Electrospun polyacrylonitrile nanofibers functionalized with EDTA for adsorption of ionic dyes

Chaúque, Eutilério F.C.; Dlamini, Langelihle Nsikayezwe; Adelodun, Adedeji A.; Greyling, C.; Ngila, Jane Catherine

doi:10.1016/j.pce.2016.10.008

Cited by 54 publications

(23 citation statements)

References 39 publications

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“…The determination coefficient of the Freundlich model was higher than that of the Langmuir model, which indicated that the Freundlich model fitted the adsorption data better than the Langmuir one. It was inferred that the Cu(II) ions were collected in multiple layers on the heterogeneous surface of the surface-modified PAN fibers [24]. The maximum experimental adsorption capacity on the surfacemodified PAN fibers was 112.3 mg/g, which was in the range with the values reported in the literature (45-151 mg/g) for the Cu(II) adsorption capacity on amine-modified PAN fibers (Table 3)…”

Section: Adsorption Isothermssupporting

confidence: 62%

“…The experimental data fitted the pseudo-second-order kinetic model better than the pseudo-first-order one. These results indicated that the adsorption rate of Cu(II) on the surface-modified PAN fibers depended on the adsorbate concentration and the number of active sites of the adsorbent [24]. Previous studies have also revealed that the adsorption of Cu(II) on amine-modified PAN fibers followed the pseudo-second-order kinetic model [2,8,25].…”

Section: Adsorption Kineticsmentioning

confidence: 57%

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Removal of Cu(II) from Aqueous Solutions Using Amine-Doped Polyacrylonitrile Fibers

et al. 2020

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Polyacrylonitrile (PAN) fibers were prepared via electrospinning and were modified with diethylenetriamine (DETA) to fabricate surface-modified PAN fibers. The surface-modified PAN fibers were used to evaluate their adsorption capacity for the removal of Cu(II) from aqueous solutions. Batch adsorption experiments were performed to examine the effects of the modification process, initial concentration, initial pH, and adsorbent dose on the adsorption of Cu(II). Kinetic analysis revealed that the experimental data fitted the pseudo-second-order kinetic model better than the pseudo-first-order model. Adsorption equilibrium studies were conducted using the Freundlich and Langmuir isotherm models, and the findings indicated that the PAN fibers modified with 85% DETA presented the highest adsorption capacity for Cu(II) of all analyzed samples. Moreover, the results revealed that the Freundlich model was more appropriate than the Langmuir one for describing the adsorption of Cu(II) onto the modified fibers at various initial Cu(II) concentrations. The maximum adsorption capacity was determined to be 87.77 mg/g at pH 4, and the percent removal of Cu(II) increased as the amount of adsorbent increased. Furthermore, the surface-modified PAN fibers could be easily regenerated using NaOH solution. Therefore, surface-modified PAN fibers could be used as adsorbents for the removal of Cu(II) from aqueous solutions.

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Section: Adsorption Isothermssupporting

confidence: 62%

Section: Adsorption Kineticsmentioning

confidence: 57%

Removal of Cu(II) from Aqueous Solutions Using Amine-Doped Polyacrylonitrile Fibers

et al. 2020

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“…4 shows a typical TGA thermogram of weight loss as a function of the temperature for PAN-based NF with and without the addition of graphene. The results show that both samples exhibited three distinct weight loss stages:~25-289°C corresponds to the loss of moisture, physisorbed and chemisorbed water molecules [14],~290-548°C corresponds to the decomposition of side chains of PAN, and~548-800°C corresponds to the decomposition of the main chain of PAN [15,16]. The results obtained from this TGA thermogram are important in determining the temperature for each pyrolysis step during the activation of the NF.…”

Section: Effects Of Graphene Incorporation Towards Thementioning

confidence: 99%

Activated‐Carbon Nanofibers/Graphene Nanocomposites and Their Adsorption Performance Towards Carbon Dioxide

Othman

2020

Chem Eng & Technol

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Activated‐carbon nanofibers (ACNFs) provide a relatively new, modified structure of carbon‐based adsorbents that have the ability to adsorb carbon dioxide due to their high specific surface area, wide distribution of porous structures, and high volume of active sites. In this study, cost‐effective agricultural waste‐based graphene synthesized from rice husk ashes was used as additive to enhance the ACNF properties. ACNF/graphene (gACNF) is still a relatively unexplored adsorbent. The resultant gACNF exhibited better thermal stability properties, with higher yield, larger specific surface area, and higher micropore volume. These properties are the main factors contributing to their enhanced adsorption performance towards CO2.

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“…The dye pollutant in water causes mutagenesis, carcinogenesis, chromosomal fractures, and respiratory toxicity even at lower concentrations. Adsorption has been widely accepted as a promising technique due to its simplicity, efficiency, and environmental friendliness for removal of various pollutants in water [23][24][25][26][27][28]. The schematic depiction of removal of dyes using adsorbents is depicted in Fig.…”

Section: Removal Of Dye Pollutantsmentioning

confidence: 99%

Filtering Media by Electrospinning

Focarete¹,

Gualandi²,

Ramakrishna³

2018

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Increasing demand for access to clean and safe water around the globe emphasizes the development of new technologies for removing environmental pollutants. Especially, organic pollutants including dyes, volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), pesticides, herbicides, and antibiotics prominently affect environmental health due to their hazardous nature. In the past several decades, advancements in electrospun fibrous membranes have resulted as an efficient filtering platform for removal of various pollutants in water, air, and soil. Electrospun nanofibers are efficient filters complementing their unique feature of accommodating a variety of functional molecules. The choice of material and the effect of experimental condition including pH, contact time, and adsorbent dosage on pollutant removal efficiency have been extensively reviewed previously. Our chapter focuses on recent progress in the developments of the electrospun functional nanofibrous composite membrane for various organic pollutants removal.

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Electrospun polyacrylonitrile nanofibers functionalized with EDTA for adsorption of ionic dyes

Cited by 54 publications

References 39 publications

Removal of Cu(II) from Aqueous Solutions Using Amine-Doped Polyacrylonitrile Fibers

Removal of Cu(II) from Aqueous Solutions Using Amine-Doped Polyacrylonitrile Fibers

Activated‐Carbon Nanofibers/Graphene Nanocomposites and Their Adsorption Performance Towards Carbon Dioxide

Filtering Media by Electrospinning

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