Polyethylenimine-functionalized polyacrylonitrile anion exchange fiber as a novel adsorbent for rapid removal of nitrate from wastewater

Sun, Yue; Zheng, Weisheng

doi:10.1016/j.chemosphere.2020.127373

Cited by 36 publications

(15 citation statements)

References 53 publications

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“…Poly(ethyleneimine) (PEI), a water-soluble cationic polyelectrolyte, has been widely used in the fields of catalysis, fiber modification, gene delivery, − separation and wastewater adsorption, , and sensing …”

Section: Introductionmentioning

confidence: 99%

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Nitrogen-Doped Carbon Quantum Dots from Poly(ethyleneimine) for Optical Dual-Mode Determination of Cu²⁺ and l-Cysteine and Their Logic Gate Operation

Liu

Zhang

et al. 2020

ACS Appl. Mater. Interfaces

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In this work, nitrogen-doped carbon quantum dots from poly(ethyleneimine) (PQDs) were synthesized by a low-cost and facile one-step hydrothermal method without other reagents. A quantum yield (QY) of up to 23.2% with maximum emission at 460 nm under an excitation wavelength of 340 nm was ascribed to the high nitrogen doping (20.59%). The PQDs selectively form a blue complex with Cu 2+ accompanied by strong quenching of the fluorescence emission. Meanwhile, the PQD-Cu 2+ complex exhibited selective fluorescence recovery and color disappearance on exposure to L-cysteine (Cys). The electron transfer from amino or oxygen groups on the PQDs to Cu 2+ leads to fluorescence quenching, and a chromogenic reaction of the cuprammonium complex results in a color change. The strong affinity between Cys and Cu 2+ causes the detachment of Cu 2+ from the surface of PQDs, so the color of the solution disappears and the fluorescence of PQDs recovers. Under the optimized condition, the proposed sensor was applied to detect Cu 2+ in the linear range of 0−280 μM. A detection limit of 4.75 μM is achieved using fluorescence spectroscopy and 4.74 μM by monitoring the absorbance variation at 272 nm. For Cys detection, the linear range of 0−800 μM with detection limits of 28.11 μM (fluorescence determination) and 19.74 μM (peak shift determination at 272 nm) was obtained. Meanwhile, the PQD-Cu 2+ system exhibits distinguishable responses to other biothiols such as L-glutathione (GSH) and DL-homocysteine (Hcy). Based on the multimode signals, an "AND" logic gate was constructed successfully. Interestingly, besides Cu 2+ , Fe 3+ can also quench the fluorescence of PQDs and the PQD-Fe 3+ system exhibits superior selectivity for Cys detection. Most importantly, the proposed assay is not only simple, cheap, and stable but also suitable for detecting Cu 2+ and Cys in some real samples.

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Section: Introductionmentioning

confidence: 99%

“…Poly(ethyleneimine) (PEI), a water-soluble cationic polyelectrolyte, has been widely used in the fields of catalysis, 16 fiber modification, 17 gene delivery, 18−20 separation and wastewater adsorption, 21,22 and sensing. 23 In recent years, PEI was also widely used in the preparation of N-CQDs (Table S1 in the Supporting Information).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Carbon Quantum Dots from Poly(ethyleneimine) for Optical Dual-Mode Determination of Cu²⁺ and l-Cysteine and Their Logic Gate Operation

Liu

Zhang

et al. 2020

ACS Appl. Mater. Interfaces

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“…Polyacrylonitrile fibers (PANFs) are a promising matrix material for adsorption of pollutants due to their prominent regeneration capability, superior durability, and resistance to solvents and chemicals. 30 More importantly, PANFs contain sufficient amounts of nitrile groups that can be flexibly modified via a wide range of secondary reactions. 31 This fiber material has the characteristics of low cost, simple preparation and good recyclability.…”

Section: Introductionmentioning

confidence: 99%

“…32,33 In recent years, several workers have used polyacrylonitrile fibers as carriers to prepare new adsorbents. 30,34,35 In our previous work, we also focused on designing and synthesizing dipyridine, 36 aminophosphonic acid, 37 quaternary ammonium salt, 38 and chelated iron 39 functionalized fibers for removal of heavy metal ions and phosphate. For example, phosphate adsorption via iron loaded aminated polyacrylonitrile fibers reached an equilibrium value (24.14 mg P g −1 ) after 5 min.…”

Section: Introductionmentioning

confidence: 99%

Efficient capture of phosphate from wastewater by a recyclable ionic liquid functionalized polyacrylonitrile fiber: a typical “release and catch” mechanism

Zheng

et al. 2022

Environ. Sci.: Water Res. Technol.

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“…Polyacrylonitrile fiber (PANF) is widely used as a water treatment adsorbent because of its comprehensive strength, resistance to organic solvents, and excellent heat resistance. More importantly, a large number of cyano-groups in PANF can be easily converted into amide, carboxylic acid, amidoxime, hydrazide, and other groups. ,− Phosphate, polydopamine, and polyethylenimine have been grafted on the surface of PAN fiber. The modified PANF could achieve excellent adsorption through ion exchange, electrostatic attraction, and complexing force, − such as the adsorption of palladium ions, copper and silver ions, chromium ions, oil, diesel, and Microcystis aeruginosa cells .…”

Section: Introductionmentioning

confidence: 99%

Efficient Adsorption of Anionic Dyes by Ammoniated Waste Polyacrylonitrile Fiber: Mechanism and Practicability

et al. 2021

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Adsorption is one of the commonly used methods in wastewater treatment, but it has the problem of high cost and a complicated production process. In this paper, a low-cost and efficient decolorizing adsorbent was successfully prepared based on waste polyacrylonitrile fiber (PANF). The waste PANF was ammoniated by propylene diamine derivates (PANA M F), and benzylamine (PANA BM F) and quaternary ammonium ions (PANQ M F) were introduced for PANA M F to regulate hydrophilicity and hydrophobicity. With acidic red 249 as the model anionic dye, influences of the adsorption center structure, the degree of modification, the concentration of acid, the dye structure, and the auxiliary agent in the solution on the dye adsorption performance were studied. Isothermal models, kinetic models, reusability, and continuous application ability of the fiber adsorbent were discussed. PANA M F, PANA BM F, and PANA Q F exhibit excellent adsorption performance compared to the common adsorbent. After protonation, the saturation adsorption value can reach 2051.3 mg/g for PANA M F. PANA M F also exhibited excellent reusability, and the adsorption capacity after being reused eight times still can keep 72.7% of that for the first time. The adsorption of the anionic dye for PANA M F is a chemisorption process, and the rate-determining step is changed from the diffuse step to the adsorption on the surface with the adsorption time. PANA M F can also be used in the continuous flow process, and the absorption amount is similar to that in the batch adsorption, which shows excellent commercial application potential.

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Polyethylenimine-functionalized polyacrylonitrile anion exchange fiber as a novel adsorbent for rapid removal of nitrate from wastewater

Cited by 36 publications

References 53 publications

Nitrogen-Doped Carbon Quantum Dots from Poly(ethyleneimine) for Optical Dual-Mode Determination of Cu²⁺ and l-Cysteine and Their Logic Gate Operation

Nitrogen-Doped Carbon Quantum Dots from Poly(ethyleneimine) for Optical Dual-Mode Determination of Cu²⁺ and l-Cysteine and Their Logic Gate Operation

Efficient capture of phosphate from wastewater by a recyclable ionic liquid functionalized polyacrylonitrile fiber: a typical “release and catch” mechanism

Efficient Adsorption of Anionic Dyes by Ammoniated Waste Polyacrylonitrile Fiber: Mechanism and Practicability

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Polyethylenimine-functionalized polyacrylonitrile anion exchange fiber as a novel adsorbent for rapid removal of nitrate from wastewater

Cited by 36 publications

References 53 publications

Nitrogen-Doped Carbon Quantum Dots from Poly(ethyleneimine) for Optical Dual-Mode Determination of Cu2+ and l-Cysteine and Their Logic Gate Operation

Nitrogen-Doped Carbon Quantum Dots from Poly(ethyleneimine) for Optical Dual-Mode Determination of Cu2+ and l-Cysteine and Their Logic Gate Operation

Efficient capture of phosphate from wastewater by a recyclable ionic liquid functionalized polyacrylonitrile fiber: a typical “release and catch” mechanism

Efficient Adsorption of Anionic Dyes by Ammoniated Waste Polyacrylonitrile Fiber: Mechanism and Practicability

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Product

Resources

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Nitrogen-Doped Carbon Quantum Dots from Poly(ethyleneimine) for Optical Dual-Mode Determination of Cu²⁺ and l-Cysteine and Their Logic Gate Operation

Nitrogen-Doped Carbon Quantum Dots from Poly(ethyleneimine) for Optical Dual-Mode Determination of Cu²⁺ and l-Cysteine and Their Logic Gate Operation