolis, Rapporteur<\/p>

Prof. Abdeljalil BENLHACHEMI Ibn Zohr University, Agadir, Rapporteur<\/p>

Pr. Fouad KHALIL Faculty of Science and Technology Fez, Rapporteur<\/p>

Prof. Pascale PRUDENT University of Aix-Marseille, Examiner<\/p>

Prof. V\u00e9ronique LENOBLE University of Toulon, Co-supervisor<\/p>

Pr. Catherine BRANGER University of Toulon, Thesis supervisor<\/p>

Pr. Abdelkrim OUAMMOU Universit\u00e9 Sidi Mohamed Ben Abdellah F\u00e8s, Thesis supervisor<\/p>

Summary:<\/p>

The copper smelting plants in the city of Fez produce effluent that is highly contaminated with metallic elements such as nickel, silver, lead, copper and zinc. This effluent, discharged directly into the public sewer system, has a negative impact on the nearby wastewater treatment plant. It is therefore necessary to decontaminate this effluent before it is treated. In this context, the objectives of this work were to recover natural mineral substances, bentonite and diatomite, ores that are abundant in the national soil and little exploited in Morocco, for use as nickel and silver adsorption phases. The aim of this work was to modify the physico-chemical properties of these natural materials to maximise their adsorption capacity. In the first stage, diatomite was modified by heat treatment at various temperatures (from 550 to 950\u00b0C). Diatomite calcined at 550\u00b0C showed the best adsorption capacity for nickel and silver. The second stage involved modifying the bentonite by heat treatment (550\u00b0C and 750\u00b0C), chemical activation with sodium carbonate and combined chemical and thermal activation at 450\u00b0C. Bentonites modified by chemical activation with sodium carbonate and by combined chemical and thermal activation at 450\u00b0C show the best results. In addition, nickel ion imprinted polymers (IIPs) were considered as alternative materials to replace natural materials in order to improve selectivity. The final part consisted in comparing the performances of these materials, in order to select the best material for future application in the depollution of contaminated effluents prior to their treatment by the wastewater treatment plant of the city of Fez. Residual nickel and silver concentrations became negligible in the natural samples after adsorption by the materials studied in this work, which meets Environmental Quality Standards perfectly. These results have successfully validated the use of natural and synthetic materials for extracting nickel and silver from contaminated effluents.<\/p><\/div><\/div><\/div> <\/div> <\/div> <\/div> <\/div> <\/div><\/div>","protected":false},"excerpt":{"rendered":"

Sur le sujet suivant : Bentonite et diatomite modifi\u00e9es versus polym\u00e8res \u00e0 empreintes ioniques : vers de nouveaux mat\u00e9riaux pour l’extraction du nickel et de l’argent d’effluents contamin\u00e9sTh\u00e8se en co-tutelle\u00a0 […]<\/p>\n","protected":false},"author":1,"featured_media":4489,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6625","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/6625","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/comments?post=6625"}],"version-history":[{"count":0,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/6625\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media\/4489"}],"wp:attachment":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media?parent=6625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/categories?post=6625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/tags?post=6625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}