Development of a Zeolite A/LDH Composite for Simultaneous Cation and Anion Removal

Bezerra, Breno Gustavo Porfírio; Bieseki, Lindiane; Silva, Djalma Ribeiro da; Pergher, Sibele Berenice Castellã

doi:10.3390/ma12040661

Cited by 10 publications

(3 citation statements)

References 23 publications

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“…The procedure for synthesizing Al,Mg-LDH was based on the methodology used by (Climent et al, 2004), with Mg/Al = 3. The synthesis of the composite was carried out according to the methodology of [ 31 ], wherein the synthetic methodologies of zeolite A and LDH with Al/Mg = 3 ratios were adapted.…”

Section: Methodsmentioning

confidence: 99%

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Memory Effect on a LDH/zeolite A Composite: An XRD In Situ Study

et al. 2021

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In this memory effect study, hydrotalcite-type compounds in the lamellar double hydroxide-like (LDH)/zeolite A composite material were analyzed using X-Ray Diffration XRD) in situ experiments. Three samples were analyzed: Al,Mg-LDH, Al,Mg-LDH/ZA composite, and a physical mixture (50/50 wt%) of zeolite A and Al,Mg-LDH. The Al,Mg-LDH sample was treated at 500 °C in an O2 atmosphere and subsequently rehydrated. The Al,Mg-LDH/ZA composites had three treatments: one was performed at 300 °C in a He atmosphere, and two treatments were performed with an O2 atmosphere at 300 and 500 °C. In the physical mixture, two treatments were carried out under O2 flow at 500 °C and under He flow at 300 °C. Both went through the rehydration process. All samples were also analyzed by energy dispersive spectroscopy (EDS) and scanning electron microscopy (SEM). The results show that the LDH phase in the Al,Mg-LDH/ZA compounds has memory effects, and thus, the compound can be calcined and rehydrated. For the LDH in the composite, the best heat treatment system is a temperature of 300 °C in an inert atmosphere.

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Section: Methodsmentioning

confidence: 99%

“…Recently, our research group synthesized a composite material based on zeolite A and Al,Mg-LDH for the simultaneous adsorption of cations and anions of produced water [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Memory Effect on a LDH/zeolite A Composite: An XRD In Situ Study

et al. 2021

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“…Zeolite A (ZA), MgAl LDH, and ZA/MgAl LDH were prepared and applied for the removal of both cationic (Al, Cd, Cu, Mn, Ni, Pb, and Zn) and anionic (Cl, Br, NO 3 , CN, SO 4 , and PO 3 ) contaminants from oil-wastewater [110]. The prepared materials achieved an adsorption removal that varied from 80 to 100% of cations and from 60 to 100% for the different anions.…”

Section: Ldhs/ldh-based Materials For Removal Of Oil Wastewatermentioning

confidence: 99%

Recent Breakthrough in Layered Double Hydroxides and Their Applications in Petroleum, Green Energy, and Environmental Remediation

et al. 2022

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The fast development of the world civilization is continuously based on huge energy consumption. The extra-consumption of fossil fuel (petroleum, coal, and gas) in past decades has caused several political and environmental crises. Accordingly, the world, and especially the scientific community, should discover alternative energy sources to safe-guard our future from severe climate changes. Hydrogen is the ideal energy carrier, where nanomaterials, like layered double hydroxides (LDHs), play a great role in hydrogen production from clean/renewable sources. Here, we review the applications of LDHs in petroleum for the first time, as well as the recent breakthrough in the synthesis of 1D-LDHs and their applications in water splitting to H2. By 1D-LDHs, it is possible to overcome the drawbacks of commercial TiO2, such as its wide bandgap energy (3.2 eV) and working only in the UV-region. Now, we can use TiO2-modified structures for infrared (IR)-induced water splitting to hydrogen. Extending the performance of TiO2 into the IR-region, which includes 53% of sunlight by 1D-LDHs, guarantees high hydrogen evolution rates during the day and night and in cloudy conditions. This is a breakthrough for global hydrogen production and environmental remediation.

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