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Synthesis and Characterization of α-Al2O3/Ba-β-Al2O3 Spheres for Cadmium Ions Removal from Aqueous Solutions

dc.contributor.authorSilva Holguín, Pamela Nair
dc.contributor.authorRuíz Baltazar, Álvaro de Jesús
dc.contributor.authorMedellín Castillo, Nahum Andres
dc.contributor.authorLabrada Delgado, Gladis Judith
dc.contributor.authorReyes López, Simón Yobanny
dc.date.accessioned2023-06-08T17:30:24Z
dc.date.available2023-06-08T17:30:24Z
dc.date.issued2022
dc.identifier.citationSilva-Holguín, P.N.; Ruíz-Baltazar, Á.d.J.; Medellín-Castillo, N.A.; Labrada-Delgado, G.J.; Reyes-López, S.Y. Synthesis and Characterization of ?-Al2O3/Ba-?-Al2O3 Spheres for Cadmium Ions Removal from Aqueous Solutions. Materials 2022, 15, 6809. https://doi.org/10.3390/ma15196809
dc.identifier.urihttp://hdl.handle.net/11627/6048
dc.description.abstract"The search for adsorbent materials with a certain chemical inertness, mechanical resistance, and high adsorption capacity, as is the case with alumina, is carried out with structural or surface modifications with the addition of additives or metallic salts. This research shows the synthesis, characterization, phase evolution and Cd(II) adsorbent capacity of ?-Al2O3/Ba-?-Al2O3 spheres obtained from ?-Al2O3 nanopowders by the ion encapsulation method. The formation of the Ba-?-Al2O3 phase is manifested at 1500 °C according to the infrared spectrum by the appearance of bands corresponding to AlO4 bonds and the appearance of peaks corresponding to Ba-O bonds in Raman spectroscopy. XRD determined the presence of BaO·Al2O3 at 1000 °C and the formation of Ba-?-Al2O3 at 1600 °C. Scanning electron microscopy revealed the presence of spherical grains corresponding to ?-Al2O3 and hexagonal plates corresponding to ?-Al2O3 in the spheres treated at 1600 °C. The spheres obtained have dimensions of 4.65 ± 0.30 mm in diameter, weight of 43 ± 2 mg and a surface area of 0.66 m2/g. According to the curve of pH vs. zeta potential, the spheres have an acid character and a negative surface charge of ?30 mV at pH 5. Through adsorption studies, an adsorbent capacity of Cd(II) of 59.97 mg/g (87 ppm Cd(II)) was determined at pH 5, and the data were fitted to the pseudo first order, pseudo second order and Freundlich models, with correlation factors of 0.993, 0.987 and 0.998, respectively."
dc.publisherMDPI
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectSpheres
dc.subjectCadmium
dc.subjectAdsorption
dc.subjectPhase transformation
dc.subject.classificationQUÍMICA
dc.titleSynthesis and Characterization of α-Al2O3/Ba-β-Al2O3 Spheres for Cadmium Ions Removal from Aqueous Solutions
dc.typearticle
dc.identifier.doihttps://doi.org/10.3390/ma15196809
dc.rights.accessAcceso Abierto


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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
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