Comparison of adsorption behaviors of Fe-La oxides co-loaded MgO nanosheets for the removal of methyl orange and phosphate in single and binary systems

Sun, Xubing; Zhou, Yuanliang; Zheng, Xiaogang

doi:10.1016/j.jece.2020.104252

Cited by 38 publications

(5 citation statements)

References 70 publications

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“…The maximum adsorption capacities ( q max ) calculated by the Langmuir isotherm are 852.2, 834.3, and 764.4 mg/g under 298, 313, and 328 K, respectively, which are higher than those of most of the MO adsorbents reported recently (Table ). − …”

Section: Resultsmentioning

confidence: 99%

Effective Adsorption of Methyl Orange on Organo-Silica Nanoparticles Functionalized by a Multi-Hydroxyl-Containing Gemini Surfactant: A Joint Experimental and Theoretical Study

et al. 2021

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A novel multi-hydroxyl-containing gemini surfactant (G16) is first designed for modifying silica precursors (SiNPs), with the purpose of fabricating organic adsorbents targeted at methyl orange (MO). The purity of G16 and structural character of the resultant G16-SiNPs are unveiled through Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetry-derivative thermogravimetry, scanning electron microscopy, and surface analysis (BET). Compared with SiNPs, G16-SiNPs exhibit enhanced hydrophobicity, enlarged interlayer spacing, and increased thermal weight losses with the modifier availability reaching as high as 100%. Enhanced MO adsorption is obtained from the higher adsorption capacity of G16-SiNPs (401.88 mg/g) than SiNPs (64.72 mg/g), which is more effective than most of the existing silica-based adsorbents. Pseudo-second-order and Langmuir models conform to all adsorption processes, indicating that the adsorption mainly relies on the availability of adsorption sites and characterized by a homogeneous adsorption form. By combining the experimental study and theoretical calculation methods, it can be demonstrated that the as-synthesized adsorbent G16-SiNPs own multi-active sites that contribute to multi-adsorption mechanisms. The partition process, electrostatic interactions, and OH−π interactions are all responsible for the adsorption performance of G16-SiNPs. This study throws light on the exploration of the superb MO adsorbent in aspects of not only the novel structured modifier and precursor but also theoretical analysis for gaining insights into the adsorption mechanism.

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Section: Resultsmentioning

confidence: 99%

Effective Adsorption of Methyl Orange on Organo-Silica Nanoparticles Functionalized by a Multi-Hydroxyl-Containing Gemini Surfactant: A Joint Experimental and Theoretical Study

et al. 2021

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“…Modification of chitosan using ECH and TPP can extend chitosan application in the broad range of pH conditions. It was indicated by the cross-linked chitosan beads' excellent stability at a range of the examined pH (2)(3)(4)(5)(6)(7)(8).…”

Section: Adsorption Of Mo Onto the Cross-linked Chitosan Beadmentioning

confidence: 99%

“…The most popular approaches for dye removal are photocatalytic degradation [ 2 , 3 ] and adsorption [ 4 , 5 ] methods. Although photodegradation methods using nanostructured materials [ 6 ] and nanocomposites [ 7 ] have developed rapidly, however, adsorption method remains in popularity due to its benefit that it can prevent the production of other toxic substances [ 8 – 10 ]. Furthermore, the toxicity of dyes will not affect the adsorption process.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Kinetic Studies of Cross-Linked Chitosan Beads Using Dual Crosslinkers of Tripolyphosphate and Epichlorohydrin for Adsorption of Methyl Orange

Sabarudin

Madjid

2021

The Scientific World Journal

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Preparation of cross-linked chitosan beads using dual crosslinkers of tripolyphosphate (TPP) and epichlorohydrin (ECH) for the adsorption and kinetic studies of methyl orange (MO) had been carried out. FTIR spectra showed that TPP could act as the protecting agent of the NH2 group of chitosan and ECH reacted with the primary hydroxyl group of chitosan. Various concentrations of TPP, ECH, and immersing time in the TPP solution for bead formation were studied. The effect of pH and kinetics of adsorption were investigated to define the mechanism of adsorption and rate-limiting step. As a result, pH 3, 10% (w/v) TPP, 5% (v/v) ECH, and 12 h immersing time in TPP were selected as the optimum conditions for preparing the beads as indicated by the highest adsorption amount of MO. The cross-linked chitosan beads’ adsorption capacity for MO under optimum condition was found to be 79.55 mg/g with the adsorption rate constant (k) of 1.29 × 10−3/min. Furthermore, it was found that a low concentration of ECH could maintain the stability of chitosan in acidic conditions, whereas the concentration of TPP and immersing time controlled pore size and morphology of chitosan beads. The mechanism of adsorption of MO was controlled by the pore and rigidity of cross-linked chitosan beads. Bulk diffusion acted as a rate-limiting step, and a high concentration of MO inhibited diffusion and adsorption itself.

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“…The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request. Maghemite/chitosan of nanocomposite film 29.41 [38] Chitosan/alumina composite 33.00 [39] Fe-La oxides co-loaded MgO (Fe-La/MgO) nanosheets 30.38 [40] Modified wheat straw 3.0 50.40 [41] m Reusability number e ciency of the adsorption of MO on AlgN-CTAB…”

Section: Availability Of Data and Materialsmentioning

confidence: 99%

Dye Anionic Removal From Water by Green Synthesized Nannochloropsis Sp.- Cetyltrimethylammonium Bromide Surfactant: Kinetics, Adsorption Isotherm and Adsorbent Regeneration

Buhani

Miftahza

Suharso

et al. 2021

Preprint

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In this research, biomass modification of Nannochloropsis sp. with surfactant cetyltrimethylammonium bromide (CTAB) through a cation exchange reaction to produce adsorbent Nannochloropsis sp.-cetyltrimethylammonium bromide (AlgN-CTAB). Biomass modification of Nannochloropsis sp. by CTAB has been successfully carried out through confirmation from the analysis data produced by Fourier-transform infrared spectroscopy and scanning electron microscope & energy-dispersive X-ray spectroscopy. AlgN-CTAB adsorbent has been tested for its adsorption ability against anionic dye of methyl orange (MO) in solution by way of a sequence of experiments by the batch method. The optimum conditions for MO removal from the solution occurred at an adsorbent quantity of 0.1 g, pH of 5, and an interaction time of 60 min. MO adsorption kinetics data by AlgN and AlgN-CTAB tended to take the kinetics model of pseudo-second-order (PSO) with PSO rate constant (k2) values of 0.56 and 2.17 g mg-1min-1, serially. The MO adsorption isotherm pattern by AlgN tends to take the Freundlich adsorption isotherm whereas in AlgN-CTAB, it follows the Langmuir and Dubinin-Raduskevich adsorption isotherms (AIML and AIMDR). The results of the adsorption-desorption of MO by AlgN-CTAB with 4 repetition cycles resulted % removal of MO > 80%. The AlgN-CTAB adsorbent can be used repeatedly and is very effective in absorbing MO in solution.

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Comparison of adsorption behaviors of Fe-La oxides co-loaded MgO nanosheets for the removal of methyl orange and phosphate in single and binary systems

Cited by 38 publications

References 70 publications

Effective Adsorption of Methyl Orange on Organo-Silica Nanoparticles Functionalized by a Multi-Hydroxyl-Containing Gemini Surfactant: A Joint Experimental and Theoretical Study

Effective Adsorption of Methyl Orange on Organo-Silica Nanoparticles Functionalized by a Multi-Hydroxyl-Containing Gemini Surfactant: A Joint Experimental and Theoretical Study

Preparation and Kinetic Studies of Cross-Linked Chitosan Beads Using Dual Crosslinkers of Tripolyphosphate and Epichlorohydrin for Adsorption of Methyl Orange

Dye Anionic Removal From Water by Green Synthesized Nannochloropsis Sp.- Cetyltrimethylammonium Bromide Surfactant: Kinetics, Adsorption Isotherm and Adsorbent Regeneration

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