Highly brilliant green removal from wastewater by mesoporous adsorbents: Kinetics, thermodynamics and equilibrium isotherm studies

Aichour, Amina; Zaghouane-Boudiaf, Hassina

doi:10.1016/j.microc.2019.02.040

Cited by 62 publications

(15 citation statements)

References 27 publications

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“…The chemical functional groups of LBF and LBZ by FTIR analysis were illustrated in Figure a,b which had six main functional groups of O–H, CN, CC, C–OH, C–O–C, and C–H. For O–H and CN, they represented the carboxylic acids of cellulose, hemicellulose, lignin, and pectin bonding and nitrile link . CC demonstrated an aromatic ring of lignin and C–OH, illustrating the carbonate ions of lemon peels .…”

Section: Results and Discussionmentioning

confidence: 99%

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Comparative Reactive Blue 4 Dye Removal by Lemon Peel Bead Doping with Iron(III) Oxide-Hydroxide and Zinc Oxide

2022

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The increasing concern of dye contamination in wastewater results in the toxicity of aquatic life and water quality, so wastewater treatment is required to treat the low water quality standard for safety purposes. Lemon peel beads-doped iron(III) oxide-hydroxide (LBF) and lemon peel beads-doped zinc oxide (LBZ) were synthesized and characterized to investigate their crystalline structure, surface morphology, chemical compositions, chemical functional groups, and ζ potentials by X-ray diffraction, field emission scanning electron microscopy and focused ion beam, energy dispersive X-ray spectroscopy, Fourier transform infrared, and zetasizer techniques. Their effects of dose, contact time, temperature, pH, and concentration for reactive blue 4 (RB4) dye removal efficiencies were investigated by batch experiments, and their adsorption isotherms, kinetics, and desorption experiments were also studied. LBF and LBZ demonstrated semicrystalline structures, and their surface morphologies had a spherical shape with coarse surfaces. Five main elements of carbon (C), oxygen (O), calcium (Ca), chlorine (Cl), and sodium (Na) and six main function groups of O–H, CN, CC, C–OH, C–O–C, and C–H were detected in both materials. The results of ζ potential demonstrated that both LBF and LBZ had negative charges on the surface at all pH values, and their surfaces increased more of the negative charge with the addition of the pH value from 2–12. For batch tests, the RB4 dye removal efficiencies of LBF and LBZ were 83.55 and 66.64%, respectively, so LBF demonstrated a higher RB4 dye removal efficiency than LBZ. As a result, the addition of iron(III) oxide-hydroxide helped in improving the material efficiency more than zinc oxide. In addition, both LBF and LBZ could be reused in more than five cycles for RB4 dye removal of more than 41%. The Freundlich model was a good explanation for their adsorption patterns relating to physiochemical adsorption, and a pseudo-second-order kinetic model was a well-fitted model for explaining their adsorption mechanism correlating to the chemisorption process with heterogeneous adsorption. Therefore, LBF was a potential adsorbent to further apply for RB4 dye removal in industrial applications.

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Section: Results and Discussionmentioning

confidence: 99%

“…hemicellulose, lignin, and pectin bonding and nitrile link. 19 C�C demonstrated an aromatic ring of lignin and C−OH, illustrating the carbonate ions of lemon peels. 20 Finally, C−O− C identified sodium alginate of glucosidal linkages, and C−H presented aromatic rings and fibers of lemon peels.…”

Section: Fesem−fib and Edxmentioning

confidence: 99%

Comparative Reactive Blue 4 Dye Removal by Lemon Peel Bead Doping with Iron(III) Oxide-Hydroxide and Zinc Oxide

2022

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“…Nevertheless, most of the adsorbents are expensive, toxic, nonbiodegradable, poor in regeneration capability and selectivity. Therefore, finding a cost effective and biodegradable adsorbent is a relevant area of research (Aichour & Zaghouane-Boudiaf, 2019;Shittu et al, 2019;Soliman, Moustafa, Aboud, & Halim, 2019;Ullah, Sun, Gul, & Bai, 2020). Zeolites are naturally occurring crystalline aluminosilicate mineral with porous structure.…”

Section: Introductionmentioning

confidence: 99%

Removal of Methylene Blue Dye from Aqueous Solution using PDADMAC Modified ZSM-5 Zeolite as a Novel Adsorbent

Radoor

Karayil²,

Jayakumar

et al. 2021

J Polym Environ

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In the present work, we modified ZSM-5 zeolite using a bio polymer poly (diallyl dimethyl ammonium chloride) and employed it for the removal of cationic dye, methylene blue from aqueous solution. The chemical and physical properties of the modified ZSM-5 zeolite were investigated using XRD, FTIR, SEM, TEM, nitrogen adsorption, TGA and 27 Al NMR.Modified ZSM-5 zeolite possesses high surface area and pore diameter which was confirmed from SEM, TEM and nitrogen adsorption analysis. Adsorption of methylene blue on zeolite was investigated by batch adsorption technique. The effect of different parameters such as zeolite dosage, initial methylene blue concentration, temperature, p H and contact time on the adsorption process was discussed. Maximum adsorption capacity (4.31 mg/g) was achieved using 0.1g of modified ZSM-5 zeolite at the optimum conditions (initial dye concentration: 10 mg/L, pH: 10, temperature:30 o C and contact time: 300 min). The experimental data were fitted into Langmuir and Freundlich models and the results indicate that the adsorption process followed Freundlich isotherm. Kinetic data were investigated using pseudo-first-order and pseudo-second-order models. Kinetic analysis indicates that pseudo-second-order model is more suitable to describe adsorption of MB on modified ZSM-5 zeolite. The reusability test suggests that the adsorbent could be reused at least six times without significant loss in removal efficiency.

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“…The obtained maximum content of sorbate in FA-HDTMABr at the sorption equilibrium was 121.5 mg·g -1 (R 2 = 0.676) and 101.5 mg·g -1 (R 2 = 0.625) for Cd(II) and RB, respectively. Temkin isotherm [32,35] contains a factor taking into account the adsorbent-adsorbate interactions. The model describes that adsorption heat as a function of temperature of all molecules in the layer would decrease linearly rather than logarithmically [32].…”

Section: Equilibrium Studiesmentioning

confidence: 99%

“…The model describes that adsorption heat as a function of temperature of all molecules in the layer would decrease linearly rather than logarithmically [32]. The Temkin isotherm fits the gas phase equilibrium well, but this model is not appropriate to be the expressed adsorption process in the liquid systems [35]. From the linear plot of the Temkin model ( Fig.…”

Section: Equilibrium Studiesmentioning

confidence: 99%

Immobilizing and Removal of Cadmium and Rhodamine B from an Aqueous System by Converting Solid Waste from Poland; Studies of Equilibrium and Kinetic Sorption

Sočo¹,

Kalembkiewicz²

2020

Pol. J. Environ. Stud.

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The presented work introduces the chemical modification of coal fly ash (FA) treated with NaOH and hexadecyltrimethylammonium bromide (HDTMABr) used as adsorbent for the removal of cadmium(II) ions and rhodamine B (RB) from aqueous solution. The FTIR spectrum shows the presence of organic and inorganic entities that are also seen on the XRD chart. The SEM analysis shows clearly the surface morphology and roughness of FA-HDTMABr. The effect of pH on adsorption equilibrium was studied. Maximum adsorption was found for pH values of 9. The Cd(II) ions and RB dye sorption is attributed to different mechanisms of the ion-exchange processes as well as to the adsorption. On the basis of reduced chi-square test (χ 2 /DoF) values obtained for both sorbates of the considered isotherms, the fitting degree follows the immediate sequence: Langmuir>Jovanović>Redlich-Peterson>Tóth>Freundl ich>generalized Langmiur-Freundlich>extended Jovanović>Halsey>Temkin>Dubinin-Radushkevich> Fumkin-Fowler-Guggenheim>Fowler-Guggenheim-Jovanović-Freundlich>Brunauer Emmett and Teller. The maximum monolayer adsorption capacity of the FA-HDTMABr was found to be 744 mg·g -1 and 666 mg·g -1 for Cd(II) and RB, respectively. The PFO, PSO, Elovich mass transfer, liquid film diffusion and intra-particle diffusion models were analysed. The PSO model (R 2 = 0.996) was slightly lower for Cd than those of the PFO model (R 2 <0.7), which is an indication that the PSO model was better than the PFO model. Purification water containing direct Cd and RB was made with 94% efficiency after 1 hour. We found that the chemical enhancement of FA from coal combustion by HDTMABr treatment yields an effective and economically feasible material for the treatment of basic dye and Cd(II) ions containing effluents.

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Highly brilliant green removal from wastewater by mesoporous adsorbents: Kinetics, thermodynamics and equilibrium isotherm studies

Cited by 62 publications

References 27 publications

Comparative Reactive Blue 4 Dye Removal by Lemon Peel Bead Doping with Iron(III) Oxide-Hydroxide and Zinc Oxide

Comparative Reactive Blue 4 Dye Removal by Lemon Peel Bead Doping with Iron(III) Oxide-Hydroxide and Zinc Oxide

Removal of Methylene Blue Dye from Aqueous Solution using PDADMAC Modified ZSM-5 Zeolite as a Novel Adsorbent

Immobilizing and Removal of Cadmium and Rhodamine B from an Aqueous System by Converting Solid Waste from Poland; Studies of Equilibrium and Kinetic Sorption

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