{"id":14146,"date":"2010-04-07T14:04:54","date_gmt":"2010-04-07T12:04:54","guid":{"rendered":"http:\/\/staging.sillon38.com\/?p=14146"},"modified":"2010-04-07T14:04:54","modified_gmt":"2010-04-07T12:04:54","slug":"pcb-de-nouveaux-cours-deau-iserois-contamines","status":"publish","type":"post","link":"https:\/\/www.sillon38.com\/blog\/2010\/04\/07\/pcb-de-nouveaux-cours-deau-iserois-contamines\/","title":{"rendered":"PCB: de nouveaux cours d’eau is\u00e8rois contamin\u00e9s"},"content":{"rendered":"

Les PCB, ou polychlorobiph\u00e9nyles, sont des d\u00e9riv\u00e9s chimiques chlor\u00e9s plus connus en France sous le nom de pyral\u00e8nes. Entre 1930 et le d\u00e9but des ann\u00e9es 80, les PCB ont \u00e9t\u00e9 produits pour diverses applications dans le domaine des transformateurs \u00e9lectriques et des appareils hydrauliques. Leurs propri\u00e9t\u00e9s remarquables en mati\u00e8re d\u2019isolation \u00e9lectrique, de stabilit\u00e9 thermique, de lubrification et de r\u00e9sistance au feu ont \u00e9t\u00e9 mises \u00e0 profit dans l\u2019industrie.<\/p>\n

Ces substances ont \u00e9t\u00e9 frapp\u00e9es d\u2019interdiction de fabrication en 1985 lorsqu\u2019il fut clairement \u00e9tabli qu\u2019elles repr\u00e9sentaient un danger pour la sant\u00e9 de\u00a0 l\u2019homme.<\/p>\n

Les\u00a0 effets chroniques, li\u00e9s \u00e0 une exposition sur le moyen et le long terme, ont \u00e9t\u00e9 mis en \u00e9vidence chez l\u2019animal (notamment toxicit\u00e9 pour la reproduction, pour le syst\u00e8me immunitaire, effet canc\u00e9rog\u00e8ne) et ont justifi\u00e9, pour l\u2019homme, leur classement en tant que substances probablement canc\u00e9rog\u00e8nes.<\/p>\n

\"p\u00eache
L'Is\u00e8re: l'interdiction de consommer du poisson ne s'applique qu'en aval de sa confluence avec le Drac<\/figcaption><\/figure>\n

Ces substances sont peu biod\u00e9gradables et persistent longtemps dans l\u2019environnement. Elles s\u2019accumulent dans les organismes vivants, le long de la cha\u00eene alimentaire, notamment les poissons.<\/p>\n

Peu solubles dans l\u2019eau, les PCB ne d\u00e9gradent pas la qualit\u00e9 de l\u2019eau en elle-m\u00eame. Par contre, ils se sont fix\u00e9s dans le temps sur les mati\u00e8res en suspension et les s\u00e9diments dans les cours d\u2019eau concern\u00e9s par ce type de pollution.<\/p>\n

Si une exposition de courte dur\u00e9e aux PCB n\u2019a pas de cons\u00e9quence sanitaire, la consommation de poissons contamin\u00e9s, si elle est fr\u00e9quente, peut avoir une incidence sur la sant\u00e9 du consommateur.<\/p>\n

Dans le cadre du plan national d\u2019actions sur les polychlorobiph\u00e9nyles (PCB) diff\u00e9rents programmes d\u2019analyses ont \u00e9t\u00e9 conduits depuis 2008 pour caract\u00e9riser l\u2019importance de la contamination par les PCB dans les milieux aquatiques et les produits de la p\u00eache.<\/p>\n

En ce qui concerne le d\u00e9partement de l\u2019Is\u00e8re, les analyses effectu\u00e9es en 2008 ont conduit \u00e0 l\u2019interdiction de consommation de poissons sur les cours d\u2019eau suivants :
\n– Is\u00e8re en aval de la confluence avec le Drac
\n– Romanche en aval du seuil Tardy \u00e0 Vizille
\n– Drac en aval de la confluence avec la Romanche<\/p>\n

Les r\u00e9sultats de la campagne 2009 conduisent la pr\u00e9fecture ce jour \u00e0 d\u2019une part confirmer les interdictions prononc\u00e9es en 2009, et d\u2019autre part \u00e0 \u00e9tendre ces interdictions de consommation de poissons sur :
\n– Le Coisetan : cours d\u2019eau situ\u00e9 en Savoie et Is\u00e8re (Pontcharra)
\n– La Fure en aval de sa confluence avec le R\u00e9aumont-sur-Ruves
\n– Le Canal Fure-Morge
\n– La Bourbre en aval de sa confluence avec le canal de Moutier situ\u00e9 sur St-Clair-de-la-Tour
\n– Le lac de Notre-Dame-de-Commiers<\/p><\/blockquote>\n

L\u2019interdiction porte sur toutes les esp\u00e8ces de poissons pour le Coisetan, la Fure et le canal de la Fure-Morge, et uniquement sur certaines esp\u00e8ces dites fortement bio-accumulatrices, dont la liste est pr\u00e9cis\u00e9e dans les arr\u00eat\u00e9s, pour la Bourbre et le lac de Notre-Dame-de-Commiers.<\/p>\n

Dans la continuit\u00e9 du plan national des investigations suppl\u00e9mentaires seront demand\u00e9es pour am\u00e9liorer la connaissance des niveaux de contamination sur les cours d\u2019eau de l\u2019Is\u00e8re.<\/p>\n","protected":false},"excerpt":{"rendered":"

La pr\u00e9fecture \u00e9tend les interdictions de consommer du poisson<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,57,60],"tags":[4215,4220,4470],"class_list":["post-14146","post","type-post","status-publish","format-standard","hentry","category-a-la-une","category-peche","category-pollution","tag-pcb","tag-peche","tag-prefecture-de-lisere"],"yoast_head":"\nPCB: de nouveaux cours d'eau is\u00e8rois contamin\u00e9s -<\/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.sillon38.com\/blog\/2010\/04\/07\/pcb-de-nouveaux-cours-deau-iserois-contamines\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PCB: de nouveaux cours d'eau 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