Enhancement of Congo red dye removal efficiency using Mg-Fe-layered double hydroxide

Tabti, Hadja Alia; Medjahed, Baghdad; Boudinar, Mohamed; Kadeche, Abdelkader; Bouchikhi, Noria; Ramdani, Amina; Taleb, Safia; Adjdir, Mehdi

doi:10.1007/s11164-022-04722-9

Cited by 13 publications

(3 citation statements)

References 73 publications

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“…This is because as temperature went up, the molecular thermal motion significantly accelerated, and the collision probability of dye molecules and active adsorptive sites increased. The positive ΔS° and the negative ΔG° of CR‐MMFO@LDH system in the adsorption process demonstrated that the adsorption of CR was spontaneous in the ambient environment [40] …”

Section: Resultsmentioning

confidence: 94%

“…The positive ΔS°and the negative ΔG°of CR-MMFO@LDH system in the adsorption process demonstrated that the adsorption of CR was spontaneous in the ambient environment. [40] FTIR comparison of unused MMFO@LDH and after adsorbing CR, Zeta potential change as well as the influence of pH on adsorption quantity were investigated to further reveal the sorption behaviors of MMFO@LDH-CR system. As shown in Figure 4a, the small bands at 1120 cm À 1 , 1180 cm À 1 and 1215 cm À 1 were ascribed to the CÀ H stretching mode of CR, and the vibrational bands located at 1065 cm À 1 was due to the characteristic S=O asymmetric stretching mode of SO 3 À in CR.…”

Section: Adsorption Mechanisms Of Cr From Solutionmentioning

confidence: 99%

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Hierarchically Porous and Magnetic MgFe₂O₄@MgAl‐LDHs Microspheres Synthesized by a Bio‐Templating Strategy for Efficient Removal of Congo Red from Water**

Luo

Han

et al. 2023

ChemistrySelect

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LDHs (Layered double hydroxides) has broad application prospects as adsorbent. Herein, a facile bio‐template route was developed using pine pollens to fabricate a novel 3D hierarchical MgFe2O4@MgAl‐LDHs adsorbent for rapid removal of organic pollutant from water. The agglomeration of the LDH sheets was prevented and evenly distributed over the surface of MgFe2O4 which resulting in large surface area (108.660 m2 g−1). The adsorption and regeneration of the adsorbent were examined. The as‐prepared MgFe2O4@MgAl‐LDHs exhibited excellent adsorption capacity (191.20 mg g−1) for Congo Red and still remained 81.61 % (156.03 mg g−1) of the first time after regenerated 3 times with methanol. Additionally, it could be conveniently recycled via an external magnetic field. The high adsorption capacity, easy recycling, and the low‐cost and readily available biomass made MgFe2O4@MgAl‐LDHs attractive for water remediation.

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Section: Resultsmentioning

confidence: 94%

Section: Adsorption Mechanisms Of Cr From Solutionmentioning

confidence: 99%

Hierarchically Porous and Magnetic MgFe₂O₄@MgAl‐LDHs Microspheres Synthesized by a Bio‐Templating Strategy for Efficient Removal of Congo Red from Water**

Luo

Han

et al. 2023

ChemistrySelect

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“…Langmuir isotherm is a homogeneous surface with identical active sites [58]. Freundlich isotherm represents the multilayer adsorption process on heterogenous adsorbent surface by Van der Waals forces [59]. Langmuir and Freundlich isotherms are expressed in the linear equations ( 5) and ( 6)…”

Section: Langmuir and Freundlich Isothermsmentioning

confidence: 99%

Enhanced fluoride adsorption and regeneration efficiency of cross-linker-free mesoporous hydroxyapatite/chitosan nanocomposites

et al. 2022

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The presence of F − ions in water is either a helpful or harmful outcome, contingent upon the concentration level of the pollutant. In this work, hydroxyapatite/chitosan (HAp/CS) nanocomposites were prepared incorporating varying weight percentages of chitosan with HAp, using co-precipitation followed by lyophilization without employing any cross-linking agents for adsorption of F − ions. Increase in the concentration of chitosan with HAp matrix signi cantly enhanced the colloidal stability, F − ions adsorption capacity and reduced the particle size (length 38% and width 86%) compared to HAp. The maximum F − adsorption capacity of HAp/CS1, HAp/CS2, and HAp/CS4 nanocomposites are 56 mg/g, 80 mg/g and 100 mg/g at pH 7, which was considerably higher (10 times) than HAp when compared to other existing reports. The adsorption isotherm and kinetics of HAp and HAp/CS nanocomposite adsorbent con rm the monolayer and strong chemisorption. After adsorption of F − ions, the surface morphology of adsorbent changed from rod to sphere along with an increase in particle size, as con rmed by HR-TEM. Moreover, FTIR and XPS analysis revealed the surface interaction between adsorbent and F − ions through ion exchange and electrostatic interaction, which lead to formation of uorapatite. HAp/CS4 showed 2.5 times higher sustainable regeneration e ciency (90% in 30 mins) up to 7th cycle than HAp. Furthermore, the solution pH (5-7) of treated water was maintained at neutral after uoride adsorption, making the water potable. Hence, these results demonstrate that chitosan plays a major role in removal of F − ion and this composite is ideal for F − adsorption application. Highlights 1. First report on the synthesis and Fadsorption by the cross-linker-free mesoporous lyophilized HAp/chitosan nanocomposites 2. The HAp/CS4 exhibited signi cantly higher Fadsorption capacity (60%-98%) than the existing reports 3. Higher and sustained regeneration e ciency (90% up to7 th cycle) 4. Enhanced colloidal stability and along with signi cant reduction in the particle size (38% length and 86% width) with an increased chitosan incorporation.

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Adsorption isotherm and kinetic modeling of malachite green (MG) dye on cost-effective mesoporous material Al-MCM-41 synthesized from local clay

Boudinar,

Draoua,

Tabti

et al. 2024

Reac Kinet Mech Cat

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Enhancement of Congo red dye removal efficiency using Mg-Fe-layered double hydroxide

Cited by 13 publications

References 73 publications

Hierarchically Porous and Magnetic MgFe₂O₄@MgAl‐LDHs Microspheres Synthesized by a Bio‐Templating Strategy for Efficient Removal of Congo Red from Water**

Hierarchically Porous and Magnetic MgFe₂O₄@MgAl‐LDHs Microspheres Synthesized by a Bio‐Templating Strategy for Efficient Removal of Congo Red from Water**

Enhanced fluoride adsorption and regeneration efficiency of cross-linker-free mesoporous hydroxyapatite/chitosan nanocomposites

Adsorption isotherm and kinetic modeling of malachite green (MG) dye on cost-effective mesoporous material Al-MCM-41 synthesized from local clay

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Enhancement of Congo red dye removal efficiency using Mg-Fe-layered double hydroxide

Cited by 13 publications

References 73 publications

Hierarchically Porous and Magnetic MgFe2O4@MgAl‐LDHs Microspheres Synthesized by a Bio‐Templating Strategy for Efficient Removal of Congo Red from Water**

Hierarchically Porous and Magnetic MgFe2O4@MgAl‐LDHs Microspheres Synthesized by a Bio‐Templating Strategy for Efficient Removal of Congo Red from Water**

Enhanced fluoride adsorption and regeneration efficiency of cross-linker-free mesoporous hydroxyapatite/chitosan nanocomposites

Adsorption isotherm and kinetic modeling of malachite green (MG) dye on cost-effective mesoporous material Al-MCM-41 synthesized from local clay

Contact Info

Product

Resources

About

Hierarchically Porous and Magnetic MgFe₂O₄@MgAl‐LDHs Microspheres Synthesized by a Bio‐Templating Strategy for Efficient Removal of Congo Red from Water**

Hierarchically Porous and Magnetic MgFe₂O₄@MgAl‐LDHs Microspheres Synthesized by a Bio‐Templating Strategy for Efficient Removal of Congo Red from Water**