Enhanced naproxen adsorption by a novel β-cyclodextrin immobilized the three-dimensional macrostructure of reduced graphene oxide and multiwall carbon nanotubes

Feng, Xianlu; Qiu, Bin; Sun, Dezhi

doi:10.1016/j.seppur.2022.120837

Cited by 26 publications

(6 citation statements)

References 53 publications

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“…This may be because the NPX adsorbed on the active site was synchronously oxidized and decomposed using the reactive oxygen species generated by PMS activation, exposing the active sites again and realizing the in situ regeneration of the 3DG/A-MWCNTs. Compared to other reported systems, the adsorption synchronous oxidation method used in this study has demonstrated persistent effectiveness in removing NPX. − NPX, DCF, SMX, and CBZ (Table S3) were selected as target pollutants to investigate the universal validity of the FBR for different PPCPs. As shown in Figure b, the removal efficiencies of NPX, DCF, SMX, and CBZ were 56.2, 46.0, 49.1, and 39.6%, respectively, after 1150 min, demonstrating the excellent universal validity of the FBR.…”

Section: Resultsmentioning

confidence: 99%

A Fixed-Bed Reaction System Packed with a Graphene/Multiwalled Carbon Nanotube Scaffold for the Oxidative Removal of Naproxen

Liu,

et al. 2024

ACS Appl. Nano Mater.

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Most common adsorbents in research reports are powdered two-dimensional carbon materials, including powdered activated carbon and graphene, which tend to be lost during water treatment and cause secondary contamination. In this work, a hydrogel composed of three-dimensional graphene-doped acidified multiwalled carbon nanotubes (3DG/A-MWCNTs) was synthesized. The hydrogels with large specific surface areas and defect structures exhibited outstanding integration, compressive capacity, and negligible loss. The as-obtained material was added to a column as a continuous fixed-bed reactor (FBR). The 3DG/A-MWCNTs packed in the FBR exhibited superior adsorption and peroxymonosulfate (PMS) activation to achieve 56.2% naproxen (NPX) removal efficiency after 1150 min. The operation parameters were systematically optimized including the PMS concentration, initial pH, coexisting anions, bed height, and hydraulic retention time. Significantly, quenching, electron paramagnetic resonance, and electrochemical tests were used to demonstrate that reactive oxygen species (SO 4•− , • OH, O 2 •− , and 1 O 2 ) and electron transfer were involved in NPX degradation. The presence of active sites, oxygen vacancies, electron-rich, oxygen-containing functional groups, and defect structures within 3DG/A-MWCNTs promoted their preeminent catalytic activity. The FBR maintains a removal efficiency of 66.2% for NPX after six repetitions and exhibits excellent purification ability for various pollutants and actual surface water. These results suggest that FBR performs well in practical applications. Overall, this study expands the environmental application of three-dimensional graphene and provides promising metal-free carbon materials for eliminating refractory contaminants in continuous flow mode by using adsorption and PMS-based advanced oxidation processes.

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Section: Resultsmentioning

confidence: 99%

A Fixed-Bed Reaction System Packed with a Graphene/Multiwalled Carbon Nanotube Scaffold for the Oxidative Removal of Naproxen

Liu,

et al. 2024

ACS Appl. Nano Mater.

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“…The wide bands located at 3408-3444 cm -1 were identified as -OH. The characteristic bands at 1599-1622 cm -1 and 1029-1039 cm -1 corresponded to the presence of carboxylic C=O and C-O, respectively [36,37]. The adsorption peaks of C-N (1397 cm -1 ) and Fe-O (550 cm -1 ) appeared on MNSBC surface after FeCl3 and CO(NH2)2 activation, which suggested that N and Fe had embedded into the carbon structure [3].…”

Section: Characterizationmentioning

confidence: 95%

One-pot hydrothermal synthesis of magnetic N-doped sludge biochar for efficient removal of tetracycline from various environmental waters

Lu²,

Tang³

et al. 2022

Separation and Purification Technology

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“…At present, the inorganic materials that have been reported for immobilization of β-CD are silica gel [62,78,79], graphene oxide [63,64,80], and magnetic Fe 3 O 4 particles [65,81]. These inorganic materials have the merits of being low cost and widely available, and having a relatively high specific surface area.…”

Section: Inorganic Support-immobilized β-Cdmentioning

confidence: 99%

Achievements in Preparation of Cyclodextrin–Based Porous Materials for Removal of Pollutants

Bao,

Zhang,

Cao

et al. 2024

Separations

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Cyclodextrin–based porous materials have been widely applied in removing various organic pollutants from water environments, due to their unique physical and chemical properties, like the size–matching effect and hydrophobic interaction. Large numbers of hydroxyl groups in its external structure give cyclodextrin a high solubility in water, but the existence of these hydroxyl groups also endows cyclodextrin with the ability to be chemically modified with various functional groups to reduce its solubility in water and, meanwhile, to develop some novel functionalized cyclodextrin–based porous materials for selective removal of the target organic pollutants. This review focuses on the recent development in the synthesis of cyclodextrin–based porous materials (crosslinked cyclodextrin polymers and immobilized cyclodextrins), as well as highlighting their applications and mechanisms in the removal of dyes, endocrine disruptors, and mixed pollutants from water. Finally, the challenges and future perspectives in related research fields are discussed.

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Enhanced naproxen adsorption by a novel β-cyclodextrin immobilized the three-dimensional macrostructure of reduced graphene oxide and multiwall carbon nanotubes

Cited by 26 publications

References 53 publications

A Fixed-Bed Reaction System Packed with a Graphene/Multiwalled Carbon Nanotube Scaffold for the Oxidative Removal of Naproxen

A Fixed-Bed Reaction System Packed with a Graphene/Multiwalled Carbon Nanotube Scaffold for the Oxidative Removal of Naproxen

One-pot hydrothermal synthesis of magnetic N-doped sludge biochar for efficient removal of tetracycline from various environmental waters

Achievements in Preparation of Cyclodextrin–Based Porous Materials for Removal of Pollutants

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