Person:
Ballester Pérez, Antonio

Loading...
Profile Picture
First Name
Antonio
Last Name
Ballester Pérez
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Químicas
Department
Area
Ciencia de los Materiales e Ingeniería Metalúrgica
Identifiers
UCM identifierDialnet ID

Search Results

Now showing 1 - 3 of 3
  • Publication
    Anaerobic Bioreduction of Jarosites and Biofilm Formation by a Natural Microbial Consortium
    (MDPI, 2019-01-29) Castro Roldán, Laura; Blázquez Izquierdo, María Luisa; González González, Felisa; Muñoz Sánchez, Jesús Ángel; Ballester Pérez, Antonio
    Jarosite occurs naturally in acid sulphate soils and is a common feature of streams impacted by acid mine drainage (AMD). Biological reduction of iron-sulphate minerals, such as jarosite, has the potential to contribute to the natural attenuation of acid mine drainage sites. The reduction of different jarosites (including minerals containing precious and toxic metals) by a natural bacterial/microbial consortium was examined in this study. Jarosites was used as a sole terminal electron acceptor via the reductive dissolution of Fe(III) minerals. The production of Fe(II) and the presence of sulphate-reducing bacteria in the consortium lead to the precipitation of metal sulphides immobilizing toxic heavy metals. Microbial attachment and biofilm formation of minerals have a great impact on the production and transformation of minerals and can influence the mobility of metals. After the adaptation to different jarosites, a unique specie was found: Desulfosporosinus orientis. Desulfosporosinus species are sulphate-reducing bacteria and can be found in sulphate-rich heavy metal-polluted environments, such as acid mine/rock drainage sites, being responsible for the sulphides formation. D. orientis is an obligate anaerobic microorganism and is able to reduce Fe(III) D. orientis is an obligate anaerobic microorganism and is able to reduce Fe(III). Confocal laser scanning microscopy and fluorescent lectin-binding analyses (FLBA) were used to study the arrangement and composition of the exopolysaccharides/glycoconjugates in biofilms indicating the presence of mannose, glucose, and N-acetylglucosamine residues. This study provides insights to understand the processes leading to the mobility or retention of metals in mine waste and industrial landfill environments.
  • Publication
    Exploring the Possibilities of Biological Fabrication of Gold Nanostructures Using Orange Peel Extract
    (MDPI, 2015-09-11) Castro Roldán, Laura; Blázquez Izquierdo, María Luisa; González González, Felisa; Muñoz Sánchez, Jesús Ángel; Ballester Pérez, Antonio
    Development of nanotechnology requires a constant innovation and improvement in many materials. The exploration of natural resources is a promising eco-friendly alternative for physical and chemical methods. In the present work, colloidal gold nanostructures were prepared using orange peel extract as a stabilizing and reducing agent. The initial pH value of the solution and the concentration of the gold precursor had an effect on the formation and morphology of nanoparticles. The method developed is environmentally friendly and allows control of nanoparticles. By controlling the pH and, especially, the gold concentration, we are able to synthesize crystalline gold nanowires using orange peel extract in the absence of a surfactant or polymer to direct nanoparticle growth, and without external seeding. UV-VIS spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD) were used to characterize the nanoparticles obtained by biosynthesis.
  • Publication
    Lixiviación del cinabrio mediante agentes complejantes en la metalurgia extractiva del mercurio
    (Universidad Complutense de Madrid, 2015) Ballester Pérez, Antonio; Núñez Alvarez, Carlos
    el estudio sobre la precipitación del mercurio de las soluciones de lixiviación del cinabrio en las que se encuentra en forma de ion complejo tetrabromomercuriato se ha llevado a cabo contemplando tres posibilidades: precipitación electroquímica del metal utilizando la corriente eléctrica como reductor; precipitación del oxido de mercurio rojo utilizando como reactivo precipitante el hidróxido sódico; y desplazamiento del mercurio por un metal mas activo que el en un proceso de cementación concretamente se utilizo polvo de hierro. en el primer y tercer caso se obtiene el metal en su estado elemental el segundo supone la obtención del mismo en su forma oxidada. de este modo se dispone de las dos materias primas mas utilizadas industrialmente en la actualidad.