{"id":4565,"date":"2017-05-23T22:57:38","date_gmt":"2017-05-23T20:57:38","guid":{"rendered":"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/?p=4565"},"modified":"2017-06-20T20:47:26","modified_gmt":"2017-06-20T18:47:26","slug":"dime-que-puedo-a-hacer-para-oxidarte-materia-organica","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/modul-b\/dime-que-puedo-a-hacer-para-oxidarte-materia-organica\/","title":{"rendered":"\u00bf Dime qu\u00e9 puedo hacer para oxidarte, materia org\u00e1nica?"},"content":{"rendered":"<p><a href=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2017\/05\/WhatsApp-Image-2017-05-23-at-18.17.04.jpeg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-4635 aligncenter\" src=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2017\/05\/WhatsApp-Image-2017-05-23-at-18.17.04-768x1024.jpeg\" alt=\"WhatsApp Image 2017-05-23 at 18.17.04\" width=\"390\" height=\"520\" srcset=\"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2017\/05\/WhatsApp-Image-2017-05-23-at-18.17.04-768x1024.jpeg 768w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2017\/05\/WhatsApp-Image-2017-05-23-at-18.17.04-225x300.jpeg 225w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2017\/05\/WhatsApp-Image-2017-05-23-at-18.17.04.jpeg 1200w\" sizes=\"auto, (max-width: 390px) 100vw, 390px\" \/><\/a><\/p>\n<p>Uno de los diversos componentes que contiene un agua residual es la <em><strong>materia org\u00e1nica<\/strong><\/em>.<\/p>\n<p>\u00c9stas deben ser degradas, ya que el vertido\u00a0al medio de aguas residuales en las que la materia org\u00e1nica no ha sido eliminada podr\u00eda provocar consecuencias desastrosas en el medio como la muerte del medio acu\u00e1tico en el que llegan estas aguas, porque la supervivencia de \u00a0muchos organismos que habitan esos medios podr\u00eda verse comprometida. Ahora bien, \u00bfcu\u00e1les son los procesos para eliminar esta materia org\u00e1nica? Una de las claves est\u00e1 en el ox\u00edgeno.<\/p>\n<p><!--more--><\/p>\n<p>El ox\u00edgeno es un oxidante (sustancia que es capaz de captar electrones de otra sustancia) que puede oxidar la materia org\u00e1nica. Como directamente no podemos medir la cantidad de ox\u00edgeno necesaria para degradar la materia org\u00e1nica lo que se hace es asociar su demanda te\u00f3rica a dos oxidantes: el i\u00f3n permanganato y dicromato.<\/p>\n<p>Dependiendo del tipo de contaminaci\u00f3n del agua se utilizar\u00e1 un i\u00f3n u otro. En este caso emplearemos el i\u00f3n permanganato que se emplea para aguas potables o destinadas a la potabilizaci\u00f3n.<\/p>\n<p><strong>Material<\/strong><\/p>\n<ul>\n<li>Pipetas aforadas de 100,25,10 y 20 mL<\/li>\n<li>matraz aforado de 200 mL<\/li>\n<li>2 matraces Erlenmeyer<\/li>\n<li>probetas<\/li>\n<li>vasos de precipitado<\/li>\n<li>placas calefactoras<\/li>\n<li>balanza granatari<\/li>\n<\/ul>\n<p><strong>Reactivos<\/strong><\/p>\n<ul>\n<li>Sal de Mohr<\/li>\n<li>KMnO4 ( que act\u00faa como indicador)<\/li>\n<li>H2SO4<\/li>\n<\/ul>\n<p><strong>Muestras<\/strong><\/p>\n<p>Agua destilada y del grifo<\/p>\n<p><strong>Procedimiento<\/strong><\/p>\n<p>Para hacer la determinaci\u00f3n se han de preparar tres soluciones de \u00e1cido sulf\u00farico, permanganato y de hierro II (que es la sal de Mohr). Cuando se haya acabado la preparaci\u00f3n de estas soluciones y se hayan lavado correctamente los matraces Erlenmeyer (para eliminar cualquier resto de materia org\u00e1nica que podr\u00eda influir en el resultado final) ponemos en dichos matraces 50 mL de agua destilada, 10 mL de soluci\u00f3n de permanganato y 5 mL de la soluci\u00f3n de sulf\u00farico. Esta mezcla se ha de hervir y dejar durante tres o cuatro minutos que contin\u00fae la ebullici\u00f3n. Cuando hayan pasado estos minutos tiramos la mezcla y volvemos a limpiarla con agua destilada. A continuaci\u00f3n, ponemos en el Erlenmeyer 100 mL de agua problema ( el agua de muestra) y le a\u00f1adimos 10 mL de sulf\u00farico diluido. Como hicimos anteriormente \u00e9ste lo hervimos y cuando empiece a hervir a\u00f1adimos 20 mL de permanganato. Pasados 10 minutos valoramos.<\/p>\n<p>En la bureta se pone el valorante que en este caso es la soluci\u00f3n de permanganato y en el matraz que hemos puesto a hervir antes, ponemos 10 mL de la soluci\u00f3n de sal de Mohr. En el momento que aparezca una coloraci\u00f3n de un ligero tono rosado paramos de valorar y apuntamos el volumen gastado, con lo que obtendremos la cantidad de ox\u00edgeno necesario para oxidar la materia org\u00e1nica.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2017\/05\/WhatsApp-Image-2017-05-23-at-18.16.54.jpeg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4634\" src=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2017\/05\/WhatsApp-Image-2017-05-23-at-18.16.54-768x1024.jpeg\" alt=\"WhatsApp Image 2017-05-23 at 18.16.54\" width=\"404\" height=\"538\" srcset=\"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2017\/05\/WhatsApp-Image-2017-05-23-at-18.16.54-768x1024.jpeg 768w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2017\/05\/WhatsApp-Image-2017-05-23-at-18.16.54-225x300.jpeg 225w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2017\/05\/WhatsApp-Image-2017-05-23-at-18.16.54.jpeg 1200w\" sizes=\"auto, (max-width: 404px) 100vw, 404px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uno de los diversos componentes que contiene un agua residual es la materia org\u00e1nica. \u00c9stas deben ser degradas, ya que [&hellip;]<\/p>\n","protected":false},"author":139,"featured_media":4635,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"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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