{"id":9851,"date":"2022-12-12T16:54:36","date_gmt":"2022-12-12T15:54:36","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/?p=9851"},"modified":"2026-01-16T12:53:44","modified_gmt":"2026-01-16T11:53:44","slug":"quimica-biologia-i-termalisme-a-caldes-de-boi","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/general\/quimica-biologia-i-termalisme-a-caldes-de-boi\/","title":{"rendered":"Qu\u00edmica, biologia i termalisme a Caldes de Bo\u00ed"},"content":{"rendered":"\n

Sabies que el Balneari de Caldes de Bo\u00ed \u00e9s al Llibre Guiness dels Records? \u00e9s el balneari amb m\u00e9s varietat d’aig\u00fces del m\u00f3n: t\u00e9 37 fonts d\u2019aig\u00fces mineromedicinals de diverses composicions i temperatures, que s\u00f3n utilitzades tan per beure com per finalitats terap\u00e8utiques.<\/p>\n\n\n\n

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Divendres passat hi vam anar amb l’alumnat de 1er de batxillerat cient\u00edfic de l’INS Montbui. Vam analitzar diferents fonts del balneari per deduir quina \u00e9s la millor font per beure. \u00c9s impressionant veure com malgrat que les surg\u00e8ncies s\u00f3n ben a la vora, cada font t\u00e9 la seva composici\u00f3 mineral\u00f2gica i Ph particulars. Vam veure fonts que tenen Ph \u00e0cid i poc residu sec, com ara la Font del Ferro, i d’altres que s\u00f3n molt riques en sals minerals, tenen molt sulfur d’hidrogen i fan olor a ous podrits, i amb pH marcadament b\u00e0sic, com ara la font de Sta. Ll\u00facia. Sens dubte, la font del bou \u00e9s la m\u00e9s equilibrada si en volem beure cada dia. Per\u00f2 la font del boix pot ser la m\u00e9s indicada si tens pedres al rony\u00f3… Aquest rac\u00f3 g\u00e8lid de la Vall de Bo\u00ed \u00e9s la nostra millor aula per aprendre sobre geologia, fisicoqu\u00edmica de l’aigua i h\u00e0bits saludables.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

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Passejant per les fonts de Caldes de Bo\u00ed ens sorpr\u00e8n l’olor a ous podrits amb freq\u00fc\u00e8ncia. No dep\u00e8n de la temperatura, ja que aquesta olor es despr\u00e8n tant d’algunes fonts fredes com calentes. El que si que \u00e9s com\u00fa en aquestes fonts pudentes \u00e9s la pres\u00e8ncia d’uns filaments blancs que recobreixen la fullaraca en contacte amb l’aigua i la canonada de sortida d’aigua de la font. \"\"  <\/a><\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Si ho observem sota el microscopi, veiem que s\u00f3n col\u00f2nies de bacteris! \ud83d\udd2c
\"\"<\/a>
Es tracta de col\u00f2nies de bacteris sulfooxidants pertanyents als g\u00e8neres Beggiatoa. A difer\u00e8ncia d’altres bacteris, les seves c\u00e8l\u00b7lules s’uneixen una rere l’altra fins a formar llargs filaments lliscants que es mouen sobre la superf\u00edcie dels fons poc profunds, donant-los aquesta aparen\u00e7a de floc de p\u00e8ls blancs.<\/p>\n\n\n\n

L’olor a ous podrits est\u00e0 provocada pel sulfur d’hidrogen que duu l’aigua (H2S). \u00c9s un gas m\u00e9s pesat que l’aire, incolor i t\u00f2xic. Paradoxalment, aquest compost \u00e9s clau pel desenvolupament d’aquests bacteris:\u00a0metab\u00f2licament, oxiden el H2S a S incorporant-lo al seu citoplasma segons la f\u00f3rmula
<\/p>\n\n\n\n

2 H2<\/sub>S + O2<\/sub> —- 2S + 2H2<\/sub>O<\/strong>
<\/p>\n\n\n\n

S\u00f3n bacteris quimiolitoaut\u00f2trofs que mitjan\u00e7ant l’oxidaci\u00f3 del sulfur d’hidrogen obtenen energia, i fan servir el di\u00f2xid de carboni com a font de carboni per a la bios\u00edntesi.<\/p>\n\n\n\n

CO <\/span><\/span>2<\/span><\/span><\/sub>  + O <\/span><\/span>2<\/span><\/span><\/sub>  + 4H <\/span><\/span>2<\/span><\/span><\/sub> S \u2192 CH <\/span><\/span>2<\/span><\/span><\/sub> O + 4S + 3H <\/span><\/span>2<\/span><\/span><\/sub> O<\/span><\/span><\/b><\/p>\n\n\n\n

\n

Beggiatoa sp. \u00e9s un\u00a0 microorganisme quimiolitoaut\u00f2trof: \u00a0\u00e9s\u00a0 quimi\u00f2trof \u00a0perqu\u00e8 la seva font d’energia prov\u00e9 de reaccions qu\u00edmiques en lloc de la llum; \u00e9s\u00a0 “autotrof” perqu\u00e8 sintetitza compostos org\u00e0nics usant com a font de carboni el\u00a0 CO2 ; i tamb\u00e9 \u00e9s\u00a0 lit\u00f2trof \u00a0perqu\u00e8 la seva font reductora o donadora d’hidrogen i electrons \u00e9s inorg\u00e0nica (H2S).<\/p>\n<\/blockquote>\n\n\n\n

I, un cop m\u00e9s , la vida s’obre pas en els medis m\u00e9s inh\u00f2spits i insospitats \ud83d\ude0d<\/p>\n","protected":false},"excerpt":{"rendered":"

Sabies que el Balneari de Caldes de Bo\u00ed \u00e9s al Llibre Guiness dels Records? \u00e9s el balneari amb m\u00e9s varietat d’aig\u00fces […]<\/p>\n","protected":false},"author":1,"featured_media":9854,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[262,342,1,29],"tags":[332,331],"class_list":["post-9851","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-activitats","category-aprendreambelscampsientorns","category-general","category-portada","tag-aprenemambelscampsientorns","tag-aprenemambelscdaieda"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/posts\/9851","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/comments?post=9851"}],"version-history":[{"count":6,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/posts\/9851\/revisions"}],"predecessor-version":[{"id":10447,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/posts\/9851\/revisions\/10447"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/media\/9854"}],"wp:attachment":[{"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/media?parent=9851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/categories?post=9851"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-json\/wp\/v2\/tags?post=9851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}