Optimize the preparation of Fe3O4-modified magnetic mesoporous biochar and its removal of methyl orange in wastewater

Wang, Jinpeng; Chen, Wenyuan; Zhang, Ming; Zhou, Runjuan; Li, Jiyuan; Zhao, Wei; Wang, Lixian

doi:10.1007/s10661-021-08971-w

Cited by 29 publications

(5 citation statements)

References 57 publications

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“…Furthermore, earlier research has revealed that the most optimal conditions for adsorption are those in which the adsorbent's pore width is either 1.2 or 1.7 times the adsorbate's widest [ 60 ]. The MO and IC longitudinal length are about 1.5 nm and 0.9 nm [ 61 , 62 ], respectively, which is less than the pore diameter of Ti (10 %)@ZnO, which is 14.79 nm as depicted from BET results, showing that Ti (10 %)@ZnO can adsorb MO and IC dyes via the pore filling mechanism. The suggested adsorption mechanism of the MO and IC onto the Ti (10 %)@ZnO nanocomposites involves electrostatic attractions, hydrogen bonds, and pore diffusion ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of TiO2@ZnO nanoparticles for enhanced removal of methyl orange and indigo carmine dyes: Adsorption, kinetics

Ben Aissa,

Khairy,

Khalifa

et al. 2024

Heliyon

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Section: Resultsmentioning

confidence: 99%

Facile synthesis of TiO2@ZnO nanoparticles for enhanced removal of methyl orange and indigo carmine dyes: Adsorption, kinetics

Ben Aissa,

Khairy,

Khalifa

et al. 2024

Heliyon

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“…Considering the chemical structures of the dyes (see Table ), the IC molecule contains two −SO 3 – groups, whereas MO has only one, which results in preferential adsorption of IC. In addition, IC contains secondary amine groups, which facilitate other interactions with the nanoadsorbent surfaces (i.e., hydrogen-bonding interactions). , In contrast, since the MO molecule contains a tertiary amine group, it is present as the protonated form at pH ∼2 (pK a = 3.46), which hinders adsorption . For the adsorption of cationic dyes (i.e., MB and RhB), the opposite mechanism can be proposed.…”

Section: Results and Discussionmentioning

confidence: 99%

“…61,62 In contrast, since the MO molecule contains a tertiary amine group, it is present as the protonated form at pH ∼2 (pK a = 3.46), which hinders adsorption. 63 For the adsorption of cationic dyes (i.e., MB and RhB), the opposite mechanism can be proposed. In addition, the PCysMA-modified nanoadsorbents preferentially adsorbed MB rather than RhB at pH ∼10.…”

Section: Ph-selective Adsorption Of Dyesmentioning

confidence: 99%

Magnesium Ferrite/Poly(cysteine methacrylate) Nanocomposites for pH-Tunable Selective Removal and Enhanced Adsorption of Indigo Carmine and Methylene Blue

Kunakham

Hoijang

Nguyen

et al. 2022

Ind. Eng. Chem. Res.

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Magnesium ferrite (MgFe 2 O 4 ) and silica-coated MgFe 2 O 4 nanoparticles were grafted with poly(cysteine methacrylate) (i.e., MgFe 2 O 4 /PCysMA and MgFe 2 O 4 @SiO 2 /PCysMA nanocomposites) to study pH-tunable adsorption and enhanced capacities for the adsorption of anionic indigo carmine (IC) and cationic methylene blue (MB) dyes. Several characterization techniques (i.e., XRD, FTIR, TGA, ζ potential analysis, VSM, FE-SEM, TEM, N 2 adsorption−desorption isotherm, and XPS) indicated successful syntheses of these nanocomposites. The adsorption behaviors of the dyes demonstrated that the PCysMA-modified nanoadsorbents could selectively adsorb either IC or MB from either single-component or binary dye systems if the initial pH of the dye solution was tailored appropriately (i.e., pH ∼2 for IC and pH ∼10 for MB). The selective adsorption of these dyes was proposed by the electrostatic attractions of the nanoadsorbents and the dyes. Adsorption isotherms also showed enhanced capacities of MgFe 2 O 4 and MgFe 2 O 4 @SiO 2 NPs for the adsorption of IC and MB after grafting with PCysMA. Interestingly, the MgFe 2 O 4 @SiO 2 /PCysMA nanoadsorbent provided highly pH-selective adsorption and large increases in the capacities for the adsorption of IC and MB, which were attributed to the amounts of PCysMA grafted onto different magnetic substrates. The coating of silica on the surfaces of magnetic nanoparticles provided a higher amount of 3-methacryloxypropyltrimethoxysilane, promoting the polymerization of CysMA monomer. Recycling tests indicated that high efficiencies (∼80%) for the adsorption of IC and MB by the PCysMA-modified nanoadsorbents were obtained after five adsorption−desorption cycles. These key findings showed that the MgFe 2 O 4 /PCysMA and MgFe 2 O 4 @SiO 2 /PCysMA nanocomposites exhibited excellent pH-tunable adsorption of anionic and cationic dyes, easy magnetic separation, good reusability, and high stability. Specifically, the MgFe 2 O 4 @SiO 2 /PCysMA nanocomposite offers highly pH-selective adsorption and high adsorption capacities for dyes, demonstrating promising and alternative nanoadsorbents for applications in wastewater treatment and sensors.

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“…After the biochar prepared by Du et al [46] was modified by Fe 3 O 4 , its specific surface area increased from 117.595 to 145.963 m 2 •g −1 , and its pore volume increased from 0.05256 to 0.06549 cm 3 •g −1 . After the rice husk biochar prepared by Zhang et al [47] was modified with Fe 3 O 4 , its specific surface area and pore volume increased by 99.88 m 2 •g −1 and 0.238 cm 3 •g −1 , respectively; for the Fe 3 O 4 modified biochar prepared by Wang et al [48], when the Fe 2+ concentration increased to 0.4 mol•L −1 , the specific surface area of the biochar increased significantly from 1.856 to 16.223 m 2 •g −1 , and the pore volume increased from 0.011 to 0.064 cm 3 •g −1 . The increases in specific surface area, pore volume, and pore size of the Fe 3 O 4 modified biochar prepared in the above study are similar to this experimental study.…”

Section: Characterization Of Cs-fe3o4-b600mentioning

confidence: 99%

Adsorption Performance of Cd(II) by Chitosan-Fe3O4-Modified Fish Bone Char

Yang

Luo

Sun

et al. 2022

IJERPH

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In order to develop a low-cost, fast, and efficient adsorbent, the fish bone charcoal B600 prepared at 600 °C was modified by chitosan (Cs) and Fe3O4 to produce the material Cs-Fe3O4-B600. Results showed that Cs-Fe3O4-B600 had magnetic responsiveness and can achieve solid–liquid separation, macropores disappeared, pore volume and specific surface area are increased, and amino functional groups appear on the surface. The adsorption process of Cd(II) by Cs-Fe3O4-B600 conformed best to the pseudo-second order kinetics model and the Langmuir model, respectively. The behavior over a whole range of adsorption was consistent with chemical adsorption being the rate-controlling step, which is a very fast adsorption process, and the isothermal adsorption is mainly monolayer adsorption, which belongs to favorable adsorption. In addition, the saturated adsorption capacity obtained for the Cs-Fe3O4-B600 to Cd(II) was 64.31 mg·g−1, which was 1.7 times than B600. The structure and morphology of Cs-Fe3O4-B600 were characterized through SEM-EDS, TEM, FTIR, and XRD, indicating that the main mechanism of Cs-Fe3O4-B600 and Cd(II) is mainly the complexation of amino groups, and it also includes part of the ion exchange between Cd(II) and Fe3O4. Therefore, Cs-Fe3O4-B600 can be employed as an effective agent for remediation of Cd contaminated water.

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Optimize the preparation of Fe3O4-modified magnetic mesoporous biochar and its removal of methyl orange in wastewater

Cited by 29 publications

References 57 publications

Facile synthesis of TiO2@ZnO nanoparticles for enhanced removal of methyl orange and indigo carmine dyes: Adsorption, kinetics

Facile synthesis of TiO2@ZnO nanoparticles for enhanced removal of methyl orange and indigo carmine dyes: Adsorption, kinetics

Magnesium Ferrite/Poly(cysteine methacrylate) Nanocomposites for pH-Tunable Selective Removal and Enhanced Adsorption of Indigo Carmine and Methylene Blue

Adsorption Performance of Cd(II) by Chitosan-Fe3O4-Modified Fish Bone Char

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