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Álvarez-Álvarez JA, Aguilar-Aguilar A, Robledo-Cabrera A, Ocampo-Perez R, Leyva-Ramos R, Padilla-Ortega E. Contribution of halloysite as nanotubular clay mineral on mechanism and adsorption rate of Cd(II) onto nanocomposites alginate-halloysite. Environ Res 2023; 216:114772. [PMID: 36379235 DOI: 10.1016/j.envres.2022.114772] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/03/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
In this work nanocomposites based on alginate (Alg) and halloysite as a nanotubular clay (Hy) were developed. Characterization techniques reveal that Hy/Alg nanocomposites are cation exchangers with predominantly negative charge density and good thermal stability. The adsorption equilibrium of Cd(II) in aqueous solution onto Hy/Alg nanocomposites revealed that by increasing the mass of halloysite in the nanocomposite, the adsorption capacity diminished significantly due to the halloysite-alginate interactions. Maximum adsorption capacities of 8, 65, 88, and 132 mg/g of Cd(II) were obtained for samples Hy, Hy/Alg 50%, Hy/Alg 95%, and Alg, respectively. In addition, the adsorption equilibrium of Cd(II) on the Hy/Alg bionanocomposites was affected by the pH and temperature of the solution, demonstrating the presence of electrostatic interactions during adsorption and that this is an exothermic process. The controlling mechanism of adsorption was cation exchange influenced by electrostatic forces. The Cd(II) adsorption rate studies were interpreted by the diffusion-permeation model and reveal that the presence of Hy in the structure of the nanocomposites enhances the permeation coefficient, that is, the adsorption rate was increased. The values of the permeation coefficient varied from 1.95 × 10-7 to 8.50 × 10-7 cm2/s for Hy/Alg 50% and from 1.70 × 10-7 to 3.55 × 10-7 cm2/s for Hy/Alg 95%.
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Affiliation(s)
- J A Álvarez-Álvarez
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava, Martínez #6 Zona Universitaria, C.P., 78210, San Luis Potosí, Mexico
| | - A Aguilar-Aguilar
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava, Martínez #6 Zona Universitaria, C.P., 78210, San Luis Potosí, Mexico
| | - A Robledo-Cabrera
- Instituto de Metalurgia, Laboratorio de Química de Superficies, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550, San Luis Potosí, 78210, Mexico
| | - R Ocampo-Perez
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava, Martínez #6 Zona Universitaria, C.P., 78210, San Luis Potosí, Mexico
| | - R Leyva-Ramos
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava, Martínez #6 Zona Universitaria, C.P., 78210, San Luis Potosí, Mexico
| | - E Padilla-Ortega
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava, Martínez #6 Zona Universitaria, C.P., 78210, San Luis Potosí, Mexico.
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López-Valdivieso A, Robledo-Cabrera A, Uribe-Salas A. Flotation of celestite with the anionic collector sodium dodecyl sulfate. Effect of carbonate ions. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0301-7516(00)00004-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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