Removal of Cr (VI) from aqueous solutions using chitosan/MWCNT/Fe 3 O 4  composite nanofibers-batch and column studies

Beheshti, Hoda; Irani, Mohammad; Hosseini, L Gholam; Rahimi, Arash; Aliabadi, Majid

doi:10.1016/j.cej.2015.08.158

Cited by 193 publications

(50 citation statements)

References 39 publications

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“…The electrospinning (ES) technique is a one-step preparation method for engineering polymeric fibers on nanometer and micrometer scales; with extensive recent explorations in filtration, encapsulation, scaffold and biomedical remits [1][2][3]. Nonwoven mats fabricated via the ES process provide numerous advantages conferred by high surface area, moisture permeability and random fiber arrangement [4,5].…”

Section: Introductionmentioning

confidence: 99%

Designer fibers from 2D to 3D – Simultaneous and controlled engineering of morphology, shape and size

Yao

Zhang

Ahmad

et al. 2018

Chemical Engineering Journal

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Topography and surface morphology of micrometer and nanometer scaled fibrous biomaterials are crucial for bioactive component encapsulation, release, promoting cell proliferation and interaction within biological environment. Specifically, for drug delivery and tissue repair applications, surface engineering provides control on both aspects in tandem. In this study, the bioactive component (ganoderma lucidum spore polysaccharide (GLSP)) was loaded into zein prolamine (ZP) fiber matrices via coaxial electrospinning (CES) technique. During the CES process, various outer layer enveloping fluids were used to modulate fiber topography in-situ (from 2D to 3D). SEM and water contact angle tests indicate enveloping media impact electrospun fiber diameter (ranging from 400 nm to 3.0 μm) and morphologies (from flat ribbon-like to solid cylindrical structures), with the latter impacting GLSP release profile. Furthermore, CCK-8 assay assessment indicates fibroblast cell proliferation (L929 cell line), while cell extension was also observed for modified ZP fibers. The results demonstrate potential applications of modified fiber morphologies, which are tailored in-situ without impacting chemical stability and encapsulation.

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Section: Introductionmentioning

confidence: 99%

Designer fibers from 2D to 3D – Simultaneous and controlled engineering of morphology, shape and size

Yao

Zhang

Ahmad

et al. 2018

Chemical Engineering Journal

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“…The removal capacity is dependent on pH (≈2) and temperature (45 °C) and there was no significant change in removal efficiency for both fixed and batch bed column systems. The removal efficiency of fibers did not change significantly for five cycles . Later, the electrospun chitosan nanofibers were deposited on spiral wound module (SWM) which improved membrane area to volume ratio and packing density.…”

Section: Removal Of Heavy Metal Ionsmentioning

confidence: 99%

Bio‐Based Nanofibers Involved in Wastewater Treatment

Gandavadi

Sundarrajan

Ramakrishna

2019

Macro Materials & Eng

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Studies involving bio‐based nanofibers are well utilized in the field of energy, catalysis, electronics, and environmental science. In this review, the importance of utilizing bio‐based materials for the development and optimization of multiplexed nanofibers and the modifications adopted to overcome the drawbacks of conventional electro‐spinning to facilitate better production rates, enhanced adsorption, and its potential in removing heavy metal ions, dyes, and other contaminants polluting the environment are highlighted. This work provides the readers the ability to understand the complexity in fabrication of bio‐based nanofibers focusing primarily on chitosan, cellulose, and protein‐based nanofibers and their mechanism toward quenching/degradation of water contaminants. In addition, it also provides the advantages of using bio‐based materials over synthetic materials for the development of nanofibers.

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“…For this reason, the elimination of Cr (VI) from natural waters and sewage plants is one of the great targets to get rid of from the toxicity. Cr (VI) is one of the poisonous substances and is originated from electroplating, mining industry, metal plating, leather tanning, photography, steel manufacturing, dye, and textiles industries (Qiu et al 2014;Cao et al 2014;Beheshti et al 2016;Lv et al 2019;Liu et al 2018;Wang et al 2013;Yuan et al 2010).…”

Section: Introductionmentioning

confidence: 99%

ZnO-TiO2 doped polyacrylonitrile nano fiber-Mat for elimination of Cr (VI) from polluted water

et al. 2019

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PAN nanofiber-Mat (n-fib@Mat), PAN/ZnO n-fib@Mat, and PAN/ZnO-TiO 2 n-fib@Mat were prepared via electrospinning method. Their high adsorption capacities against dissolved Cr (VI) ions make them as super adsorbents for water treatment. The structure of n-fib@Mat was investigated using XRD, FTIR, SEM, and TEM techniques. The effects of selected parameters such as contact time, initial concentration, and n-fib@Mat amount were assessed in a fixed bed reactor. It was found that the adsorption capacities of PAN n-fib@Mat, PAN/ZnO n-fib@Mat, and PAN/ZnO-TiO 2 n-fib@Mat were pH-dependent and the optimal pH value was between 2.1 and 2.2. The adsorption was rapid, and the equilibrium was reached within 240 min to remove of Cr (VI) ions for PAN/ZnO-TiO 2 n-fib@Mat and 360 min for PAN n-fib@Mat and PAN-ZnO n-fib@Mat. Langmuir isotherms model is preferred for PAN n-fib@Mat, PAN-ZnO n-fib@Mat, and PAN/ZnO-TiO 2 n-fib@Mat for Cr (VI) adsorption. The equilibrium adsorption capacities are 153.85 mg/g, 234.52 mg/g, and 333.43 mg/g for PAN n-fib@Mat, PAN/ZnO n-fib@Mat, and PAN/ZnO-TiO 2 n-fib@Mat for Cr (VI), respectively. The produced n-fib@Mat showed excellent removal ability for Cr (VI). The adsorption kinetic was obeyed pseudo-second-order reaction rate.

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Removal of Cr (VI) from aqueous solutions using chitosan/MWCNT/Fe 3 O 4 composite nanofibers-batch and column studies

Cited by 193 publications

References 39 publications

Designer fibers from 2D to 3D – Simultaneous and controlled engineering of morphology, shape and size

Designer fibers from 2D to 3D – Simultaneous and controlled engineering of morphology, shape and size

Bio‐Based Nanofibers Involved in Wastewater Treatment

ZnO-TiO2 doped polyacrylonitrile nano fiber-Mat for elimination of Cr (VI) from polluted water

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