Production of polyacrylonitrile/ionic covalent organic framework hybrid nanofibers for effective removal of chromium(VI) from water

Herath, Amali; Salehi, Maryam; Jansone‐Popova, Santa

doi:10.1016/j.jhazmat.2021.128167

Cited by 54 publications

(13 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In wastewater treatment technology, ENMs have attracted great interest due to their good permeability, stability, easy handling, and low energy consumption [75,136,137]. In the past, innovative developments in electrospinning equipment and technology have enabled the functionalization of nanofibers for electrospray and multi-jet electrospinning [138]. At the same time, electrospinning technology is widely used in the preparation of ENMs due to their high porosity, ease of preparation, and high specific surface area [139].…”

Section: Discussionmentioning

confidence: 99%

Electrospun Nanofiber Membrane: An Efficient and Environmentally Friendly Material for the Removal of Metals and Dyes

Guo

Zhang

et al. 2023

Molecules

View full text Add to dashboard Cite

With the rapid development of nanotechnology, electrospun nanofiber membranes (ENM) application and preparation methods have attracted attention. With many advantages such as high specific surface area, obvious interconnected structure, and high porosity, ENM has been widely used in many fields, especially in water treatment, with more advantages. ENM solves the shortcomings of traditional means, such as low efficiency, high energy consumption, and difficulty in recycling, and it is suitable for recycling and treatment of industrial wastewater. This review begins with a description of electrospinning technology, describing the structure, preparation methods, and factors of common ENMs. At the same time, the removal of heavy metal ions and dyes by ENMs is introduced. The mechanism of ENM adsorption on heavy metal ions and dyes is chelation or electrostatic attraction, which has excellent adsorption and filtration ability for heavy metal ions and dyes, and the adsorption capacity of ENMs for heavy metal ions and dyes can be improved by increasing the metal chelation sites. Therefore, this technology and mechanism can be exploited to develop new, better, and more effective separation methods for the removal of harmful pollutants to cope with the gradually increasing water scarcity and pollution. Finally, it is hoped that this review will provide some guidance and direction for research on wastewater treatment and industrial production.

show abstract

Section: Discussionmentioning

confidence: 99%

Electrospun Nanofiber Membrane: An Efficient and Environmentally Friendly Material for the Removal of Metals and Dyes

Guo

Zhang

et al. 2023

Molecules

View full text Add to dashboard Cite

show abstract

“…Despite using the chemical desorption by 1 M NaOH and 0.1 M HCl, the PAN/COF nanofibers could not be completely regenerated, but it did not significantly affect the removal efficiency even after five cycles. 140 Zhang et al prepared a chitosan membrane loaded with hydrazone-linked COF (CM@COF) using freeze-casting method for the separation of several metals, including copper(II) and chromium(VI). 141 The adsorption capacity of CM@COF was found to be 122 mg g −1 for copper and 388 mg g −1 for chromium.…”

Section: Evaluating Cof Membranes In Water Treatmentmentioning

confidence: 99%

Covalent Organic Framework Membranes and Water Treatment

Asif,

Kim,

Nguyen

et al. 2024

J. Am. Chem. Soc.

View full text Add to dashboard Cite

Covalent organic frameworks (COFs) are an emerging class of highly porous crystalline organic polymers comprised entirely of organic linkers connected by strong covalent bonds. Due to their excellent physicochemical properties (e.g., ordered structure, porosity, and stability), COFs are considered ideal materials for developing state-of-the-art separation membranes. In fact, significant advances have been made in the last six years regarding the fabrication and functionalization of COF membranes. In particular, COFs have been utilized to obtain thin-film, composite, and mixed matrix membranes that could achieve effective rejection (mostly above 80%) of organic dyes and model organic foulants (e.g., humic acid). COF-based membranes, especially those prepared by embedding into polyamide thin-films, obtained adequate rejection of salts in desalination applications. However, the claims of ordered structure and separation mechanisms remain unclear and debatable. In this perspective, we analyze critically the design and exploitation of COFs for membrane fabrication and their performance in water treatment applications. In addition, technological challenges associated with COF properties, fabrication methods, and treatment efficacy are highlighted to redirect future research efforts in realizing highly selective separation membranes for scale-up and industrial applications.

show abstract

“…The detoxification of chromium (Cr) is a unique challenge, particularly for its hazardous Cr( vi ) species. 5 Cr( vi ) ions readily spread within ecosystems, and can lead to respiratory infections, organ fibrosis, lung tumors, and nasal neoplasm in humans; 6 in contrast, Cr( iii ) is a less hazardous valency and undergoes simple complexation with functional ligands. 7 Accordingly, there is a growing desire to use dynamic disposal pathways for the decontamination of Cr( vi ) ions from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Tunable thiophene-based conjugated microporous polymers for the disposal of toxic hexavalent chromium

Kotp¹,

Torad²,

Nara³

et al. 2023

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

Production of polyacrylonitrile/ionic covalent organic framework hybrid nanofibers for effective removal of chromium(VI) from water

Cited by 54 publications

References 69 publications

Electrospun Nanofiber Membrane: An Efficient and Environmentally Friendly Material for the Removal of Metals and Dyes

Electrospun Nanofiber Membrane: An Efficient and Environmentally Friendly Material for the Removal of Metals and Dyes

Covalent Organic Framework Membranes and Water Treatment

Tunable thiophene-based conjugated microporous polymers for the disposal of toxic hexavalent chromium

Contact Info

Product

Resources

About