Optimization of the synthesis process of zeolites with high cation exchange capacity using copper mine tailings as raw material

Espejel‐Ayala, Fabricio; Ramírez-Zamora, Rosa-María

doi:10.1002/ep.12766

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…Moreover, signals of feldspar appear in the pattern indicating the possible presence of calcium, sodium and potassium minerals; iron oxides signals are not observed. Amorphous halo shows the possibility to release silicon to synthesize SBA-15 material considering that vitreous or amorphous material are reactant to form zeolite type materials [23][24][25][26].…”

Section: Methodsmentioning

confidence: 99%

SBA-15 synthesis from sodium silicate prepared with sand and sodium hydroxide

Lázaro

Rodríguez-Valadéz

López

et al. 2020

Mater. Res. Express

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In the industry, sodium carbonate is used to prepare sodium silicate; however, this process generates great volumes of CO 2 . In this work, sodium hydroxide has been proposed to prepare sodium silicate using natural sand. Two experimental variables were considered, sodium hydroxide concentration and temperature to prepare sodium silicate. Results show the formation of sodium silicate with a NaOH:sand ratio = 1.1 at 550°C. Moreover, an economical revision was achieved to compare costs of sodium silicate with sodium hydroxide and sodium carbonate. The use of sodium hydroxide permits to decrease CO 2 emissions generated in the decomposition of sodium carbonate. Additionally, the sodium silicate prepared herein was used to synthesize a zeolite type material, SBA-15. SBA-15 obtained has similar characteristics than the commercial mesoporous material. The use of sodium silicate prepared with non-pure sand for preparing mesoporous materials is an economical and friendly environmental alternative.

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Section: Methodsmentioning

confidence: 99%

SBA-15 synthesis from sodium silicate prepared with sand and sodium hydroxide

Lázaro

Rodríguez-Valadéz

López

et al. 2020

Mater. Res. Express

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“…En este caso, se utiliza el método de intercambio iónico para modificar las zeolitas con iones Cu +2 , Ag + , entre otros con propiedades antimicrobianas. Los ensayos de fotocatálisis heterogénea para inactivar bacterias y virus normalmente emplean zeolitas comerciales, aunque otras zeolitas sintetizadas con precursores no convencionales también se han propuesto como una alternativa para disminuir posibles impactos ambientales asociados con el uso de Zamora, 2015;Sánchez-Ruíz et al, 2018;Coutino-González et al, 2018;Lázaro et al, 2020). Asimismo, se ha propuesto el uso de zeolitas naturales como materiales antimicrobianos.…”

Section: Nanopartículas Soportadas Sobre Zeolitasunclassified

El potencial de las nanopartículas de Ag y Cu para la fabricación de recubrimientos fotocatalíticos para mitigar la propagación de la COVID-19

Espejel‐Ayala

Vidal

López

2021

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En el trabajo se aborda el uso de diferentes tipos de nanopartículas (NP’) con propiedades fotocatalíticas y antimicrobianas, con posible uso para mitigar la propagación del virus SARS-CoV-2 que provoca la enfermedad COVID-19. El trabajo está estructurado con énfasis en el mecanismo por el cual las NPs de Ag y Cu pueden eliminar virus y bacterias. Posteriormente, se aborda la preparación de materiales, como las zeolitas, que contienen impregnadas a las NPs de Ag y Cu. Otras de las NPs presentadas son las de ZnO y TiO2, las cuales también presentan altas eficiencias para eliminar microorganismos. Por último, se analizan algunos trabajos en donde las NPs, en suspensión o soportadas, se emplearon para preparar pinturas. Estas pinturas se evaluaron para degradar algunos contaminantes atmosféricos; no obstante, lo más interesante fue su uso como recubrimientos antibacterianos. Si bien, la mayoría de los trabajos se enfocaron en comprobar las propiedades antimicrobianas de las pinturas, su uso se puede extender hacia la inactivación de virus, como el SARS-CoV-2. Esto permitiría utilizar estos recubrimientos en zonas con alta frecuencia del virus, como es el caso de hospitales o áreas de alto contacto humano.

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“…The acid mud can be neutralized using calcium oxide, however, larger volumes of solid waste are generated with the subsequent environmental problems associated. One strategy to mitigate this situation is the use of acid mud in construction applications or preparation of several types of materials, such as zeolites . Zeolites are microporous aluminosilicate materials with more than 200 of synthetic zeo‐types.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of MCM‐41 material from acid mud generated in the aluminum extraction of kaolinite mineral

Coutiño-González

Rocha

Robles

et al. 2018

Env Prog and Sustain Energy

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The use of acid mud produced during the aluminum extraction of kaolinite to synthesize mobil composition of matter no. 41 (MCM‐41) type material is proposed in this work. The acid mud was placed in contact with NaOH at 550°C to release the silicon and aluminum, then the fused material obtained was mixed with cetyltrimethylammonium bromide (CTAB) followed by a hydrothermal treatment considering a factorial design 2k with four experimental factors (CTAB dose, synthesis time, temperature, and solid/liquid ratio). The formation of MCM‐41 was evaluated via X‐ray diffraction (XRD) and scanning electron microscopy coupled with electrons dispersive spectroscopy (SEM‐EDS) analysis complemented with surface area analysis from which a maximum value of 550 m2/g was obtained for the best material. XRD results showed the typical pattern of MCM‐41 measured at low angle, furthermore, the characteristic type IV isotherm of adsorption–desorption was observed in certain materials. The elemental analysis showed the presence of iron and titanium oxide, which could be of great interest for the use of the material as a photocatalyst. Preliminary tests, using the MCM‐41 samples synthesized and methyl orange revealed a moderate photocatalytic activity of the material as compared to a commercial product (P25); opening up opportunities for the further development of such materials as potential and cost‐effective photocatalysts for pollutants degradation in wastewater. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13069, 2019

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Optimization of the synthesis process of zeolites with high cation exchange capacity using copper mine tailings as raw material

Cited by 4 publications

References 35 publications

SBA-15 synthesis from sodium silicate prepared with sand and sodium hydroxide

SBA-15 synthesis from sodium silicate prepared with sand and sodium hydroxide

El potencial de las nanopartículas de Ag y Cu para la fabricación de recubrimientos fotocatalíticos para mitigar la propagación de la COVID-19

Synthesis of MCM‐41 material from acid mud generated in the aluminum extraction of kaolinite mineral

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