The removal of heavy metal ions from aqueous solutions by amine functionalized cellulose pretreated with microwave-H<sub>2</sub>O<sub>2</sub>

Zhang, Cunzhi; Su, Juanjuan; Zhu, Hongxiang; Xiong, Jianhua; Liu, Xinliang; Li, Dongxue; Chen, Yangmei; Li, Yunhua

doi:10.1039/c7ra03056h

Cited by 93 publications

(32 citation statements)

References 27 publications

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“…Cellulose powder has hydroxyl groups on the surface and is therefore easily dispersible in polar solvents such as water [33][34][35][36]. Another form of cellulose specifically used for the synthesis of composites is microcrystalline cellulose [37,38], which has similar characteristics to cellulose powder, but has a larger exposed surface area, thus increasing its reactivity in the chemical environment and facilitating interaction with the other components of the mixture. For the same reason, nanocellulose has also been used for the synthesis of cellulose-based composites [39,40].…”

Section: Cellulose-pei Composites: Synthetic Strategies 21 Cellulosmentioning

confidence: 99%

“…The use of GAL involves cross-linking between (b)PEI and cellulose through the formation of a Schiff base and a hemiacetal, as shown in Scheme 3. The reaction can be conducted one pot through simple stirring in polar solvents [35,38], and it is possible to operate even at room temperature. However, by increasing the reaction temperature, it is possible to increase the value of the cellulose/PEI ratio, obtaining a more stable product thanks to the higher amount of the cellulosic polymer [33].…”

Section: Cross-linking Strategiesmentioning

confidence: 99%

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Synthesis and Application of Cellulose-Polyethyleneimine Composites and Nanocomposites: A Concise Review

2021

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Cellulose/polyethyleneimine composites have increasingly attracted the attention of scientific community, devoted to the design and development of new synthetic strategies and materials for different application fields. In this review, after introducing the main characteristics of the two polymeric components, we provide in the second section a critical overview on the main protocols for the synthesis of these composites, considering both the several cellulose sources and forms, and the different cross-linkers and cross-linking procedures developed for this purpose, outlining advantages and limits for the reported approaches. The last section analyses the principal results obtained in different application fields. A wide discussion is dedicated to the principal use of cellulose/polyethyleneimine composites as sorbents for water remediation from heavy metal ions and organic contaminants. Subsequently, we introduce the literature describing the use of these composites, functionalized appropriately, where necessary, as drug delivery systems, sensors, and heterogeneous catalysts for organic reactions. Finally, after a brief description of other random applications, we furnish a personal analysis of actual limits and potentialities for these systems.

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Section: Cellulose-pei Composites: Synthetic Strategies 21 Cellulosmentioning

confidence: 99%

Section: Cross-linking Strategiesmentioning

confidence: 99%

Synthesis and Application of Cellulose-Polyethyleneimine Composites and Nanocomposites: A Concise Review

2021

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“…It was found that the adsorption efficacy of Cd(II) increased with increasing pH of the solution, and reached the maximum adsorption value at pH (6-7). Zhu et al [36] showed similar results for their research work on the adsorption of Cd(II) and Pb(II) ions via amine-functionalized cellulose. The low metal sorption at lower pH, may be explained on the basis of active sites being protonated, resulting in a competition between H + and M 2+ for occupancy of the binding sites [37].…”

Section: Effect Of Phmentioning

confidence: 58%

“…The experimental and calculated values of q e are also very close, as shown in Table 1; thereby, the pseudo-second-order kinetic equation is more appropriate for describing the adsorption kinetics behaviors of Cd(II) on the 1,2,3,4-tetrahydropyrimidine derivative (4). Zhu and colleagues [36] showed that the pseudo-second-order equation better depicts the sorption kinetics of Pb(II) and Cd(II) on amine-functionalized cellulose.…”

Section: Kinetic Studymentioning

confidence: 61%

1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

M’hamed

Khezami

2019

Environments

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The aim of this work was to evaluate the performance of a 1,2,3,4-tetrahydropyrimidine derivative as a powerful heterocyclic compound for the elimination of Cd(II) ions from aqueous solutions. The tetrahydropyrimidine derivative was prepared during 30 min of milling by planetary ball mill with a ball-to-powder mass ratio of 8:1 and a rotation speed of 750 rpm. Nuclear magnetic resonance (NMR) and infrared (IR) were used to identify the obtained tetrahydropyrimidine derivatives. Furthermore, batches of experiments were carried out to establish the adsorption equilibrium, kinetics, and thermodynamic variables of the tetrahydropyrimidine derivatives for toxic heavy Cd(II) ions. The adsorption data were simulated by applying the Langmuir manner, the Freundlich equation, the pseudo-first-order and pseudo-second-order equations. The adsorption procedure was discovered to be very influenced by PH. The removal of heavy metal ions reached a maximum value quickly within 6 min and the adsorption data better adjusted the Langmuir isotherm than that of the Freundlich isotherm. The maximum Cd(II) ions adsorption capacity was approximated to be 151.16 mg g−1 at 328 K and a pH of 6 to 7. It was found that the adsorption kinetics of Cd(II) ions obeyed pseudo-second-order adsorption kinetics. The examination of the thermodynamic variables of tetrahydropyrimidine derivative showed a spontaneous endothermic adsorption procedure. Otherwise, positive entropy values put forward a rise in the randomness at the solid-solution interface when heavy metal ions are adsorbed.

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“…In addition, an increasing trend in the bands 2917 and 2846 cm −1 was observed in the following order: uncrosslinked CNF < with crosslinker (unheated) < with crosslinker (heated). These two bands correspond to the aliphatic C–H stretching 34 . The increase in this peak in the unheated sample (compared to CNF without crosslinker sample) is believed to result from the presence of the crosslinker which contains multiple aliphatic C–H bonds on its backbone.…”

Section: Resultsmentioning

confidence: 99%

Characterization and properties of hybrid foams from nanocellulose and kaolin-microfibrillated cellulose composite

González-Ugarte

Hafez

Tajvidi

2020

Sci Rep

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Hybrid nanocellulose-based foams are a desirable class of low-density and porous materials for their potential in many applications. This study aims at characterizing and understanding the structure-properties relationship of four foam formulations prepared from combinations of cellulose nanofibrils (CNF), cellulose nanocrystals (CNC), and kaolin-microfibrillated cellulose composite. All the foams were crosslinked with a polyamide-epichlorohydrin crosslinker (Polycup) to impart stability under wet conditions without additional functionalization. Foams containing 25 wt% kaolin exhibited excellent shape recovery promoted by a higher load of crosslinker (5 wt%), and superior compressive properties. The addition of CNC at 33.3 wt% and 50 wt% did not seem to enhance the properties of the foam and also reduced the specific surface area. A preliminary comparative study between the four tested formulations was conducted to assess the feasibility of the foam as an adsorbent of methylene blue dye.

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The removal of heavy metal ions from aqueous solutions by amine functionalized cellulose pretreated with microwave-H₂O₂

Abstract: Microcrystalline cellulose pretreated with microwave-H2O2 was introduced with carboxyl and amino groups to obtain a new promising bioadsorbent.

Cited by 93 publications

References 27 publications

Synthesis and Application of Cellulose-Polyethyleneimine Composites and Nanocomposites: A Concise Review

Synthesis and Application of Cellulose-Polyethyleneimine Composites and Nanocomposites: A Concise Review

1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

Characterization and properties of hybrid foams from nanocellulose and kaolin-microfibrillated cellulose composite

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The removal of heavy metal ions from aqueous solutions by amine functionalized cellulose pretreated with microwave-H2O2

Abstract: Microcrystalline cellulose pretreated with microwave-H2O2 was introduced with carboxyl and amino groups to obtain a new promising bioadsorbent.

Cited by 93 publications

References 27 publications

Synthesis and Application of Cellulose-Polyethyleneimine Composites and Nanocomposites: A Concise Review

Synthesis and Application of Cellulose-Polyethyleneimine Composites and Nanocomposites: A Concise Review

1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

Characterization and properties of hybrid foams from nanocellulose and kaolin-microfibrillated cellulose composite

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The removal of heavy metal ions from aqueous solutions by amine functionalized cellulose pretreated with microwave-H₂O₂