A novel adsorbent of bentonite modified chitosan-microcrystalline cellulose aerogel prepared by bidirectional regeneration strategy for Pb(II) removal

Yan, Chen; Nie, Zeguang; Gao, Junkai; Wang, Jiaqi; Cai, Miaomiao

doi:10.1016/j.jece.2021.105755

Cited by 35 publications

(16 citation statements)

References 59 publications

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“…3C). 21,35 The spectrum of C/ZD shows some bands related to the organic structure of cellulose as the -CH bearing functional groups (2902 and 1381 cm −1 ) and other bands related to the silicate structure of zeolite (Si-O-Al (563 cm −1 ), Si-O (670 cm −1 ), Si-O-Si (1012 cm −1 ), zeolitic water (1433 cm −1 ), and Al-OH (3407 cm −1 )) (Fig. 3D).…”

Section: Characterization Of the Used Adsorbentsmentioning

confidence: 99%

“…18,19 However, the development of suitable adsorbent materials is still an attractive research point considering the essential qualication criteria such as availability of material, production cost, recyclability, adsorption capacity, kinetic rates, and equilibrium behaviors. 7,20,21 The adsorption of metals using natural raw materials and their modied forms and composites represents the most effective decontamination technique according to availability, cost, escalation, and environmental considerations. 6,22 Natural and synthetic nano-porous silicate and silica-based materials were extensively inspected as promising adsorbent structures that are characterized by signicant surface area, adsorption capacity, and highly porous properties.…”

Section: Introductionmentioning

confidence: 99%

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Insight into the synergetic, steric and energetic properties of zeolitization and cellulose fiber functionalization of diatomite during the adsorption of Cd(ii): advanced equilibrium studies

et al. 2023

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Section: Characterization Of the Used Adsorbentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Insight into the synergetic, steric and energetic properties of zeolitization and cellulose fiber functionalization of diatomite during the adsorption of Cd(ii): advanced equilibrium studies

et al. 2023

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“…As a result, the positively charged MG species are electrostatically captured in significant quantities. 43,48,49 2.2.2. Kinetic Assessment.…”

Section: Adsorption Results 221 Influence Of Phmentioning

confidence: 99%

Synthesis and Characterization of Iron-Rich Glauconite Nanorods by a Facile Sonochemical Method for Instantaneous and Eco-friendly Elimination of Malachite Green Dye from Aquatic Environments

Allah,

Abdel-Khalek,

El-Sherbeeny

et al. 2023

ACS Omega

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Novel glauconite nanorods (GNRs) were synthesized by the sonication-induced chemical expansion and scrolling process of natural glauconite. The synthetic nanostructure was characterized by different analytical techniques as a superior adsorbent for the malachite green dye (MG). The synthetic GNRs were detected as porous nanorods with an average length of 150 nm to 5 μm, an average diameter of 25 to 200 nm, and a specific surface area of 123.7 m 2 /g. As an adsorbent for MG, the synthetic GNRs showed superior uptake capacity up to 1265.6 mg/g at the saturation stage, which is higher than most of the recently developed highly adsorbent dyes. The adsorption behavior and mechanistic properties were depicted by using modern and traditional equilibrium modeling. The kinetic assumption of the pseudo-first-order model ( R 2 > 0.94) and the classic isotherm of the Langmuir equilibrium model ( R 2 > 0.97) were used to describe the adsorption reactions. The steric investigation demonstrates that each active site on the surface of GNRs can adsorb up to three MG molecules ( n = 2.19–2.48) in vertical orientation involving multimolecular mechanisms. Also, the determined active site density (577.89 mg/g) demonstrates the enrichment of the surface of GNRs with numerous adsorption receptors with strong affinity for the MG dye. The energetic study, including Gaussian energy (6.27–7.97 kJ/mol) and adsorption energy (9.45–10.43 kJ/mol), revealed that GNRs had physically adsorbed the dye, which might involve electrostatic attraction, hydrogen bonding, van der Waals forces, and dipole forces. The internal energy, enthalpy, and entropy determined the exothermic and spontaneous uptake of MG.

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“…In Figure 6, the O 1s spectra of Ni-TiO 2 /bentonite and Ni-Tibentonite were divided into three peaks and denoted as O α , O β , and O γ . The O α peak (532.6 ~532.8 eV) can be attributed to Si-O [37] and surface adsorbed water. [38] The O β peak (531.8 532.0 eV) is due to hydroxyls [38][39] and low surface defect sites, such as oxygen vacancies.…”

Section: N 2 -Adsorption Desorption Analysismentioning

confidence: 99%

Ni‐Ti Intercalated and Supported Bentonite for Selective Hydrogenation of Cinnamaldehyde

Luo

et al. 2023

ChemPhysChem

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Ni-Ti intercalated bentonite catalysts (Ni-Ti-bentonite) and Ni-TiO 2 supported bentonite catalysts (Ni-TiO 2 /bentonite) were prepared, and the effects of Ni-Ti supported and intercalated bentonite on the selective hydrogenation of cinnamaldehyde were investigated. Ni-Ti intercalated bentonite enhanced the Brønsted acid sites strength, decreased the acid amount and Lewis's acid sites strength, which inhibited the activation of the C=O bond and contributed to selective hydrogenation of the C=C bond. When Ni-TiO 2 was supported on bentonite, the acid amount and Lewis's acid strength of the catalyst increased, providing additional adsorption sites and increased the acetals byproducts. Due to the higher surface area, mesoporous volume, and suitable acidity, compared with Ni-TiO 2 /bentonite in methanol solvent, 2 MPa, 120 °C for 1 h, Ni-Ti-bentonite exhibited a higher cinnamaldehyde (CAL) conversion of 98.8 %, as well as a higher hydrocinnamaldehyde (HCAL) selectivity of 95 %, and no acetals were found in the product.

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A novel adsorbent of bentonite modified chitosan-microcrystalline cellulose aerogel prepared by bidirectional regeneration strategy for Pb(II) removal

Cited by 35 publications

References 59 publications

Insight into the synergetic, steric and energetic properties of zeolitization and cellulose fiber functionalization of diatomite during the adsorption of Cd(ii): advanced equilibrium studies

Insight into the synergetic, steric and energetic properties of zeolitization and cellulose fiber functionalization of diatomite during the adsorption of Cd(ii): advanced equilibrium studies

Synthesis and Characterization of Iron-Rich Glauconite Nanorods by a Facile Sonochemical Method for Instantaneous and Eco-friendly Elimination of Malachite Green Dye from Aquatic Environments

Ni‐Ti Intercalated and Supported Bentonite for Selective Hydrogenation of Cinnamaldehyde

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