{"id":4136,"date":"2025-08-01T16:28:05","date_gmt":"2025-08-01T14:28:05","guid":{"rendered":"https:\/\/www.landerneau-ecologie.org\/?p=4136"},"modified":"2025-08-01T16:28:05","modified_gmt":"2025-08-01T14:28:05","slug":"histoire-de-la-chimie-des-algues-en-bretagne-de-la-soude-a-liode-jusquaux-alginates","status":"publish","type":"post","link":"https:\/\/www.landerneau-ecologie.org\/?p=4136","title":{"rendered":"Histoire de la chimie des algues en Bretagne. De la soude \u00e0 l&#8217;iode jusqu&#8217;aux alginates."},"content":{"rendered":"\n<p><\/p>\n\n\n\n<p>Il n&#8217;y a pas que les algues vertes en Bretagne.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img src=\"https:\/\/i0.wp.com\/image.over-blog.com\/w62usYStduFaptYwyalgLgYb1lE=\/filters:no_upscale()\/image%2F0561035%2F20250313%2Fob_e44d3e_01-goemonier-lilia.jpg?ssl=1\" alt=\"\" data-recalc-dims=\"1\" \/><\/figure>\n\n\n\n<p>Le Nord-Finist\u00e8re, en Bretagne, n&#8217;est pas particuli\u00e8rement r\u00e9put\u00e9 pour son industrie chimique. Pourtant, depuis le 17e si\u00e8cle, c&#8217;est \u00e0 dire depuis le d\u00e9but de la chimie, une activit\u00e9 chimique y est men\u00e9e, sans interruption, autour des algues.<\/p>\n\n\n\n<p>L&#8217;industrie de la &#8220;soude&#8221; (carbonate de sodium) se d\u00e9veloppe d&#8217;abord. On extrait ce produit des cendres de go\u00e9mons s\u00e9ch\u00e9s. Il est indispensable \u00e0 la fabrication du verre. Cette activit\u00e9 s&#8217;arr\u00eate \u00e0 la fin du 18e si\u00e8cle quand de nouveaux proc\u00e9d\u00e9s sont d\u00e9couverts.<\/p>\n\n\n\n<p>Elle reprend en 1829 apr\u00e8s que le chimiste Bernard Courtois ait d\u00e9couvert, en 1812, un nouveau et utile produit dans les cendres d&#8217;algues&nbsp;: l&#8217;iode. L&#8217;iode est utilis\u00e9e, en particulier, en photographie et en m\u00e9decine. Sa production en Bretagne s&#8217;arr\u00eate en 1952 \u00e0 cause de la concurrence de l&#8217;iode extrait des nitrates du Chili.<\/p>\n\n\n\n<p>Aujourd&#8217;hui le relais est pris par l&#8217;extraction des alginates contenus dans les grandes laminaires.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Voir la suite : <\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/histoires-de-sciences.over-blog.fr\/article-30505855.html\">h<strong>ttps:\/\/histoires-de-sciences.over-blog.fr\/article-30505855.html<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Il n&#8217;y a pas que les algues vertes en Bretagne. Le Nord-Finist\u00e8re, en Bretagne, n&#8217;est pas particuli\u00e8rement r\u00e9put\u00e9 pour son industrie chimique. Pourtant, depuis le 17e si\u00e8cle, c&#8217;est \u00e0 dire depuis le d\u00e9but de la chimie, une activit\u00e9 chimique y est men\u00e9e, sans interruption, autour des algues. L&#8217;industrie de la &#8220;soude&#8221; (carbonate de sodium) se [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[1],"tags":[],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pE6pS-14I","_links":{"self":[{"href":"https:\/\/www.landerneau-ecologie.org\/index.php?rest_route=\/wp\/v2\/posts\/4136"}],"collection":[{"href":"https:\/\/www.landerneau-ecologie.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.landerneau-ecologie.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.landerneau-ecologie.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.landerneau-ecologie.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4136"}],"version-history":[{"count":1,"href":"https:\/\/www.landerneau-ecologie.org\/index.php?rest_route=\/wp\/v2\/posts\/4136\/revisions"}],"predecessor-version":[{"id":4137,"href":"https:\/\/www.landerneau-ecologie.org\/index.php?rest_route=\/wp\/v2\/posts\/4136\/revisions\/4137"}],"wp:attachment":[{"href":"https:\/\/www.landerneau-ecologie.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4136"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.landerneau-ecologie.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4136"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.landerneau-ecologie.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}