Heavy metal removal applications using adsorptive membranes

Vo, Thi Sinh; Hossain, Muhammad Mohsin; Jeong, Hyung Mo; Kim, Kyunghoon

doi:10.1186/s40580-020-00245-4

Cited by 167 publications

(83 citation statements)

References 124 publications

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“…Nanofibers have special structures with high surface area, high permeability, small pores with good interconnectivity, and the ability to change the functionality of fibers at the nanoscale [101]. Moreover, it is feasible to synthesize selective nanofibers depending upon target metal ion properties via the incorporation of specific functional groups, providing controllable diameter, porosity, and hydrophobicity, easier incorporation of additives, and practicability in creating the microstructure [102].…”

Section: Heavy-metal Remediationmentioning

confidence: 99%

“…In physical adsorption, van der Waals forces favor multilayer adsorption, whereas, in chemical adsorption, chemical reactions take place on the adsorbent surface [104]. Firstly, heavy metals in the wastewater transfer to the surface of nanofibers and vice versa; then, from the exterior surface of nanofibers, heavy metals diffuse into the nanofibers, which is the rate-limiting step; finally, chemical/physical interactions occur between heavy metals and nanofibers [102,103]. The significant functional groups on the nanofiber surface selectively adsorbs the heavy metal, and equilibrium is achieved at a constant concentration of adsorbed heavy metals in wastewater.…”

Section: Heavy-metal Remediationmentioning

confidence: 99%

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Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

et al. 2021

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In the past few decades, the role of nanotechnology has expanded into environmental remediation applications. In this regard, nanofibers have been reported for various applications in water treatment and air filtration. Nanofibers are fibers of polymeric origin with diameters in the nanometer to submicron range. Electrospinning has been the most widely used method to synthesize nanofibers with tunable properties such as high specific surface area, uniform pore size, and controlled hydrophobicity. These properties of nanofibers make them highly sought after as adsorbents, photocatalysts, electrode materials, and membranes. In this review article, a basic description of the electrospinning process is presented. Subsequently, the role of different operating parameters in the electrospinning process and precursor polymeric solution is reviewed with respect to their influence on nanofiber properties. Three key areas of nanofiber application for water treatment (desalination, heavy-metal removal, and contaminant of emerging concern (CEC) remediation) are explored. The latest research in these areas is critically reviewed. Nanofibers have shown promising results in the case of membrane distillation, reverse osmosis, and forward osmosis applications. For heavy-metal removal, nanofibers have been able to remove trace heavy metals due to the convenient incorporation of specific functional groups that show a high affinity for the target heavy metals. In the case of CECs, nanofibers have been utilized not only as adsorbents but also as materials to localize and immobilize the trace contaminants, making further degradation by photocatalytic and electrochemical processes more efficient. The key issues with nanofiber application in water treatment include the lack of studies that explore the role of the background water matrix in impacting the contaminant removal performance, regeneration, and recyclability of nanofibers. Furthermore, the end-of-life disposal of nanofibers needs to be explored. The availability of more such studies will facilitate the adoption of nanofibers for water treatment applications.

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Section: Heavy-metal Remediationmentioning

confidence: 99%

Section: Heavy-metal Remediationmentioning

confidence: 99%

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

et al. 2021

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“…The electrospun bers can be applied in biomedicine, pharmacy, food, water treatment, air purication, energy electronics and information engineering. [12][13][14][15][16][17][18][19][20][21] The electrospun bers can be fabricated using natural polymer or synthetic polymer as the main substrate materials and the appropriate solvents based on these different elds. The preparation process shows a greater deal of autonomy and plasticity.…”

Section: Introductionmentioning

confidence: 99%

Sabina chinensis leaf extracted and in situ incorporated polycaprolactone/polyvinylpyrrolidone electrospun microfibers for antibacterial application

et al. 2021

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“…As known, polymeric membrane system was extensively applied in different research fields and practical applications (1)(2)(3)(4)(5), at the same time that remarkable factors of a polymeric membrane almost regard to possibly physical, chemical and interface properties. Hence, they are necessary to conduct considerable modification methods that can obtain better desired results corresponding to multiple researches.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, chitosan (CTS) is considered to be an eco-friendly and widely-used compound of chitin N-deacetylation, which is also a potential candidate in numerous fields such as drugs, catalysis, food, etc. (1,2,(6)(7)(8). Besides, the CTS is known as a biomedical material source owing to its wound-healing ability, biodegradability, biocompatibility, hemostasis, antimicrobial activity, etc.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Gelatin/Chitosan Hydrogel Membranes

Nguyen

et al. 2021

Journal of the Turkish Chemical Society Section A: Chemistry

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The gelatin/chitosan (GEL/CTS, GC) membranes have been fabricated well by a simple in-situ method. The as-prepared GC membranes were characterized by morphological surface (scanning electron microscopy, SEM), chemical (Fourier-transform infrared spectroscopy, FT-IR), crystallinity (X-ray diffraction, XRD), thermal (thermal gravimetric analysis, TGA), mechanical (tensile test), hydrophilic (water contact angle), and swelling properties to elucidate the changes in their chemical structures and morphologies. The morphological structure of the GC membranes was found to be very smooth, non-rough and homogeneous. The FT-IR and XRD studies manifest that the GC membranes have good interaction and compatibility between GEL and CTS in the hydrogel mixture. The prepared GC membranes also obtain better thermal, mechanical and swelling properties comparing to the raw CTS molecule. These results suggest that the nontoxic GC membrane can become a preferred hydrogel membrane in the field of wound dressing or tissue-engineering applications.

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Heavy metal removal applications using adsorptive membranes

Cited by 167 publications

References 124 publications

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

Synthesis and Water Treatment Applications of Nanofibers by Electrospinning

Sabina chinensis leaf extracted and in situ incorporated polycaprolactone/polyvinylpyrrolidone electrospun microfibers for antibacterial application

Fabrication and Characterization of Gelatin/Chitosan Hydrogel Membranes

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