{"id":154203,"date":"2018-03-11T14:00:31","date_gmt":"2018-03-11T14:00:31","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/especiacion-y-determinacion-de-trazas-de-cd-cr-cu-ni-pb-zn-en-sedimentos-contaminados\/"},"modified":"2018-03-11T14:00:31","modified_gmt":"2018-03-11T14:00:31","slug":"especiacion-y-determinacion-de-trazas-de-cd-cr-cu-ni-pb-zn-en-sedimentos-contaminados","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica-analitica\/especiacion-y-determinacion-de-trazas-de-cd-cr-cu-ni-pb-zn-en-sedimentos-contaminados\/","title":{"rendered":"Especiaci\u00f3n y determinaci\u00f3n de trazas de cd, cr, cu, ni, pb, zn en sedimentos contaminados"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Jos\u00e9 Fermin Lopez Sanchez <\/strong><\/h2>\n<p>La presente tesis pretende contribuir al conocimiento sobre la determinaci\u00f3n y especiaci\u00f3n de metales pesados en sedimentos.\t en primer lugar se ensayaron dos m\u00e9todos de ataque para la determinaci\u00f3n  del contenido total de metal por espectroscopia de absorci\u00f3n at\u00f3mica. Ambos m\u00e9todos se comprobaron analizando el contenido de metales pesados en un material de referencia (srm-1645 del nbs). se comprob\u00f3, que para el estudio de la especiaci\u00f3n, el procedimiento de  extracciones secuenciales propuesto por tessier y col. Proporciona resultados poco satisfactorios al analizar muestras muy proporciona, por lo que fue necesario optimizar el procedimiento. En primer lugar se aplic\u00f3 un m\u00e9todo simplex que mostr\u00f3 la variable m\u00e1s importante de las estudiadas es la relaci\u00f3n volumen extractante  masa de sedimento. Una vez optimizada dicha variable para muestras muy contaminadas se compar\u00f3 el procedimiento resultante con otros procedimientos de especiaci\u00f3n. Finalmente se estudi\u00f3 el nivel de poluci\u00f3n por cd, cu, cr, ni, pb y zn en sedimentos tomados en la cuenca y la zona litoral situada frente a la de\u00c2\u00acsembocadura del r\u00edo bes\u00f3s.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Especiaci\u00f3n y determinaci\u00f3n de trazas de cd, cr, cu, ni, pb, zn en sedimentos contaminados<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Especiaci\u00f3n y determinaci\u00f3n de trazas de cd, cr, cu, ni, pb, zn en sedimentos contaminados <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Jos\u00e9 Fermin Lopez Sanchez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 21\/11\/1990<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li> <\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Mar\u00eda  Teresa Galceran Huguet <\/li>\n<li>Bernard Griepink (vocal)<\/li>\n<li>Juan Armengol Bachero (vocal)<\/li>\n<li>Francisco Jorge Garcia Montelongo (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Jos\u00e9 Fermin Lopez Sanchez La presente tesis pretende contribuir al conocimiento sobre la determinaci\u00f3n y especiaci\u00f3n de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","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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