{"id":26790,"date":"2026-11-09T15:01:34","date_gmt":"2026-11-09T15:01:34","guid":{"rendered":"https:\/\/sgciafrica.org\/des-chercheurs-ivoiriens-elaborent-des-solutions-face-aux-degats-de-lorpaillage-illegal\/"},"modified":"2026-11-09T15:02:14","modified_gmt":"2026-11-09T15:02:14","slug":"des-chercheurs-ivoiriens-elaborent-des-solutions-face-aux-degats-de-lorpaillage-illegal","status":"publish","type":"post","link":"https:\/\/sgciafrica.org\/fr\/des-chercheurs-ivoiriens-elaborent-des-solutions-face-aux-degats-de-lorpaillage-illegal\/","title":{"rendered":"Des chercheurs ivoiriens \u00e9laborent des solutions face aux d\u00e9g\u00e2ts de l\u2019orpaillage ill\u00e9gal"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Des technologies d\u00e9velopp\u00e9es localement pour d\u00e9tecter les m\u00e9taux lourds dans l\u2019eau et restaurer des terres agricoles contamin\u00e9es pourraient aider la C\u00f4te d\u2019Ivoire \u00e0 faire face aux cons\u00e9quences environnementales et sanitaires de l\u2019orpaillage ill\u00e9gal.<\/p>\n\n<p class=\"wp-block-paragraph\">L\u2019orpaillage ill\u00e9gal a touch\u00e9 29 des 31 r\u00e9gions de C\u00f4te d\u2019Ivoire, mena\u00e7ant les ressources en eau, les terres agricoles et la sant\u00e9 publique, tout en co\u00fbtant au pays des milliards de francs CFA en recettes perdues.<\/p>\n\n<p class=\"wp-block-paragraph\">Bernard Ossey Yapo, directeur du Centre ivoirien antipollution (CIAPOL), a mis en avant les cons\u00e9quences environnementales et sanitaires d\u2019activit\u00e9s mini\u00e8res non contr\u00f4l\u00e9es.<\/p>\n\n<p class=\"wp-block-paragraph\">\u00ab Avec des pertes fiscales annuelles estim\u00e9es \u00e0 744 milliards de FCFA et de l\u2019or extrait en dehors des circuits officiels \u00e9valu\u00e9 \u00e0 4\u202f600 milliards de FCFA, l\u2019ampleur du probl\u00e8me suscite des appels \u00e0 des solutions qui aillent au-del\u00e0 de la fermeture des sites d\u2019exploitation ill\u00e9gale et des poursuites contre les contrevenants \u00bb, a-t-il d\u00e9clar\u00e9.<\/p>\n\n<p class=\"wp-block-paragraph\">Les op\u00e9rations mini\u00e8res, en particulier le dragage et le lavage, ont accru les niveaux de s\u00e9diments dans les rivi\u00e8res, avec des mati\u00e8res en suspension atteignant 12\u202f030 milligrammes par litre dans le fleuve N\u2019Zi. Des m\u00e9taux lourds, dont le plomb, le chrome et l\u2019arsenic, ont \u00e9galement \u00e9t\u00e9 d\u00e9tect\u00e9s \u00e0 des niveaux pr\u00e9occupants dans certains sites, notamment \u00e0 Daoukro.<\/p>\n\n<p class=\"wp-block-paragraph\">L\u2019usage ill\u00e9gal du cyanure et la d\u00e9pendance persistante au mercure dans l\u2019extraction de l\u2019or aggravent encore la situation. Le mercure est particuli\u00e8rement dangereux, car il peut s\u2019accumuler dans les organismes vivants et se d\u00e9placer le long de la cha\u00eene alimentaire, exposant les communaut\u00e9s qui d\u00e9pendent de poissons et d\u2019eau contamin\u00e9s.<\/p>\n\n<p class=\"wp-block-paragraph\">Ossey Yapo a pr\u00e9cis\u00e9 qu\u2019une exposition prolong\u00e9e \u00e0 ces polluants peut provoquer des intoxications chroniques, de graves affections cutan\u00e9es et des atteintes neurologiques, affectant particuli\u00e8rement le d\u00e9veloppement des enfants vivant \u00e0 proximit\u00e9 de r\u00e9seaux fluviaux contamin\u00e9s.<\/p>\n\n<p class=\"wp-block-paragraph\">Des chercheurs soutenus par le <a href=\"https:\/\/fonsti.org\/petit-dejeuner-de-l-innovation-orpaillage-clandestin-et-illegal-en-cote-d-ivoire\/\">Fonds pour la science, la technologie et l\u2019innovation (FONSTI)<\/a> mettent au point des technologies pour d\u00e9tecter et \u00e9liminer les substances toxiques de l\u2019eau et r\u00e9habiliter les terres d\u00e9grad\u00e9es par l\u2019exploitation mini\u00e8re.<\/p>\n\n<p class=\"wp-block-paragraph\">Ces innovations ont \u00e9t\u00e9 pr\u00e9sent\u00e9es lors d\u2019un Petit-d\u00e9jeuner de l\u2019innovation organis\u00e9 par le FONSTI le 8 octobre 2026 \u00e0 l\u2019h\u00f4tel Azala\u00ef, \u00e0 Abidjan.<\/p>\n\n<p class=\"wp-block-paragraph\">La rencontre, plac\u00e9e sous le th\u00e8me <em>Orpaillage ill\u00e9gal et clandestin en C\u00f4te d\u2019Ivoire : de l\u2019urgence environnementale \u00e0 des solutions innovantes et durables<\/em>, a r\u00e9uni des d\u00e9cideurs, des chercheurs, des autorit\u00e9s traditionnelles, des repr\u00e9sentants du secteur minier et des partenaires de d\u00e9veloppement afin d\u2019explorer des r\u00e9ponses concr\u00e8tes \u00e0 la crise.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Des technologies locales ciblent la contamination de l\u2019eau<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">L\u2019une des initiatives soutenues par le FONSTI, men\u00e9e par N\u2019Dri Seiny Roger et son \u00e9quipe de recherche, vise \u00e0 d\u00e9velopper des technologies abordables pour surveiller et traiter l\u2019eau contamin\u00e9e.<\/p>\n\n<p class=\"wp-block-paragraph\">Les chercheurs ont mis au point des capteurs \u00e9lectrochimiques utilisant des \u00e9lectrodes modifi\u00e9es avec de la poudre de graines de <em>Moringa oleifera<\/em> ou de l\u2019argile. Ces capteurs peuvent d\u00e9tecter des polluants tels que le mercure, le plomb et le cyanure, offrant une voie potentiellement accessible pour suivre la qualit\u00e9 de l\u2019eau dans les communaut\u00e9s touch\u00e9es par l\u2019exploitation mini\u00e8re.<\/p>\n\n<p class=\"wp-block-paragraph\">L\u2019\u00e9quipe a \u00e9galement d\u00e9velopp\u00e9 un syst\u00e8me de filtration \u00e9cologique combinant du gravier, du charbon actif et de la biomasse de moringa. Selon les r\u00e9sultats du projet pr\u00e9sent\u00e9s lors de la rencontre, le syst\u00e8me peut \u00e9liminer entre 80 et 99 % des m\u00e9taux lourds de l\u2019eau contamin\u00e9e avant son rejet ou sa r\u00e9utilisation.<\/p>\n\n<p class=\"wp-block-paragraph\">Le recours \u00e0 des mat\u00e9riaux disponibles localement pourrait faire de cette technologie une option rentable pour les communaut\u00e9s et les institutions qui cherchent \u00e0 surveiller et \u00e0 g\u00e9rer la pollution de l\u2019eau.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Restaurer les terres agricoles d\u00e9grad\u00e9es par l\u2019exploitation mini\u00e8re<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Un deuxi\u00e8me projet soutenu par le FONSTI s\u2019attaque au d\u00e9fi de la restauration des terres agricoles d\u00e9grad\u00e9es par l\u2019exploitation mini\u00e8re.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"450\" height=\"450\" src=\"https:\/\/sgciafrica.org\/wp-content\/uploads\/2026\/11\/Secretary-General-of-FONSTI_BODY.jpg\" alt=\"\" class=\"wp-image-26786\" srcset=\"https:\/\/sgciafrica.org\/wp-content\/uploads\/2026\/11\/Secretary-General-of-FONSTI_BODY.jpg 450w, https:\/\/sgciafrica.org\/wp-content\/uploads\/2026\/11\/Secretary-General-of-FONSTI_BODY-300x300.jpg 300w, https:\/\/sgciafrica.org\/wp-content\/uploads\/2026\/11\/Secretary-General-of-FONSTI_BODY-150x150.jpg 150w, https:\/\/sgciafrica.org\/wp-content\/uploads\/2026\/11\/Secretary-General-of-FONSTI_BODY-90x90.jpg 90w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><figcaption class=\"wp-element-caption\"><em>Secr\u00e9taire g\u00e9n\u00e9ral du FONSTI, Dr Yaya Sangar\u00e9<\/em><\/figcaption><\/figure>\n<\/div>\n<p class=\"wp-block-paragraph\">Dirig\u00e9 par Kpangui Kouassi Bruno et une \u00e9quipe de l\u2019<a href=\"https:\/\/ujlog.edu.ci\/\">Universit\u00e9 Jean Lorougnon Gu\u00e9d\u00e9 (UJLOG)<\/a>, le projet de r\u00e9habilitation d\u2019anciens sites d\u2019orpaillage \u00e0 des fins agricoles, <a href=\"https:\/\/www.ujlog-fcil.ci\/2025\/11\/10\/rehabilitation-danciens-sites-dorpaillage-a-des-fins-agricoles-dans-le-district-du-sassandra-marahoue\/?utm_source=chatgpt.com\">RASORA<\/a>, intervient dans le district du Sassandra-Marahou\u00e9, notamment \u00e0 Kouassi-P\u00e9rita, afin de r\u00e9habiliter des sols contamin\u00e9s et de les rendre aptes \u00e0 la production agricole.<\/p>\n\n<p class=\"wp-block-paragraph\">L\u2019approche combine du biochar et du compost avec des plantes et des micro-organismes soigneusement s\u00e9lectionn\u00e9s, capables de contribuer \u00e0 la d\u00e9contamination de sols d\u00e9grad\u00e9s.<\/p>\n\n<p class=\"wp-block-paragraph\">L\u2019\u00e9quipe de recherche utilise des isolats microbiens, notamment des esp\u00e8ces de <em>Bacillus<\/em> et de <em>Pseudomonas<\/em>, dans le cadre de sa strat\u00e9gie de r\u00e9habilitation des sols.<\/p>\n\n<p class=\"wp-block-paragraph\">Le projet vise \u00e0 restaurer la qualit\u00e9 des sols et \u00e0 soutenir la production de cultures vivri\u00e8res et de l\u00e9gumes, notamment des bananes, du manioc, des tomates et des piments, sur des terres auparavant d\u00e9grad\u00e9es. Cela pourrait aider les communaut\u00e9s touch\u00e9es \u00e0 retrouver des moyens de subsistance agricoles, tout en r\u00e9duisant les risques sanitaires potentiels li\u00e9s aux sols contamin\u00e9s.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Passer de la r\u00e9pression \u00e0 la r\u00e9habilitation<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Ossey Yapo a d\u00e9clar\u00e9 que, bien que le gouvernement ivoirien ait intensifi\u00e9 la lutte contre l\u2019orpaillage ill\u00e9gal \u2014 notamment en d\u00e9mantelant plus de 8\u202f500 sites entre 2021 et le premier semestre 2026 \u2014 les arrestations et le durcissement des sanctions p\u00e9nales n\u2019ont pas suffi \u00e0 r\u00e9parer les dommages environnementaux.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"150\" src=\"https:\/\/sgciafrica.org\/wp-content\/uploads\/2026\/11\/ROSARA-Project_2_BODY.jpg\" alt=\"\" class=\"wp-image-26787\"\/><figcaption class=\"wp-element-caption\"><em>Projet ROSARA<\/em><\/figcaption><\/figure>\n<\/div>\n<p class=\"wp-block-paragraph\">Les \u00e9changes lors du Petit-d\u00e9jeuner de l\u2019innovation ont mis en \u00e9vidence la n\u00e9cessit\u00e9 de compl\u00e9ter l\u2019action r\u00e9pressive par un suivi scientifique, la restauration des \u00e9cosyst\u00e8mes et des possibilit\u00e9s de moyens de subsistance alternatifs pour les communaut\u00e9s touch\u00e9es.<\/p>\n\n<p class=\"wp-block-paragraph\">Le secr\u00e9taire g\u00e9n\u00e9ral du <a href=\"https:\/\/fonsti.org\/\">FONSTI<\/a>, Yaya Sangar\u00e9, a d\u00e9clar\u00e9 : \u00ab Le r\u00f4le de l\u2019institution \u00e9tait d\u2019assurer la transposition des connaissances scientifiques en solutions pratiques r\u00e9pondant aux d\u00e9fis du d\u00e9veloppement national \u00bb.<\/p>\n\n<p class=\"wp-block-paragraph\">Un panel mod\u00e9r\u00e9 par Alain Toh a r\u00e9uni des chercheurs, des experts environnementaux, des repr\u00e9sentants du secteur minier et des autorit\u00e9s locales afin d\u2019examiner comment d\u00e9ployer plus largement les innovations scientifiques.<\/p>\n\n<p class=\"wp-block-paragraph\">L\u2019implication des autorit\u00e9s traditionnelles, dont le chef de Hir\u00e9, Mo\u00efs\u00e9 Any Gbetto, a illustr\u00e9 l\u2019importance de la participation communautaire pour lutter contre l\u2019exploitation mini\u00e8re ill\u00e9gale et restaurer les zones touch\u00e9es.<\/p>\n\n<p class=\"wp-block-paragraph\">Les participants ont soulign\u00e9 la n\u00e9cessit\u00e9 d\u2019une approche nationale coordonn\u00e9e, incluant des programmes de r\u00e9habilitation \u00e0 grande \u00e9chelle, un suivi continu des principaux bassins fluviaux tels que le Bandama, la Como\u00e9, la Sassandra et le Cavally, ainsi qu\u2019un appui aux communaut\u00e9s pour d\u00e9velopper des alternatives \u00e9conomiques durables \u00e0 l\u2019orpaillage ill\u00e9gal.<\/p>\n\n<p class=\"wp-block-paragraph\">Ces initiatives mettent \u00e9galement en lumi\u00e8re le r\u00f4le du FONSTI dans le renforcement de l\u2019\u00e9cosyst\u00e8me de recherche et d\u2019innovation en C\u00f4te d\u2019Ivoire. En tant que membre de l\u2019<a href=\"https:\/\/sgciafrica.org\/fr\/council\/fonds-pour-la-science-la-technologie-et-linnovation-cote-divoire\/\">Initiative des conseils d\u2019octroi de subventions scientifiques (IOSRS),<\/a> le FONSTI collabore avec d\u2019autres conseils africains d\u2019octroi de subventions scientifiques afin de renforcer le financement de la recherche, d\u2019\u00e9changer des connaissances et de d\u00e9velopper les capacit\u00e9s institutionnelles. Gr\u00e2ce \u00e0 ces partenariats, notamment avec des conseils au Mozambique, en Ouganda et en Afrique du Sud, l\u2019initiative soutient des institutions de financement de la science plus solides et l\u2019utilisation de donn\u00e9es probantes issues de la recherche pour \u00e9clairer les politiques de d\u00e9veloppement \u00e9conomique et social.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"150\" src=\"https:\/\/sgciafrica.org\/wp-content\/uploads\/2026\/11\/ROSARA-Project_BODY.jpg\" alt=\"\" class=\"wp-image-26788\"\/><figcaption class=\"wp-element-caption\"><em>Projet ROSARA<\/em><\/figcaption><\/figure>\n<\/div>\n<p class=\"wp-block-paragraph\">Les efforts du FONSTI pour f\u00e9d\u00e9rer chercheurs, d\u00e9cideurs et autres parties prenantes autour de solutions \u00e0 l\u2019orpaillage ill\u00e9gal montrent comment les conseils nationaux d\u2019octroi de subventions scientifiques peuvent contribuer \u00e0 transformer une recherche produite localement en r\u00e9ponses \u00e0 des d\u00e9fis de d\u00e9veloppement pressants.<\/p>\n\n<p class=\"wp-block-paragraph\">Pour le FONSTI, l\u2019enjeu consiste d\u00e9sormais \u00e0 faire passer des travaux prometteurs au-del\u00e0 du laboratoire, vers une application concr\u00e8te.<\/p>\n\n<p class=\"wp-block-paragraph\">Le d\u00e9ploiement \u00e0 grande \u00e9chelle de ces technologies exigera une collaboration entre chercheurs, institutions publiques, op\u00e9rateurs miniers, autorit\u00e9s locales et partenaires de d\u00e9veloppement, ainsi que des politiques favorisant le suivi environnemental et la restauration des terres.<\/p>\n\n<p class=\"wp-block-paragraph\">Ces projets montrent comment des connaissances scientifiques produites localement peuvent contribuer \u00e0 relever des d\u00e9fis environnementaux complexes. Toutefois, leur impact \u00e0 plus grande \u00e9chelle d\u00e9pendra d\u2019investissements durables, d\u2019un appui institutionnel et de la capacit\u00e9 \u00e0 traduire les r\u00e9sultats de la recherche en solutions auxquelles les communaut\u00e9s peuvent acc\u00e9der et qu\u2019elles peuvent utiliser.<\/p>\n\n<p class=\"wp-block-paragraph\"><em>D\u00e9couvrez<\/em> <a href=\"https:\/\/sgciafrica.org\/fr\/actualites\/\"><em>les t\u00e9moignages<\/em><\/a> <em>et dites-nous ce que vous en pensez. Nous serions ravis de vous lire !<\/em><\/p>\n\n<p class=\"wp-block-paragraph\"><em>Poursuivons la conversation<\/em> <em>sur nos r\u00e9seaux sociaux<\/em><\/p>\n\n<p class=\"wp-block-paragraph\"><em>Suivez-nous sur<\/em> <a href=\"https:\/\/www.linkedin.com\/company\/science-granting-councils-initiative\/\"><em>LinkedIn<\/em><\/a> <em>et<\/em> <a href=\"https:\/\/x.com\/SGCIAfrica\"><em>X<\/em><\/a><em><\/em><\/p>\n\n<p class=\"wp-block-paragraph\"><em>Publi\u00e9 le 9 novembre 2026<\/em><\/p>\n\n<p class=\"wp-block-paragraph\"><em>Par Jackie Opara-Fatoye<\/em><em><\/em><\/p>\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des technologies d\u00e9velopp\u00e9es localement pour d\u00e9tecter les m\u00e9taux lourds dans l\u2019eau et restaurer des terres agricoles contamin\u00e9es pourraient aider la C\u00f4te d\u2019Ivoire \u00e0 faire face aux cons\u00e9quences environnementales et sanitaires de l\u2019orpaillage ill\u00e9gal. L\u2019orpaillage ill\u00e9gal a touch\u00e9 29 des 31 r\u00e9gions de C\u00f4te d\u2019Ivoire, mena\u00e7ant les ressources en eau, les terres agricoles et la sant\u00e9&hellip;<\/p>\n","protected":false},"author":13,"featured_media":26791,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","wds_primary_category":0,"wds_primary_country":0,"wds_primary_objective":0,"wds_primary_sg_theme":0,"footnotes":""},"categories":[161],"tags":[],"country":[],"objective":[],"sg_theme":[],"class_list":["post-26790","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Des chercheurs ivoiriens \u00e9laborent des solutions face aux d\u00e9g\u00e2ts de l\u2019orpaillage ill\u00e9gal - IOSRS Afrique<\/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:\/\/sgciafrica.org\/fr\/des-chercheurs-ivoiriens-elaborent-des-solutions-face-aux-degats-de-lorpaillage-illegal\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Des chercheurs ivoiriens \u00e9laborent des solutions face aux d\u00e9g\u00e2ts de l\u2019orpaillage ill\u00e9gal\" \/>\n<meta property=\"og:description\" content=\"Des technologies d\u00e9velopp\u00e9es localement pour d\u00e9tecter les m\u00e9taux lourds dans l\u2019eau et restaurer des terres agricoles contamin\u00e9es pourraient aider la C\u00f4te d\u2019Ivoire \u00e0 faire face aux cons\u00e9quences environnementales et sanitaires de l\u2019orpaillage ill\u00e9gal. 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L\u2019orpaillage ill\u00e9gal a touch\u00e9 29 des 31 r\u00e9gions de C\u00f4te d\u2019Ivoire, mena\u00e7ant les ressources en eau, les terres agricoles et la sant\u00e9&hellip;","_links":{"self":[{"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/posts\/26790","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/comments?post=26790"}],"version-history":[{"count":0,"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/posts\/26790\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/media\/26791"}],"wp:attachment":[{"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/media?parent=26790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/categories?post=26790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/tags?post=26790"},{"taxonomy":"country","embeddable":true,"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/country?post=26790"},{"taxonomy":"objective","embeddable":true,"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/objective?post=26790"},{"taxonomy":"sg_theme","embeddable":true,"href":"https:\/\/sgciafrica.org\/fr\/wp-json\/wp\/v2\/sg_theme?post=26790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}