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Abstract:

Hybrid mesoporous materials are potentially useful for metal ion scavenging and retrieval because of their high surface areas, controlled accessibility and tailored functionalization. Some aspects that are linked to the performance of HMM include pore accessibility, stability of the organic functions and reusability. Knowledge of these aspects is critical in the design of adsorption-desorption protocols. In this work we produce and characterize propylamino-substituted large pore silica (SBA-15-N), which is submitted to Cu(II) adsorption from copper sulfate solutions, followed by desorption in acid media and material regeneration. We find that the hybrid material is an efficient adsorbent (1.15-1.75mmolCu(II)g -1), although a fraction of the organic groups is lost during the adsorption process. An X-ray photoelectron spectroscopy (XPS) study demonstrates that the contents of amino groups are higher in the material surface, leading to different behaviors in Cu(II) complexation along the material. These materials can be regenerated by exposure to acidic media. Thermal processing of the hybrid materials leads to better durability in aqueous solutions during reprocessing, due to enhanced polycondensation of the inorganic framework. Thermally treated samples, once regenerated, are efficient adsorbents in a second step of Cu(II) adsorption. We discuss the materials processing factors involved in the improved adsorption of Cu(II), its quantitative release and reusability of the material. © 2012 Elsevier B.V.

Registro:

Documento: Artículo
Título:Aminopropyl-modified mesoporous silica SBA-15 as recovery agents of Cu(II)-sulfate solutions: Adsorption efficiency, functional stability and reusability aspects
Autor:Lombardo, M.V.; Videla, M.; Calvo, A.; Requejo, F.G.; Soler-Illia, G.J.A.A.
Filiación:Gerencia Química, Centro Atómico Constituyentes, CNEA, Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
Rhein Chemie Argentina, Luis María Drago 1555, B1852LGS Burzaco, Buenos Aires, Argentina
INIFTA-CONICET, Universidad Nacional de La Plata, CC 16 Sucursal 4, 1900, La Plata, Argentina
DQIAyQF, FCEN, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA, Buenos Aires, Argentina
Palabras clave:Aminopropyl function; Hybrid adsorbents; Ion scavenging; Mesoporous materials; Reusable adsorbent; Sol-gel; Water treatment; Acid media; Acidic media; Adsorption desorption; Adsorption efficiency; Adsorption process; Amino group; Aminopropyl; Copper sulfate; Cu adsorption; Functionalizations; High surface area; Hybrid adsorbents; Large pores; Material surface; Materials processing; Mesoporous Silica; Organic function; Organic group; Sulfate solutions; X-ray photoelectron spectroscopy studies; Adsorbents; Adsorption; Desorption; Hybrid materials; Materials properties; Metal ions; Photoelectrons; Polycondensation; Reusability; Silica; Sol-gels; Water treatment; X ray photoelectron spectroscopy; Mesoporous materials; copper sulfate; sba 15 n; silicon dioxide; unclassified drug; adsorption; cation; complexation; copper compound; desorption; recycling; scavenging (chemistry); silica; sulfate; wastewater; water treatment; X-ray spectroscopy; adsorption; article; complex formation; molecular stability; polymerization; porosity; substitution reaction; synthesis; X ray photoelectron spectroscopy; Adsorption; Copper Sulfate; Microscopy, Electron, Scanning; Photoelectron Spectroscopy; Porosity; Propylamines; Recycling; Silicon Dioxide; Spectroscopy, Fourier Transform Infrared; Surface Properties; Water Pollutants, Chemical; Water Purification
Año:2012
Volumen:223-224
Página de inicio:53
Página de fin:62
DOI: http://dx.doi.org/10.1016/j.jhazmat.2012.04.049
Título revista:Journal of Hazardous Materials
Título revista abreviado:J. Hazard. Mater.
ISSN:03043894
CODEN:JHMAD
CAS:copper sulfate, 7758-98-7, 7758-99-8; silicon dioxide, 10279-57-9, 14464-46-1, 14808-60-7, 15468-32-3, 60676-86-0, 7631-86-9; Copper Sulfate, 7758-98-7; Propylamines; SBA-15; Silicon Dioxide, 7631-86-9; Water Pollutants, Chemical
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03043894_v223-224_n_p53_Lombardo

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Citas:

---------- APA ----------
Lombardo, M.V., Videla, M., Calvo, A., Requejo, F.G. & Soler-Illia, G.J.A.A. (2012) . Aminopropyl-modified mesoporous silica SBA-15 as recovery agents of Cu(II)-sulfate solutions: Adsorption efficiency, functional stability and reusability aspects. Journal of Hazardous Materials, 223-224, 53-62.
http://dx.doi.org/10.1016/j.jhazmat.2012.04.049
---------- CHICAGO ----------
Lombardo, M.V., Videla, M., Calvo, A., Requejo, F.G., Soler-Illia, G.J.A.A. "Aminopropyl-modified mesoporous silica SBA-15 as recovery agents of Cu(II)-sulfate solutions: Adsorption efficiency, functional stability and reusability aspects" . Journal of Hazardous Materials 223-224 (2012) : 53-62.
http://dx.doi.org/10.1016/j.jhazmat.2012.04.049
---------- MLA ----------
Lombardo, M.V., Videla, M., Calvo, A., Requejo, F.G., Soler-Illia, G.J.A.A. "Aminopropyl-modified mesoporous silica SBA-15 as recovery agents of Cu(II)-sulfate solutions: Adsorption efficiency, functional stability and reusability aspects" . Journal of Hazardous Materials, vol. 223-224, 2012, pp. 53-62.
http://dx.doi.org/10.1016/j.jhazmat.2012.04.049
---------- VANCOUVER ----------
Lombardo, M.V., Videla, M., Calvo, A., Requejo, F.G., Soler-Illia, G.J.A.A. Aminopropyl-modified mesoporous silica SBA-15 as recovery agents of Cu(II)-sulfate solutions: Adsorption efficiency, functional stability and reusability aspects. J. Hazard. Mater. 2012;223-224:53-62.
http://dx.doi.org/10.1016/j.jhazmat.2012.04.049