{"id":247,"date":"2021-09-30T17:23:22","date_gmt":"2021-09-30T15:23:22","guid":{"rendered":"https:\/\/acepartnerz.kinsta.cloud\/ramr2d\/?post_type=boursier&#038;p=247"},"modified":"2024-08-07T17:20:41","modified_gmt":"2024-08-07T15:20:41","slug":"oulare-pierre-tamba","status":"publish","type":"boursier","link":"https:\/\/ace-partner.org\/ramr2d\/boursier\/oulare-pierre-tamba\/","title":{"rendered":"OULARE Pierre Tamba"},"content":{"rendered":"\n<p><strong>Intitul\u00e9 :<\/strong> <strong>\u00c9valuation du potentiel des r\u00e9sidus de production d&rsquo;alumine de l&rsquo;usine Rusal Friguia en R\u00e9publique de Guin\u00e9e pour l&rsquo;extraction de terres rares<\/strong><\/p>\n\n\n\n<p><strong>R\u00e9sum\u00e9 du projet scientifique<\/strong> :<\/p>\n\n\n\n<p>La production de m\u00e9taux critiques \u00e0 partir de ressources secondaires est essentielle pour soutenir le d\u00e9veloppement des technologies qui en d\u00e9pendent, notamment celles li\u00e9es \u00e0 la transition \u00e9nerg\u00e9tique.<br>Dans le contexte de l&rsquo;\u00e9conomie circulaire, les d\u00e9chets miniers et industriels repr\u00e9sentent des ressources secondaires de terres rares largement sous-exploit\u00e9es.<br>De grandes quantit\u00e9s de boues rouges sont g\u00e9n\u00e9r\u00e9es depuis 1960 \u00e0 l&rsquo;usine Rusal friguia en R\u00e9publique de Guin\u00e9e, sans valorisation significative.<br>Ces boues sont stock\u00e9es et pr\u00e9sentent un risque environnemental important en raison de leur alcalinit\u00e9 (pH\u02c312) et de la pr\u00e9sence de m\u00e9taux lourds.<\/p>\n\n\n\n<p><strong>Synth\u00e8se des r\u00e9sultats obtenus<\/strong> <strong>: <\/strong><\/p>\n\n\n\n<p>Afin d&rsquo;augmenter la visibilit\u00e9 de ce travail, nous avons \u00e9tendu l&rsquo;\u00e9tude initiale aux boues karstiques produites dans la r\u00e9gion de Marseille au cours du si\u00e8cle dernier.<br>Dans le but de valoriser ces r\u00e9sidus, des \u00e9tudes de caract\u00e9risation et de dissolution s\u00e9lective des terres rares dans des conditions de pH doux ont \u00e9t\u00e9 r\u00e9alis\u00e9es.<br>Des diff\u00e9rences dans la sp\u00e9ciation des terres rares lourdes ont \u00e9t\u00e9 observ\u00e9es en fonction de l&rsquo;origine g\u00e9ologique des boues. Les exp\u00e9riences de lixiviation et d&rsquo;optimisation ont \u00e9t\u00e9 r\u00e9alis\u00e9es selon un plan de Box-Behnken. Nous avons montr\u00e9 que l&rsquo;origine de la bauxite influence la sp\u00e9ciation et la dissolution des terres rares dans le r\u00e9sidu de bauxite.<\/p>\n\n\n\n<div style=\"height:0px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"PIERRE - Boursier ACE Partner\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/IlVRqO_9xo8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Intitul\u00e9 : \u00c9valuation du potentiel des r\u00e9sidus de production d&rsquo;alumine de l&rsquo;usine Rusal Friguia en R\u00e9publique de Guin\u00e9e pour l&rsquo;extraction de terres rares R\u00e9sum\u00e9 du projet scientifique : La production de m\u00e9taux critiques \u00e0 partir de ressources secondaires est essentielle pour soutenir le d\u00e9veloppement des technologies qui en d\u00e9pendent, notamment celles li\u00e9es \u00e0 la transition [&hellip;]<\/p>\n","protected":false},"featured_media":253,"menu_order":0,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false},"class_list":["post-247","boursier","type-boursier","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - 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