{"id":116731,"date":"2018-03-11T10:45:57","date_gmt":"2018-03-11T10:45:57","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-geoqua%c2%admico-de-elementos-traza-en-suelos-de-la-region-de-murcia-y-deteccion-de-anomala%c2%adas-contaminacion\/"},"modified":"2018-03-11T10:45:57","modified_gmt":"2018-03-11T10:45:57","slug":"estudio-geoqua%c2%admico-de-elementos-traza-en-suelos-de-la-region-de-murcia-y-deteccion-de-anomala%c2%adas-contaminacion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica-analitica\/estudio-geoqua%c2%admico-de-elementos-traza-en-suelos-de-la-region-de-murcia-y-deteccion-de-anomala%c2%adas-contaminacion\/","title":{"rendered":"Estudio geoqu\u00edmico de elementos traza en suelos de la regi\u00f3n de murcia y detecci\u00f3n de anomal\u00edas\/contaminaci\u00f3n."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Joaquin Lopez Sanchez <\/strong><\/h2>\n<p>Objetivos determinar los contenidos de elementos traza (cr, co, ni, cu, zn, as, se, cd, sb, hg, tl y pb), elementos mayoritarios y caracter\u00edsticas mineral\u00f3gicas de suelos no contaminados, seleccionados de diferentes grupos litol\u00f3gicos, en la regi\u00f3n de murcia. estudiar las posibles relaciones entre los elementos traza y diferentes propiedades f\u00edsico qu\u00edmicas y mineral\u00f3gicas de los materiales seleccionados en la regi\u00f3n de murcia. determinar la variabilidad geoqu\u00edmica de elementos traza (cr, co, ni, cu, zn, as, se, cd, sb, hg, tl y pb) en los suelos seleccionados. identificar la existencia de  zonas con anomal\u00edas\/ contaminaci\u00f3n de elementos traza (cr, co, ni, cu, zn, as, se, cd, sb, hg, tl y pb) en la regi\u00f3n de murcia mediante la aplicaci\u00f3n de \u00edndices de contaminaci\u00f3n\/enriquecimiento. metodolog\u00eda para alcanzar los objetivos propuestos y de acuerdo con el plan de trabajo, se han utilizado muestras del banco de suelos del grupo de investigaci\u00f3n &quot;contaminaci\u00f3n de suelos&quot; de la universidad de murcia  (gcsmu). Podemos distinguir entre dos tipos de muestras: muestras seleccionadas para el estudio geoqu\u00edmico y muestras seleccionadas para detectar anomal\u00edas\/contaminaci\u00f3n en la regi\u00f3n de murcia.  a partir del banco de suelos, donde part\u00edamos de 451 muestras, se seleccionaron 108 muestras para llevar a cabo el estudio geoqu\u00edmico m\u00e1s detallado, de manera que se pudiera hacer un estudio estad\u00edstico representativo con un n\u00famero de muestras adecuado en funci\u00f3n de la litolog\u00eda se las muestras.  conclusiones los elementos traza cr, zn, ni, co, cu y as se encuentran, en general, asociados a  silicoaluminatos y \u00f3xidos de hierro, particularmente a filosilicatos a 10 ? Y 14 ?, Minerales del material litol\u00f3gico, y adem\u00e1s son m\u00e1s abundantes en suelos en los que predomina la fracci\u00f3n arcilla y limo, su origen puede ser geog\u00e9nico. El pb presenta un comportamiento distinto y niveles elevados en suelos con minerales calcita y\/o dolomita, con alto contenido en carbonatos. Su origen puede ser geog\u00e9nico o antropog\u00e9nico, y  en cada zona en que se presenten anomal\u00eda, ser\u00e1 preciso estudiarla con detalle.  el contenido en elementos traza m\u00e1s elevado de los diferentes grupos litol\u00f3gicos est\u00e1 en los materiales metam\u00f3rficos, gl 14, (excepto para el pb, que est\u00e1 el m\u00e1ximo en los limos rojos), y el menor en gl 16, limos rojos y costras. El orden de abundancia de elementos traza, en general,  es cr&gt;zn&gt;ni&gt;cu&gt;as&gt;co&gt;pb, el resto est\u00e1n a niveles muy escasos. seg\u00fan el an\u00e1lisis cluster realizado, todos los grupos litol\u00f3gicos se parecen entre si (los materiales con m\u00e1s carbonatos), menos el gl 14 (metam\u00f3rficos), y el gl 16, limos rojos y costras. las t\u00e9cnicas estad\u00edsticas que combinan con an\u00e1lisis geoqu\u00edmicos pueden ser una herramienta \u00fatil para proveer identificaci\u00f3n de fuentes. Sin embargo, no siempre se utilizan los mismos par\u00e1metros (media, mediana, media geom\u00e9trica, etc.) Siendo necesaria una armonizaci\u00f3n de m\u00e9todos. los resultados obtenidos para los \u00edndices de contaminaci\u00f3n\/ geoconcentraci\u00f3n  (igeo) para la regi\u00f3n de murcia, nos indican que as, cd, co, cr, cu, ni, se y tl se encuentran en el nivel de fondo correspondiente a su grupo litol\u00f3gico o menor en m\u00e1s del 80%. El pb, zn, sb y hg lo estar\u00e1n en m\u00e1s del 50 %. Las anomal\u00edas se presentan en hg (aunque su concentraci\u00f3n es muy escasa y son puntuales, 12%), en el pb en un 7 % y en sb y tl en menos del 2 %.  existe una gran variabilidad espacial en la litolog\u00eda de los materiales sedimentarios carbonatados de la regi\u00f3n de murcia, lo que conlleva una gran dificultad para realizar el dise\u00f1o de muestro y toma de muestras para la detecci\u00f3n de anomal\u00edas o contaminaci\u00f3n de metales pesados. En este tipo de materiales ser\u00eda preciso muestrear a escala de detalle en las zonas de anomal\u00edas detectadas.   aims determining the content of trace elements (cr, co, ni, cu, zn, as, se, cd, sb, hg, tl and pb), majority elements percentage and mineralogical composition of non-contaminated soils selected from different lithologic groups in murcia region.  to study the possible relationships among the trace elements and the different physical, chemical and mineralogical properties of the selected materials from the murcia region.   determining the geochemical variability of the trace elements (cr, co, ni, cu, zn, as, se, cd, sb, hg, tl y pb) in the selected soils samples.   to identify the existence of zones with anomalies\/contamination of the trace elements (cr, co, ni, cu, zn, as, se, cd, sb, hg, tl y pb) in murcia region by the way of contamination\/enrichment indexes.  methodology  to achieve the proposed aims, and according to the working plan, samples from the soil bank of the research group &quot;soil contamination&quot;&apos; of the university of murcia (gcsmu) have been used. We can distinguish between two types of samples: those selected for the geochemical study and those selected to detect anomalies\/contamination in the region of murcia.  108 samples from the soil bank were selected, from 451 original samples, for a more detailed geochemical study with the objective of doing a statistically representative evaluation with an adequate number of samples, based on their lithology.  conclusions  the trace elements (cr, co, ni, cu, zn, as, se, cd, sb, hg, tl y pb) are founded, in general terms, associated to aluminosilicates and iron oxides, specifically to the phyllosilicates 10 ? Y 14 ?, Minerals of the lithologic material, and what is more, they are more abundant in soils where the clay and silt predominate: it&apos;s origin can be geogenic. Lead presents a distinctive behavior and showed high content in soils with calcite and\/or dolomite, with high carbonate content. Its origin could be geogenic or anthropogenic, and in each zone where anomalous values are found, a detailed study would be necessary..  the highest content of trace elements from the different lithologic groups was found in the metamorphic material gl14 (with exception of the pb, at its maximum in the red limes), and the lowest in the gl16, red limes. The trace elements abundance order is, in general (cr&gt;zn&gt;ni&gt;cu&gt;as&gt;co&gt;pb). The rest appear in very low levels.  according to the cluster analysis carried out, all the lithologic groups are similar between them (the materials with higher carbonates content), except the gl 14 (metamorphic) and the gl16 (red limes).  the statistical techniques that combine with geochemical analysis can be a useful tool to provide source identification. Nevertheless, the same parameters are not always used (mean, median, geometric mean, etc.) And a methodological harmonization is required.  the results obtained for the contamination\/geoconcentration (lgeo) indexes in the region of murcia show that as, cd, co, cr, cu, ni, se y tl are found in the bottom level corresponding to their lithologic group, or less, in more than the 80% of the cases. Pb, zn, sb y hg will be in more of the 50%. The anomalies appear in the hg (despite its concentration is scarce and punctual) in a 12%, the pb in a 7% and the sb and ti in less than a 2%. high spatial variability was found in the lithology of the carbonated sedimentary materials of the murcia region, and that implies big difficulties in the sampling design an collection in order or detect the anomalies or contamination of heavy metals.  when anomalies or contamination sources are present in this kind of materials, a detailed sample collection is required.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio geoqu\u00edmico de elementos traza en suelos de la regi\u00f3n de murcia y detecci\u00f3n de anomal\u00edas\/contaminaci\u00f3n.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio geoqu\u00edmico de elementos traza en suelos de la regi\u00f3n de murcia y detecci\u00f3n de anomal\u00edas\/contaminaci\u00f3n. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Joaquin Lopez Sanchez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Murcia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 28\/11\/2014<\/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>Mar\u00eda De La Luz Garc\u00eda Lorenzo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: carmen P\u00e9rez sirvent <\/li>\n<li>pablo Higueras higueras (vocal)<\/li>\n<li>n\u00faria Roca pascual (vocal)<\/li>\n<li>asuncion Roig garcia-ferrandez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Joaquin Lopez Sanchez Objetivos determinar los contenidos de elementos traza (cr, co, ni, cu, zn, as, se, 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