{"id":26897,"date":"2018-03-09T09:18:56","date_gmt":"2018-03-09T09:18:56","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/biolixiviacion-de-calcopirita-a-45aoc-en-presencia-de-plata-estudios-basicos-y-en-continuo\/"},"modified":"2018-03-09T09:18:56","modified_gmt":"2018-03-09T09:18:56","slug":"biolixiviacion-de-calcopirita-a-45aoc-en-presencia-de-plata-estudios-basicos-y-en-continuo","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/biolixiviacion-de-calcopirita-a-45aoc-en-presencia-de-plata-estudios-basicos-y-en-continuo\/","title":{"rendered":"Biolixiviaci\u00f3n de calcopirita a 45\u00c2\u00bac en presencia de plata. estudios b\u00e1sicos y en continuo"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Cancho Rodr\u00edguez Laura Cristina <\/strong><\/h2>\n<p>En la memoria que se presenta se ha detallado un estudio sistem\u00e1tico sobre la biolixiviaci\u00f3n de concentrados de calcopirita empleando microorganismos term\u00f3filos moderados y plata. Se ha puesto a punto la biolixiviaci\u00f3n catalizada en un sistema de alimentaci\u00f3n en continuo. Dada la complejidad de este tipo de sistemas y del proceso de biolixiviaci\u00f3n por su car\u00e1cter multidisciplinar, para afrontar este an\u00e1lisis ha sido necesario dividirlo en varios bloques de estudio: puesta a punto del sistema en continuo, fijaci\u00f3n de la plata, cultivo bacteriano, mineral, y biolixiviaci\u00f3n.  se estudi\u00f3 la influencia de la temperatura (35, 45 y 68\u00c2\u00bac) en la fijaci\u00f3n de la plata sobre el concentrado calcopir\u00edtico.  se emplearon t\u00e9cnicas electroqu\u00edmicas y de an\u00e1lisis qu\u00edmico que establecieron que la temperatura no influye en el tiempo de fijaci\u00f3n y en todos los casos la plata mantn\u00eda una proporcionalidad con el cobre de 2\/1 mientras que el hierro y el cinc permanec\u00edan constantes. T\u00e9cnicas de difracci\u00f3n de rayos x de incidencia normal y rasante sobre calcopirita masiva con plata fijada a distintas temperaturas permitieron determinar que en la fijaci\u00f3n se produce un equilibrio entre las fases ag2s y ag0, preodiminando la primera a bajas temperaturas y la segunda a altas. Estas proporciones as\u00ed como el porcentaje de hierro, cobre y cinc analizados en superficie, resultaron ser muy diferentes en las muestras sometidas a biolixiviaci\u00f3n y en las no biolixiviadas. Todo parece indicar que en los procesos biolixiviados se establece un ambiente oxidante en el que se ve favorecida la presencia de  ag2s y, adem\u00e1s, la acci\u00f3n bacteriana regenera de forma constante la superficie de la calcopirita por lo que se consiguen una condiciones mucho m\u00e1s homog\u00e9neas a lo largo de todo el mineral. Tambi\u00e9n se determin\u00f3 que la temperatura  de fijaci\u00f3n de la plata a 35\u00c2\u00bac es mucho m\u00e1s favorable que a 45\u00c2\u00bac, por alcanzar mayores concentraciones de catalizad<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Biolixiviaci\u00f3n de calcopirita a 45\u00c2\u00bac en presencia de plata. estudios b\u00e1sicos y en continuo<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Biolixiviaci\u00f3n de calcopirita a 45\u00c2\u00bac en presencia de plata. estudios b\u00e1sicos y en continuo <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Cancho Rodr\u00edguez Laura Cristina <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 18\/11\/2003<\/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>Antonio Ballester Perez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: gabriel Ovejero escudero <\/li>\n<li>ricardo Amilis pibernat (vocal)<\/li>\n<li>felisa Gonz\u00e1lez gonz\u00e1lez (vocal)<\/li>\n<li>montserrat Cruells cadevall (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Cancho Rodr\u00edguez Laura Cristina En la memoria que se presenta se ha detallado un estudio sistem\u00e1tico sobre 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