Advances in cyclodextrin polymers adsorbents for separation and enrichment: Classification, mechanism and applications

Zhao, Binfen; Jiang, Liyan; Jia, Qiong

doi:10.1016/j.cclet.2021.06.031

Cited by 50 publications

(21 citation statements)

References 130 publications

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“…Consequently, cyclodextrin-based adsorbents have been sparsely employed for environmental applications [50][51][52][53][54][55][56][57][58][59] because of the specific properties of cyclodextrin (CD) molecules which could entrap organic compounds with a suitable size into the cyclodextrin cavity to form an inclusion complex through host-guest interaction. Furthermore, citric acid (CTR) is an ecofriendly trifunctional cross-linking agent, which was reticulated with CD to obtain a three-dimensional cross-linked polymer for the enhancement of the adsorption performance of organic compounds [22,23,26,32,35,36].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cationic Pollutants from Water by Cotton Rope Coated with Cyclodextrin Polymers

2022

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The contamination from perilous organic compounds (pesticide and dyes) in water generates a significant problem for the environment and humans. A modified textile was prepared by a coating of anionic cyclodextrin polymer, obtained from the cross-linking between citric acid and β-cyclodextrin in the presence of poly (vinyl alcohol), on the cotton cord for cationic pollutant removal from an aqueous solution. Its physicochemical properties were also characterized by gravimetry, titration, stereomicroscopy, SEM, TGA, 13C NMR, and ATR-FTIR. The CC2 system exhibited 79.2% coating yield, 1.12 mmol/g COOH groups, 91.3% paraquat (PQ) removal, 97.0% methylene blue (MB) removal, and 98.3% crystal violet (CV) removal for 25 mg/L of initial concentration. The kinetics was fitted to the pseudo-second-order model using 6 h of contact time. The isotherm was suitable for the Langmuir isotherm with a maximum adsorption of 26.9 mg/g (PQ), 23.7 mg/g (MB), and 30.3 mg/g (CV). After 120 h of contact time in water and 5% v/v of HCI in ethanol, the weight loss was 7.5% and 5.6%, respectively. Finally, the recyclability performance reached 84.8% (PQ), 95.2% (MB), and 96.9% (CV) after five reuses.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Cationic Pollutants from Water by Cotton Rope Coated with Cyclodextrin Polymers

2022

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“…Cyclodextrin-based materials have been widely used for environmental applications [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ] because cyclodextrin (CD) molecules posse a well-imposed cyclic structure with a hydrophilic exterior and a hydrophobic cavity which are capable of encapsulation of organic components with a suitable size into the cyclodextrin cavity by host–guest interaction to build an inclusion complex. Moreover, the appearance of charge or different functional groups on cyclodextrin and its derivatives could enrich the adsorption capacity of organic molecules.…”

Section: Introductionmentioning

confidence: 99%

Cotton Cord Coated with Cyclodextrin Polymers for Paraquat Removal from Water

2022

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The contamination of hazardous agrochemical substances in water caused essential trouble for humans and the environment. The functional textile was used as an effective adsorbent for paraquat removal from an aqueous solution. The coating of anionic cyclodextrin polymer, issued from the cross-linking between 1,2,3,4-butanetetracarboxylic acid and β−cyclodextrin in the presence of poly (vinyl alcohol), on the cotton cord, was firstly investigated. Their physicochemical characteristics were also characterized by gravimetry, acid–base titration, ATR-FTIR, 13C NMR, TGA, and stereo-microscopy. The BDP5 system revealed 107.3% coating yield, 1.13 mmol/g COOH groups, and 95.1% paraquat removal for 25 mg/L of initial concentration. The pseudo-second-order model was appropriate for kinetics using 6 h of contact time. Langmuir isotherm was suitable with the maximum adsorption of 30.3 mg/g for paraquat adsorption. The weight loss was 10.7% and 7.8%, respectively, for water and 5% v/v of HCI in ethanol after 120 h of contact time. Finally, the reusability efficiency stayed at 88.9% after five regeneration.

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“…Various materials, such as adsorbents [9,10], ion exchange resins [11,12], chemical precipitation agents [13,14], electrochemical anodes [15] and membranes [16,17] have been used to remove heavy metal ions [18]. Among them, adsorbents are widely used due to their highly cost-effective properties and easy operation [19].…”

Section: Introductionmentioning

confidence: 99%

Layer-by-Layer Assembly of Polyelectrolytes on Urchin-like MnO2 for Extraction of Zn2+, Cu2+ and Pb2+ from Alkaline Solutions

Chen

Zhang

2022

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Three-dimensional (3D) urchin-like MnO2@poly (sodium 4-styrene sulfonate) (PSS)/poly (diallyl dimethylammonium chloride) (PDDA)/PSS particles were prepared via the layer-by-layer (LBL) assembly of polyelectrolytes for the extraction of Zn2+ from alkaline media. The adsorption performance of Zn2+ on MnO2, MnO2@PSS/PDDA/PSS, and MnO2@(PSS/PDDA)3/PSS was investigated in batch experiments. The adsorption of Zn2+ on MnO2@PSS/PDDA/PSS has been studied under various conditions, such as initial Zn2+ concentration, adsorbent dosage, the solution’s pH, and reaction time. The Zn2+ adsorption process is well represented by the pseudo-second-order kinetic model, and the equilibrium data fit the Freundlich isotherm well. MnO2@PSS/PDDA/PSS also showed high efficiency for Pb2+ and Cu2+ removal from slightly alkaline water. Thus, our research provides a deep insight into the preparation of 3D manganese oxides with polyelectrolyte films for the extraction of heavy metal ions, such as Pb2+, Cu2+, and Zn2+, from slightly alkaline wastewater.

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Advances in cyclodextrin polymers adsorbents for separation and enrichment: Classification, mechanism and applications

Cited by 50 publications

References 130 publications

Adsorption of Cationic Pollutants from Water by Cotton Rope Coated with Cyclodextrin Polymers

Adsorption of Cationic Pollutants from Water by Cotton Rope Coated with Cyclodextrin Polymers

Cotton Cord Coated with Cyclodextrin Polymers for Paraquat Removal from Water

Layer-by-Layer Assembly of Polyelectrolytes on Urchin-like MnO2 for Extraction of Zn2+, Cu2+ and Pb2+ from Alkaline Solutions

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