Browsing by Subject "Removal"

Now showing 1 - 4 of 4
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    El jesuita Ignacio de las Casas y la defensa de la lengua árabe : memorial al padre Cristóbal de los Cobos, provincial de Castilla (1607)
    (Murcia : Editora Regional de Murcia, 2011) El Alaoui, Youssef; Editora Regional de Murcia
    Introducción al memorial redactado por el jesuita morisco Ignacio de las Casas (1550-1608) en 1607 por encargo del padre Cristóbal de los Cobos (hacia 1553-1611), provincial de Castilla de 1605 a 1609. El texto, extractado a continuación, consta de 66 folios y forma parte de un conjunto de cuatro textos, redactados por nuestro autor entre 1605 y 1607, reunidos bajo el título De los moriscos de España.
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    Magnetic core‑modified silver nanoparticles for ibuprofen removal: an emerging pollutant in waters
    (Nature Research, 2020-10-26) Vicente Martínez, Yésica; Solana González, Ruben; Soto Meca, Antonio; Caravaca, Manuel; Química Analítica
    In this work we present a novel procedure for ibuprofen adsorption from waters employing magnetic core-modified silver nanoparticles. We demonstrate that 93% adsorption of ibuprofen is achieved in 45 min by means of a simple method, for neutral pH and room temperature, also using a low dose of adsorbent, equal to 7 mg in 500 �L of suspension. The characterization of the adsorbent, before and after adsorption, was carried out by means of field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, BET analysis, Fourier-transform infrared spectroscopy and differential scanning calorimetry. It is worth pointing out that ibuprofen can be desorbed and the adsorbent can be reused, remaining unaltered for the first three cycles, and showing 89.3% adsorption efficiency after the third regeneration. A three-parameter model and the Langmuir isotherm characterize the kinetics and isotherm of adsorption.
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    Poética de la ausencia en la obra lírica de Idea Vilariño.
    (Universidad de Murcia, Servicio de Publicaciones, 2022) Carrión, Gabriel
    A lo largo de estas páginas vamos a tratar de poner en valor la obra poética de una de las más eminentes voces femeninas de la literatura uruguaya del siglo pasado: Idea Vilariño. Vamos a ahondar en una serie de cuestiones relacionadas con su obra literaria y plantear una hipótesis que nos permita recorrer toda su producción poética. Ahondaremos dentro de su poética desarrollando un concepto que hemos decidido denominar “poética de la ausencia”, definido como la expresión de la ausencia en distintos grados. Esta forma particular de poetizar se hace efectiva mediante distintos mecanismos. Gracias a estos mecanismos también podremos determinar una serie de zonas o etapas dentro de su poesía a la luz de nuestra hipótesis.
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    Total removal of Hg (II) from wastewater using magnetic nanoparticles coated with nanometric Ag and functionalized with sodium 2-mercaptoethane sulfonate
    (Springer Nature, 2020-03-17) Vicente Martínez, Yésica; Caravaca, Manuel; Soto Meca, Antonio; Química Analítica
    Divalent mercury (Hg (II)) is the predominant mercury species in aquatic environments. Hg (II) combines easily with human enzymes, thus causing acute diseases, even at very low concentrations. Among existing procedures to remove Hg (II) from water, adsorption is widely used, achieving high removal efficiencies. However, most actual adsorption techniques require high temperatures, long times or tedious procedures. Here we present a novel, simple and fast method to remove Hg (II) from wastewater by using magnetic-core nanoparticles coated with metallic silver and functionalized with sodium 2-mercaptoethane sulfonate. This adsorbent was characterized by field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy and Brunauer–Emmett–Teller analysis, which showed a contact surface area of the adsorbent equal to 116.476 m2/g. The equilibrium isotherm is characterized by the Langmuir model. Results show that 100% adsorption efficiency is achieved in 30 seconds of contact time, at pH 6.2 and room temperature, employing a low dose of adsorbent. The adsorbent can be recovered and recycled, keeping 100% adsorption efficiency for two additional cycles. The presence of other ions commonly found in aqueous media does not interfere with Hg (II) adsorption.