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Título:
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Al-Waste-Based Zeolite Adsorbent Used for the Removal of Ammonium from Aqueous Solutions
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Autores:
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Sánchez-Hernández, Ruth ;
Padilla, Isabel ;
López Andrés, Sol ;
López Delgado, Aurora
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Tipo de documento:
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texto impreso
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Editorial:
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Hindawi Publishing Corporation, 2018
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Dimensiones:
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application/pdf
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Nota general:
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cc_by
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Geología: Edafología
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Materia = Ciencias: Geología: Geoquímica
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Materia = Ciencias: Geología: Mineralogía
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Materia = Ciencias: Geología: Hidrología
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Tipo = Artículo
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Resumen:
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This work evaluates the use of a synthetic NaP1 zeolite obtained from a hazardous Al-containing waste for the removal of ammonium (NH4+) from aqueous solutions by batch experiments. Experimental parameters, such as pH (6–8), contact time (1–360?min), adsorbent dose (1–15?g/L), and initial NH4+ concentration (10–1500?mg/L), were evaluated. Adsorption kinetic models and equilibrium isotherms were determined by using nonlinear regression. The kinetic was studied by applying both the pseudo-first-order and pseudo-second-order models. The equilibrium isotherms were analyzed according to two-parameter equations (Freundlich, Langmuir, and Temkin) and three-parameter equations (Redlich–Peterson, Sips, and Toth). The results showed that the NH4+ uptake on NaP1 was fast (15?min) leading to a high experimental sorption capacity (37.9?mg/g). The NH4+ removal on NaP1 was a favorable process that followed the pseudo-first-order kinetic model. The NH4+ adsorption was better described by the Sips (54.2?mg/g) and Toth (58.5?mg/g) models. NaP1 zeolite from Al-waste showed good NH4+ sorption properties, becoming a potential adsorbent to be used in the treatment of contaminated aqueous effluents. Thus, a synergic effect on the environmental protection can be achieved: the end of waste condition of a hazardous waste and the water decontamination.
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En línea:
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https://eprints.ucm.es/51117/1/Al-Waste-Based%20Zeolite%20Adsorbent%20Used%20for%20the%20Removal%20of%20Ammonium%20from%20Aqueous%20Solutions.pdf
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