Post-synthesis fluoride treatment of Analcime zeolite synthesized using a novel organic template. Crystalline, textural, and acid study

Chouat, Nadjat; Bensafi, Boumediéne; Djafri, Fatiha

doi:10.1007/s11164-021-04606-4

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…In the FTIR spectrum related to Analcime, the water molecule's bending and stretching band on zeolite's surface can be seen at 1642 cm −1 and 3459 cm −1 . In the case of clinoptilolite, these bands can be apprehended at 1642 cm −1 and 3437 cm −1 [59][60][61][62].…”

Section: Characterization Of Nanoparticles Nanocomposites and Granulesmentioning

confidence: 99%

Preparation and characterization of nano- Fe(OH)₃, its composites with two natural zeolites, and granulation of them for nitrate removal from polluted water

Khatamian¹,

Nami²,

Hajimosayeb³

et al. 2023

Phys. Scr.

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The development of a cost-efficient, highly effective, and granular shape adsorbent is highly desired for nitrate removal. In this study, two different Fe(OH)3 nanoparticles with amorphous and crystalline structures, and nanocomposites were successfully synthesized using the ultrasonic-assisted co-precipitation. Both nanoparticles were scrutinized using FTIR, SEM, and XRD. Crystallized Fe(OH)3/zeolite nanocomposites were not efficient for nitrate removal;hence, the rest of the study was carried out with amorphous Fe(OH)3 nanoparticles (Am-Fe(OH)3). Clinoptilolite and analcime were acid-washed and used as a support for synthesized Am-Fe(OH)3 nanoparticles. Nanocomposites of clinoptilolite and analcime were abbreviated as Fe(OH)3/Clin and Fe(OH)3/Anc, respectively. The nanocomposites were characterized by BET, FTIR, SEM, EDS, and XRD techniques. Subsequently, granules of the above-mentioned nanocomposites were prepared using the wet gelation method and alginate. Two crucial features of pH and adsorbent:alginate ratio, were assessed and optimized as 11-12 and 1:3, respectively. The performance of granules were investigated regarding pH, time, and adsorbent dosage. Fe(OH)3/Clin and Fe(OH)3/Anc granules removed 96.82% and 34.02% of nitrate from a contaminated solution with initial concertation of 50mg/L. Overall, Fe(OH)3/Clin granule was an effective adsorbent for nitrate removal. The maximum adsorption capacity of Fe(OH)3/Anc and Fe(OH)3/Clin were 0.4443 mg/g and 5.6211 mg/g for 0.2 g of each adsorbent, respectively. Both adsorbents displayed good compatibility with the pseudo-second-order kinetic model.

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Section: Characterization Of Nanoparticles Nanocomposites and Granulesmentioning

confidence: 99%

Preparation and characterization of nano- Fe(OH)₃, its composites with two natural zeolites, and granulation of them for nitrate removal from polluted water

Khatamian¹,

Nami²,

Hajimosayeb³

et al. 2023

Phys. Scr.

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“…Analcime, characterized as a microporous zeolite [29], [30], [31] with narrow elliptical channels of uniform structure [33], [41] exhibits notable attributes such as a high specific surface area, cation exchange [28], [32], [41], and catalytic potential capacities [13], efficient adsorption per unit surface area [15], [23] and absorbent capabilities [14]. Analcime has a flexible lattice structure [34] with a high density and large channel diameters, allowing for easy fluid penetration [35], [36], [37]. The microhardness of analcime was decreased due to the presence of water that is structurally bonded [39].…”

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 99%

Mitigation Measures of Swelling Characteristics in Alkali-Contaminated Red Earth using Fly Ash and GGBS Blends

Kumar Darapu,

Vindula

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Alkali contamination induces swelling in the inherently non-swelling soils, resulting in heave severely damaging the sub and superstructures. Stabilization measures must be taken in vulnerable areas to prevent such colossal losses. Considerable research has been conducted regarding the swelling behavior of soils contaminated with alkalis and the impact of subsequent stabilization techniques utilizing different industrial byproducts and pozzolanic materials. However, there is a paucity of such studies on the Red Earth (RE) of the Visakhapatnam region. Furthermore, limited attention was given to the effects of extremely low concentrations of alkalis on the swelling behavior of soils. RE in the study area of the Visakhapatnam region predominantly consists of quartz, kaolinite, and hematite. In phase 1 of the experimental analysis, RE was contaminated with a highly dilute NaOH solution (0.05 N), and the resulting swell characteristics were investigated. A free swell of 10% was observed. One-dimensional standard oedometer tests revealed an equilibrium swelling of 5.6%, indicating significant potential for substantial heave and subsequent damage. X-ray diffraction (XRD) analysis revealed the formation of natrolite and analcime zeolites with a hollow structure, which caused the swell. Peaks of silicate minerals like paragonite and ussingite were also observed, indicating the dissolution of authigenic minerals and new precipitations even at lower concentrations of NaOH. In phase 2, swell tests were conducted on a mixture of contaminated red earth (50% w/w), fly ash (25% w/w), and ground granulated blast furnace slag (GGBS, 25% w/w), and it was observed that the swelling was completely arrested. XRD analysis unveiled that even though siliceous zeolites were formed, the development of chrysotile, attapulgite, tobermorite, and dicalcium silicate effectively inhibited the swelling with their pozzolanic behavior.

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Hierarchized ZSM-5 Zeolite Synthesis using N-Methyldiethanolamine as a Novel Desilicate Agent: Impact on Methanol Adsorption and Resistance Improvement to Coke Poisoning

Chouat,

Maziz,

Bensafi

et al. 2024

J Inorg Organomet Polym

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Post-synthesis fluoride treatment of Analcime zeolite synthesized using a novel organic template. Crystalline, textural, and acid study

Cited by 5 publications

References 19 publications

Preparation and characterization of nano- Fe(OH)₃, its composites with two natural zeolites, and granulation of them for nitrate removal from polluted water

Preparation and characterization of nano- Fe(OH)₃, its composites with two natural zeolites, and granulation of them for nitrate removal from polluted water

Mitigation Measures of Swelling Characteristics in Alkali-Contaminated Red Earth using Fly Ash and GGBS Blends

Hierarchized ZSM-5 Zeolite Synthesis using N-Methyldiethanolamine as a Novel Desilicate Agent: Impact on Methanol Adsorption and Resistance Improvement to Coke Poisoning

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Post-synthesis fluoride treatment of Analcime zeolite synthesized using a novel organic template. Crystalline, textural, and acid study

Cited by 5 publications

References 19 publications

Preparation and characterization of nano- Fe(OH)3, its composites with two natural zeolites, and granulation of them for nitrate removal from polluted water

Preparation and characterization of nano- Fe(OH)3, its composites with two natural zeolites, and granulation of them for nitrate removal from polluted water

Mitigation Measures of Swelling Characteristics in Alkali-Contaminated Red Earth using Fly Ash and GGBS Blends

Hierarchized ZSM-5 Zeolite Synthesis using N-Methyldiethanolamine as a Novel Desilicate Agent: Impact on Methanol Adsorption and Resistance Improvement to Coke Poisoning

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Preparation and characterization of nano- Fe(OH)₃, its composites with two natural zeolites, and granulation of them for nitrate removal from polluted water

Preparation and characterization of nano- Fe(OH)₃, its composites with two natural zeolites, and granulation of them for nitrate removal from polluted water