Behaviour of modified hexadecyltrimethylammonium bromide bentonite toward uranium species

Houhoune, F.; Nibou, Djamel; Chegrouche, Salah; Menacer, S.

doi:10.1016/j.jece.2016.07.018

Cited by 29 publications

(11 citation statements)

References 30 publications

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“…[21] This was inferred from the adsorption capacity of 200HDTMA-B which was lower than that of 100HDTMA-B. This result is similar to that found by other authors on the behavior of hexadecyltrimethylammonium bromide-modified Bentonite with respect to uranium [38] and also on the adsorption of aniline on hybrid-Bentonite modified with bispyridinium dibromides. [39] These same authors indicated that the decrease in adsorption capacity with the increase in cationic surfactant loading is due to the steric hindrance caused by the surfactant packing density.…”

Section: Adsorption Kineticssupporting

confidence: 87%

Effect of The Surfactant Loaded Amount Into The Bentonite on The Elimination of Two Anionic Dyes: Adsorption, Kinetics, and Isotherm Studies

Guezzen

Adjdir

Abdelkader

et al. 2021

Preprint

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The present work focused on the preparation of hybrid-bentonite adsorbents by treating sodium bentonite (Na-B) with different amounts of hexadecyltrimethylammonium bromide (HDTMA+ Br-), corresponding to 50, 100 and 200% the value of the cation exchange capacity (CEC). The samples prepared, namely 50HDTMA-B, 100HDTMA and 200HDTMA-B, were characterized by different techniques including Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA ). The removal efficiency of two anionic dyes, namely. Congo Red (CR) and Indigo Carmine (IC), from aqueous solutions, was studied as a function of the amount of HDTMA, contact time, hybrid adsorbent and initial dye concentration. In addition, a kinetic study was conducted to fit the experimental data in order to compare the adsorption rate constants and the equilibrium sorption capacities of anionic dyes on the prepared materials. The results obtained indicated that the adsorption kinetics of clay samples could be best described by the pseudo-second-order model, and the adsorption capacity of the hybrid-Bentonite is affected by the amount of modifier used. Based on Weber-Morris intra-particle diffusion equation, it was found that the CR and IC dyes diffused faster as the cationic surfactant loading increased from 0 to 100% of the CEC value. The Langmuir isotherm exhibited the best fit, with an adsorption capacity equal to 292 and 289 mg g-1, for CR and IC dyes, respectively.

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Section: Adsorption Kineticssupporting

confidence: 87%

Effect of The Surfactant Loaded Amount Into The Bentonite on The Elimination of Two Anionic Dyes: Adsorption, Kinetics, and Isotherm Studies

Guezzen

Adjdir

Abdelkader

et al. 2021

Preprint

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show abstract

“…For all kinds of bentonite, with the exception of H-bentonite, the desorption isotherms differed from the sorption isotherms, which attested to the irreversibility of the entire sorption process. Surface precipitation and surface complexation play important roles in U(VI) immobilization by bentonite [26][27][28].…”

Section: Resultsmentioning

confidence: 99%

A thermal, sorptive and spectral study of HDTMA-bentonite loaded with uranyl phosphate

Sternik

Gładysz–Płaska

Grabias

et al. 2017

J Therm Anal Calorim

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The influence of phosphate ions on the thermal stability of complexes obtained by adsorption of uranium(VI) on organobentonite was determined. Organoclay samples were prepared by the reaction of hexadecyltrimethylammonium bromide with bentonite. The isotherms of sorption/desorption of U(VI) from aqueous solutions containing phosphate ions onto different forms of bentonite were measured using the batch method. The highest amount of uranium was absorbed on HDTMAbentonite in the presence of phosphates. This may have been associated with the complexing of U(VI) ions by phosphate ions, which interacted with surfactant cations probably via electrostatic forces. A TG-DSC-MS study showed that the thermal decomposition of the surfactant sorbed on bentonite proceeded in two stages: at 200-400 and at 600-800°C. The first stage involved defragmentation and oxidation of surfactant cations present in the interior and on the surface of the mineral. The second stage involved oxidation of charcoal and simultaneous dehydroxylation of the sorbent. The oxidation of surfactant cations and the dehydroxylation of the mineral were suppressed in the presence of phosphates.

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“…The separation factor parameter R L was calculated from (Eq. 4) [42] for the determination of the favorability of the adsorption process.…”

Section: Modeling Of Sorption Isothermsmentioning

confidence: 99%

Removal of Methylene Blue and Basic Yellow 28 Dyes from Aqueous Solutions Using Sulphonated Waste Poly Methyl Methacrylate

et al. 2019

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This work focuses on two different environmental problems: the recovery of plastic wastes PMMA (W PMMA) and their application in the removal of textile dyes Methylene Blue (MB) and Basic Yellow 28 (BY28) in aqueous solutions. The selected waste plastic was upgraded to produce an adsorbent suitable for dyes removal. For that, the material was grinded cryogenically up to a particle size of less than 100 μm and treated with sulfuric acid. The sulphonated waste PMMA (SW PMMA) was characterized by FTIR, scanning electronic microscopy (SEM) and chemical composition analysis (C, H, N, O and S content). The formation of sulphonic groups in the material after sulphonation reaction has been successfully demonstrated by FTIR, and can be observed mainly in the region 3087 cm -1 to 3657 cm -1 , where an intense band bound to the stretching of the SO 3 H appeared; another absorption band appeared in the region from 1080 cm -1 to 1271 cm -1 that corresponds to the symmetric stretching of the SO 2 group. The effects of solution pH, initial dyes concentration, adsorbent dose and temperature were studied in batch experiments. The obtained data showed that SW PMMA adsorbent exhibit significant adsorption capacities of 97.09 and 222.

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Behaviour of modified hexadecyltrimethylammonium bromide bentonite toward uranium species

Cited by 29 publications

References 30 publications

Effect of The Surfactant Loaded Amount Into The Bentonite on The Elimination of Two Anionic Dyes: Adsorption, Kinetics, and Isotherm Studies

Effect of The Surfactant Loaded Amount Into The Bentonite on The Elimination of Two Anionic Dyes: Adsorption, Kinetics, and Isotherm Studies

A thermal, sorptive and spectral study of HDTMA-bentonite loaded with uranyl phosphate

Removal of Methylene Blue and Basic Yellow 28 Dyes from Aqueous Solutions Using Sulphonated Waste Poly Methyl Methacrylate

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