Development of Nanofibers Composed of Chitosan/Nylon 6 and Tannin/Nylon 6 for Effective Adsorption of Cr(VI)

Kummer, G.; Schonhart, C.; Fernandes, Marcelo; Dotto, Guilherme L.; Missio, André Luiz; Bertuol, Daniel Assumpção; Tanabe, Eduardo Hiromitsu

doi:10.1007/s10924-018-1281-9

Cited by 25 publications

(7 citation statements)

References 69 publications

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“…It indicates that polyaniline has different charged regions on the surface or does not fill all the pores onto the membrane causing a heterogeneous coverage. These results were similar to some adsorbent materials used for chromium removal, such as nanochitosan/polyvinyl alcohol/carboxymethyl starch ternary blend 39 , ionic liquid functionalized cellulose 40 and, chitosan/nylon 6 41 .…”

Section: Adsorption Resultssupporting

confidence: 83%

Nanofibrous Membranes for Low-Concentration CrVI Adsorption: Kinetic, Thermodynamic and the Influence on ZFL Cells Viability

et al. 2021

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There is a great demand to develop different techniques for the continuous removal, immobilization, and remediation of metallic ions from contaminated water. Human contamination by metallic ions could even occur by ingestion of seafood causing carcinogenic and mutagenic activities. In this study, a nanofibrous membrane of poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) produced by electrospinning technique and coated with polyaniline (PAni) was tested for the removal of chromium in low-concentration solutions. The viability of ZFL cells (zebrafish liver cells) was performed to evaluate the water quality enhancement after chromium adsorption. The results indicated that the nanofibrous membrane successfully adsorbed the chromium species in low-concentration ( e Q = 2.44 mg/g, at pH 4.5, room temperature (RT) and 24h) by Freundlich model and followed a pseudo-second-order kinetics model indicating a possible chemisorption in multilayers, at pH 4.5, RT and [Cr VI ] = 5.0 mg/L. At pH 2.0 (24h, RT and [Cr VI ] = 5.0 mg/L), the membrane adsorbed around 91.64% of Cr VI contaminants. The thermodynamic studies revealed that the process was spontaneous and exothermic. The cells viability demonstrated the efficiency of the membrane tested in the aquatic ecosystem protection; the viability increased 19.2% in 5.0 mg/L Cr VI solution. Thus, the results of this study shows that the nanofibrous membrane can be an alternative to remove low concentration of Cr VI from aqueous solutions.

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Section: Adsorption Resultssupporting

confidence: 83%

Nanofibrous Membranes for Low-Concentration CrVI Adsorption: Kinetic, Thermodynamic and the Influence on ZFL Cells Viability

et al. 2021

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“…The parameters for checking the adsorption capacities of the membrane for MO and Cr(VI) are shown in Table 3. The adsorption of Cr(VI) obtained a maximum at pH 2, as reported by several other studies [60,61].…”

Section: Basic Adsorption Experimentssupporting

confidence: 85%

Development of Novel PET-PAN Electrospun Nanocomposite Membrane Embedded with Layered Double Hydroxides Hybrid for Efficient Wastewater Treatment

Pirzada,

Ali,

Mallah

et al. 2023

Polymers

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Layered double hydroxides (LDHs) with their unique structural chemistry create opportunities to be modified with polymers, making different nanocomposites. In the current research, a novel PET-PAN embedded with Mg-AI-LDH-PVA nanocomposite membrane was fabricated through electrospinning. SEM, EDX, FTIR, XRD, and AFM were carried out to investigate the structure and morphology of the nanocomposite membrane. The characterization of the optimized nanocomposite membrane showed a beadless, smooth structure with a nanofiber diameter of 695 nm. The water contact angle and tensile strength were 16° and 1.4 Mpa, respectively, showing an increase in the hydrophilicity and stability of the nanocomposite membrane by the addition of Mg-Al-LDH-PVA. To evaluate the adsorption performance of the nanocomposite membrane, operating parameters were achieved for Cr(VI) and methyl orange at pH 2.0 and pH 4.0, respectively, including contact time, adsorbate dose, and pollutant concentration. The adsorption data of the nanocomposite membrane showed the removal of 68% and 80% for Cr(VI) and methyl orange, respectively. The process of adsorption followed a Langmuir isotherm model that fit well and pseudo-2nd order kinetics with R2 values of 0.97 and 0.99, respectively. The recycling results showed the membrane’s stability for up to five cycles. The developed membrane can be used for efficient removal of pollutants from wastewater.

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“…The kinetic studies shows that the reaction follows a pseudo second order model and the equilibrium isotherms best fit to the Langmuir model. The thermodynamic studies show that the adsorption was spontaneous, endothermic and favorable [78].…”

Section: Chromiummentioning

confidence: 99%

Removal of metal ions using Chitosan based electro spun nanofibers: A review

Joseph¹,

Jacob²,

Nair³

et al. 2021

Nanosystems: Phys. Chem. Math.

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Chitosan is a promising environmentally-friendly polymer with a wide range of applications in biological, medical and water treatment fields. Recent research in chitosan-based electro spun nanofibers has led to the very cost-effective and efficient removal of toxic metal ions from solutions that are extremely important in today's pollution-ridden world. Nanofiber fabrication of chitosan blends can easily be done by the novel electrospinning technique. Because of their high adsorption capability, metal chelation ability, nontoxicity, biocompatibility, biodegradability, hydrophilicity, and cost effectiveness, chitosan-based nanofibers have seen rapid growth in water treatment applications. This review outlines the ability of electrospinning produced chitosan-based nanofibers to remove toxic metals. The primary goal of this review is to provide current information on various chitosan blend nanofibers that may be useful in water purification, as well as to encourage further research in this area.

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Development of Nanofibers Composed of Chitosan/Nylon 6 and Tannin/Nylon 6 for Effective Adsorption of Cr(VI)

Cited by 25 publications

References 69 publications

Nanofibrous Membranes for Low-Concentration CrVI Adsorption: Kinetic, Thermodynamic and the Influence on ZFL Cells Viability

Nanofibrous Membranes for Low-Concentration CrVI Adsorption: Kinetic, Thermodynamic and the Influence on ZFL Cells Viability

Development of Novel PET-PAN Electrospun Nanocomposite Membrane Embedded with Layered Double Hydroxides Hybrid for Efficient Wastewater Treatment

Removal of metal ions using Chitosan based electro spun nanofibers: A review

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