Robust and lightweight biofoam based on cellulose nanofibrils for high-efficient methylene blue adsorption

Lu, Beili; Lin, Qiang; Zhu, Yin; Lin, Fengcai; Chen, Xuerong; Huang, Biao

doi:10.1007/s10570-020-03553-4

Cited by 18 publications

(4 citation statements)

References 73 publications

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“…It was noted that the N-C-N asymmetric stretching at 1453 cm -1 was observed in the NCBA bead. It was also confirmed that the PEI (amino-functionalization) was successfully grafted onto the surface of CNF-Alum@CS [36].…”

Section: Ftir Analysismentioning

confidence: 62%

Nanocellulose/chitosan biohybrid aerogel bead adsorbent for removal of diclofenac sodium from wastewater: preparation, characterization, and adsorption mechanism

Tang

Qiu

Zhang

et al. 2022

Preprint

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In this work, a novel nanocellulose/chitosan biohybrid aerogel (NCBA) bead adsorbent was successfully prepared from oxidized bamboo nanocellulose and chitosan to remove diclofenac sodium (DS) from wastewater. Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy were used to characterize the preparation of NCBA bead adsorbent. The results demonstrated that the adsorption kinetics were well described by the pseudo-second-order model, and the adsorption isotherms were well fitted by the Sips isotherm model with the maximum adsorption capacity of 321.26 mg/g on DS, which is much higher than most of the previously reported works. The absorption mechanism was governed by electrostatic interaction and hydrogen bond interaction. Moreover, the resulting bead remained a high removal efficiency after 5 regeneration cycles. In summary, it had been proved that the aerogel bead was an efficient bio-sorbent for removing DS from aqueous solutions.

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Section: Ftir Analysismentioning

confidence: 62%

Nanocellulose/chitosan biohybrid aerogel bead adsorbent for removal of diclofenac sodium from wastewater: preparation, characterization, and adsorption mechanism

Tang

Qiu

Zhang

et al. 2022

Preprint

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“…Nonetheless, when the pH > 9, the q e almost did not increase with the increase of the pH. When in acidic solution, excessive H + ions on the surface of the F-C-G compete with the MB molecules, and there would be electrostatic repulsion between the positively charged and cationic dye MB molecules on the surface of adsorbent, resulting in reduced adsorption capacity [ 46 ]. When in an alkaline solution, H + ions on the surface of the F-C-G would dissociate into an aqueous solution, making the surface of the material negatively charged, thus enhancing the adsorption capacity under the action of electrostatic attraction.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Methylene Blue from Aqueous Solution Using Gelatin-Based Carboxylic Acid-Functionalized Carbon Nanotubes@Metal–Organic Framework Composite Beads

Zhang

Wang

et al. 2022

Nanomaterials

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A novel gelatin-based functionalized carbon nanotubes@metal–organic framework (F-CNTs@MOF@Gel) adsorbent was prepared by the green and simple method for the adsorption of methylene blue (MB). Cu-BTC (also known as HKUST-1) was selected as the MOF type. F-CNTs@Cu-BTC particles were fixed by gelatin, thus avoiding the secondary pollution of carbon nanomaterial particles to the environment. CNTs were used as the connecting skeleton to make more effective adsorption sites exposed on the surface of the internal pore structure of the adsorbent. In this paper, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (XRD), thermogravimetry (TGA) and BET analysis methods were used to characterize the new adsorbent. The effects of time, temperature, pH, dosage and initial concentration on the adsorption process were investigated by batch adsorption experiments. The adsorption mechanism was further analyzed by several commonly used kinetic and isotherm models, and the reliability of several fitting models was evaluated by the Akaike information criterion (AIC), Bayesian information criterion (BIC) and Hannan information criterion (HIC). After five regeneration experiments, the adsorbent still had 61.23% adsorption capacity. In general, the new adsorbent studied in this paper has an optimistic application prospect.

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“…This indicates that the magnetic bentonite was successfully prepared. The 2θ peaks at 14.13 • , 22.6 • , and 34.32 • are the characteristic peaks of cellulose I β crystal planes 101, 200, and 040, respectively [45]. In contrast to the crystalline peaks of TOCN-PEI, two distinctive peaks appear for the composite PNMBC at 19.8 • and 21.9 • , which indicate that part of the cellulose type I was transformed into cellulose type II during the preparation of the composite [46,47].…”

Section: Xrd Analysismentioning

confidence: 99%

Fabrication of Polyethyleneimine-Modified Nanocellulose/Magnetic Bentonite Composite as a Functional Biosorbent for Efficient Removal of Cu(Ⅱ)

Sun

Han

et al. 2022

Water

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A novel inorganic–organic biosorbent, polyethyleneimine (PEI)-modified nanocellulose cross-linked with magnetic bentonite, was prepared for the removal of Cu(Ⅱ) from water. Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) showed that the amino and carboxyl groups were successfully grafted onto the nanocellulose structure. The adsorption performance of Cu(Ⅱ) with various factors, using the biosorbent, was investigated. The results show that the adsorption equilibrium could be reached within a short time (10 min), and the adsorption capacity of Cu(Ⅱ) reached up to 757.45 mg/g. The adsorption kinetics and adsorption isotherms were well-fitted with the pseudo-second-order and the Freundlich isotherm models, respectively. The adsorption process of the composite is mainly controlled by chemisorption, and functional group chelation and electrostatic force were the adsorption mechanisms; pore filling also has a great influence on the adsorption of Cu(Ⅱ). It was found that the prepared modified nanocellulose composite has great potential for the removal of heavy metals from water.

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Robust and lightweight biofoam based on cellulose nanofibrils for high-efficient methylene blue adsorption

Cited by 18 publications

References 73 publications

Nanocellulose/chitosan biohybrid aerogel bead adsorbent for removal of diclofenac sodium from wastewater: preparation, characterization, and adsorption mechanism

Nanocellulose/chitosan biohybrid aerogel bead adsorbent for removal of diclofenac sodium from wastewater: preparation, characterization, and adsorption mechanism

Adsorption of Methylene Blue from Aqueous Solution Using Gelatin-Based Carboxylic Acid-Functionalized Carbon Nanotubes@Metal–Organic Framework Composite Beads

Fabrication of Polyethyleneimine-Modified Nanocellulose/Magnetic Bentonite Composite as a Functional Biosorbent for Efficient Removal of Cu(Ⅱ)

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