![\"\"](\"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-content\/uploads\/usu1369\/2022\/12\/20221202_103637.jpg\")
<\/a><\/p>\nAnalitzem diferents aspectes fisicoqu\u00edmics de les fonts del balneari per donar resposta a la pregunta “quina \u00e9s la millor font per beure’n di\u00e0riament d’aquest balneari?”. \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. Trobem fonts que tenen Ph \u00e0cid i poc residu sec, com ara la Font del Ferro, i d\u2019altres que s\u00f3n molt riques en sals minerals, tenen molt sulfur d\u2019hidrogen 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, ja que \u00e9s de mineralitzaci\u00f3 d\u00e8bil\u2026<\/p>\n
Passejant per les fonts de Caldes de Bo\u00ed ens sorpr\u00e8n l\u2019olor a ous podrits amb freq\u00fc\u00e8ncia. No dep\u00e8n de la temperatura, ja que aquesta olor es despr\u00e8n tant d\u2019algunes fonts fredes com calentes. El que si que \u00e9s com\u00fa en aquestes fonts pudentes \u00e9s la pres\u00e8ncia d\u2019uns filaments blancs que recobreixen la fullaraca en contacte amb l\u2019aigua i la canonada de sortida d\u2019aigua de la font.\u00a0\u00a0\u00a0<\/a>Si ho observem sota el microscopi, veiem que s\u00f3n col\u00f2nies de bacteris!\u00a0\ud83d\udd2c L\u2019olor a ous podrits est\u00e0 provocada pel sulfur d\u2019hidrogen que duu l\u2019aigua (H2S). \u00c9s un gas m\u00e9s pesat que l\u2019aire, incolor i t\u00f2xic. Paradoxalment, aquest compost \u00e9s clau pel desenvolupament d\u2019aquests bacteris:\u00a0metab\u00f2licament, oxiden el H2S a S incorporant-lo al seu citoplasma segons la f\u00f3rmula I, un cop m\u00e9s, la vida s\u2019obre 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? \u00c9s el balneari amb m\u00e9s varietat […]<\/p>\n","protected":false},"author":51,"featured_media":9583,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","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":"default","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 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\n<\/a><\/a>
\nEs tracta de col\u00f2nies de bacteris sulfooxidants pertanyents als g\u00e8neres Beggiatoa. A difer\u00e8ncia d\u2019altres bacteris, les seves c\u00e8l\u00b7lules s\u2019uneixen una rere l\u2019altra 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
\n2 H2S + O2 \u2014- 2S + 2H2O
\nS\u00f3n bacteris quimiolitoaut\u00f2trofs que mitjan\u00e7ant l\u2019oxidaci\u00f3 del sulfur d\u2019hidrogen obtenen energia, i fan servir el di\u00f2xid de carboni com a font de carboni per a la bios\u00edntesi.<\/p>\n
![\u00a0\u00a0<\/a>Si ho observem sota el microscopi, veiem que s\u00f3n col\u00f2nies de bacteris!\u00a0\ud83d\udd2c\n](\"https:\/\/serveiseducatius.xtec.cat\/cda-valldeboi\/wp-content\/uploads\/usu1369\/2022\/12\/20221202_104153.jpg\"){kind=link}