Characterization and application of MgAl layered double hydroxide for methyl orange removal from aqueous solution

Zaghloul, Ahmed; Benhiti, Ridouan; Ichou, Abdeljalil Ait; Cârjă, Gabriela; Soudani, Amina; Zerbet, Mohamed; Sinan, Fouad; Chiban, Mohamed

doi:10.1016/j.matpr.2020.07.676

Cited by 27 publications

(14 citation statements)

References 25 publications

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“…According to the structure and composition of LDHs, it was speculated that this absorption peak may be caused by the O-H groups in interlayer H2O molecules, and that this conjecture was consistent with the absorption peak of crystalline H2O between 1670~1600 cm −1 . By comparison, it can be found that the absorption peak at 1350 cm −1 in PTB-LDHs was greatly weakened in PTB-LDOs after calcination, considering that this absorption peak was caused by the vibration of CO3 2− and NO3 − anions intercalated between layers [28]. After calcination, the interlayer anions of hydrotalcite disappeared, resulting in the insertion site of fluoride ions.…”

Section: Ftir Analysismentioning

confidence: 95%

Removal of Fluoride from Phosphogypsum Leaching Solution with Phosphate Tailing Based Layered Double Hydroxides: Kinetics and Equilibrium Isotherms

Liu

Zhang

Xiao³

et al. 2022

Minerals

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In this work, ternary and quaternary layered double oxides (PTB-LDO3 and PTB-LDO4) based on phosphate tailings were synthesized by the coprecipitation method. The as-prepared samples were characterized and applied to remove fluorine ions from a phosphogypsum leaching solution. The results indicated that both the precursor of PTB-LDO3 and PTB-LDO4 showed a layered structure with characteristic diffraction peaks of hydrotalcite. Compared with PTB-LDO4, PTB-LDO3 exhibited better adsorption performance at pH 5–6 and a dosage of 0.04 mg L−1. The adsorption kinetics results revealed that the adsorption of fluorine by PTB-LDO3 and PTB-LDO4 reached the adsorption equilibrium in about 3 h, and followed the pseudo-second-order model. The adsorption data could be fitted better with the Langmuir isotherm with the maximum adsorption amounts of 26.03 mg g−1 and 15.66 mg g−1 for PTB-LDO3 and PTB-LDO4, respectively. The adsorption of fluorine by PTB-LDO3 and PTB-LDO4 were both spontaneous and exothermic, and exhibited excellent reusability and stability. This study provides a possibility for the combined treatment of phosphorus chemical solid waste (phosphorus tailings) and phosphorus chemical wastewater (phosphogypsum leaching liquid).

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Section: Ftir Analysismentioning

confidence: 95%

Removal of Fluoride from Phosphogypsum Leaching Solution with Phosphate Tailing Based Layered Double Hydroxides: Kinetics and Equilibrium Isotherms

Liu

Zhang

Xiao³

et al. 2022

Minerals

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“…18 In comparison to neutral dyes, ionic dyes have a higher capture efficiency via non-covalent interactions (electrostatic, H-bonding, and so on) when utilizing the physical adsorption technique. 3,19 Thus, various adsorption materials have been explored to remove those ionic dyes from wastewater, such as LDH (layered double hydroxide), 20,21 nanocomposite, 22,23 hydrogel, 24,25 zeolite, 26 activated carbon, 27 and so on. 28,29 However, some key limitations in their performances, such as limited adsorption capacities, poor regeneration, and a long capture time, have pushed them behind the competition.…”

Section: Introductionmentioning

confidence: 99%

3D Metallo-Supramolecular Polymer for Fast and Efficient Removal of Anionic Dyes from Water

Jena

Mandal

Choudhury

2022

ACS Appl. Polym. Mater.

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Toxic dye contaminants in wastewater are of severe concern to human and aquatic ecosystems. Consequently, proper treatment and control of these effluents are of utmost urgency. Despite the advancement of various classes of materials, such as metal−organic frameworks, covalent organic frameworks, porous organic polymers, and poly(ionic liquids), challenges such as low capture capacity, high capturing time, non-reusability, poor selectivity, and pH-limited performance still remain to be addressed. Therefore, developing a potential class of materials to address such challenges is desirable. Herein, a [Zn(terpyridine) 2 ] 2+ -templated tris-imidazolium based highly cationic three-dimensional (3D) metallo-supramolecular polymer (MSP) ({Zn 1.5 L1} n ) was synthesized and utilized for the selective adsorption of anionic dyes [methyl orange (MO), acid orange-7 (AO-7), alizarin red S (AR), Congo red (CR), and eriochrome black T (EBT)]. The role of geometry, cationic framework, and counter anions present at the imidazolium unit and the metal center (Cl − ) were investigated by comparing the capture capacity with two other MSPs {Zn 1.5 L2} n and {Zn 1.5 L3} n , which were designed by altering the ligand backbone in a controlled manner. {Zn 1.5 L1} n exhibited comparatively high efficiency out of the three MSPs and the capture capacity for MO, AO-7, AR, CR, and EBT were 966, 1116, 1002, 908, and 800 mg/g, respectively. The pseudo-second-order model and the Langmuir model suit all adsorption kinetics data and isotherms well. Further, for {Zn 1.5 L1} n , the adsorption in the presence of different competing anions at different pH (2−12) and a glass column setup experiment was carried out. The reusability of the polymer up to 10 cycles for MO and AO-7 was also demonstrated. Finally, the adsorption mechanism was established by treating the material with different cationic and neutral dyes. The selective capture toward anionic dyes revealed that ion exchange and electrostatic interactions dominated the adsorption process.

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“…Dye wastewater pollution seriously affects the balance of the ecosystem and natural environment [15][16][17]. The most typical dye in wastewater is methyl orange (MO) (Figure S1b) [16,[18][19][20][21]. Therefore, it is urgent to find green and clean technologies to solve the energy crisis and water pollution problems.…”

Section: Introductionmentioning

confidence: 99%

Flower-Like Dual-Defective Z-Scheme Heterojunction g-C3N4/ZnIn2S4 High-Efficiency Photocatalytic Hydrogen Evolution and Degradation of Mixed Pollutants

Hou

Jin

et al. 2021

Nanomaterials

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Graphitic carbon nitride (g-C3N4) with a porous nano-structure, nitrogen vacancies, and oxygen-doping was prepared by the calcination method. Then, it was combined with ZnIn2S4 nanosheets containing zinc vacancies to construct a three-dimensional (3D) flower-like Z-scheme heterojunction (pCN-N/ZIS-Z), which was used for photocatalytic hydrogen evolution and the degradation of mixed pollutants. The constructed Z-scheme heterojunction improved the efficiency of photogenerated charges separation and migration, and the large surface area and porous characteristics provided more active sites. Doping and defect engineering can change the bandgap structure to improve the utilization of visible light, and can also capture photogenerated electrons to inhibit recombination, so as to promote the use of photogenerated electron-hole pairs in the photocatalytic redox process. Heterojunction and defect engineering synergized to form a continuous and efficient conductive operation framework, which achieves the hydrogen production of pCN-N/ZIS-Z (9189.8 µmol·h−1·g−1) at 58.9 times that of g-C3N4 (155.9 µmol·h−1·g−1), and the degradation rates of methyl orange and metronidazole in the mixed solution were 98.7% and 92.5%, respectively. Our research provides potential ideas for constructing a green and environmentally friendly Z-scheme heterojunction catalyst based on defect engineering to address the energy crisis and environmental restoration.

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Characterization and application of MgAl layered double hydroxide for methyl orange removal from aqueous solution

Cited by 27 publications

References 25 publications

Removal of Fluoride from Phosphogypsum Leaching Solution with Phosphate Tailing Based Layered Double Hydroxides: Kinetics and Equilibrium Isotherms

Removal of Fluoride from Phosphogypsum Leaching Solution with Phosphate Tailing Based Layered Double Hydroxides: Kinetics and Equilibrium Isotherms

3D Metallo-Supramolecular Polymer for Fast and Efficient Removal of Anionic Dyes from Water

Flower-Like Dual-Defective Z-Scheme Heterojunction g-C3N4/ZnIn2S4 High-Efficiency Photocatalytic Hydrogen Evolution and Degradation of Mixed Pollutants

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