Development of a highly efficient selective flocculant based on functionalized <scp>β‐cyclodextrin</scp> toward beneficiation of low‐quality iron ore

Patra, Priyapratim; Patra, Abhay Shankar; Mukherjee, Arunabh; Pal, Sagar

doi:10.1002/pat.5247

Cited by 3 publications

(2 citation statements)

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“…The 1 H NMR spectra of β-CD, NIPAAm, AMPS, MBA, the prepolymer solution (a mixture of all of the starting materials before polymerization), and the hydrogel have been shown in Figure . The peaks corresponding to δ = 4.97 ppm and 3.25 to 3.86 ppm present in the 1 H NMR spectrum of β-CD are due to anomeric protons and other protons (ring protons and −OH protons) of β-CD, respectively . From the 1 H NMR spectrum of NIPAAm, it is observed that the peaks at δ = 1.05 and 3.88 ppm represent H b (−CH 3 protons) and H a (−CH protons) protons, respectively.…”

Section: Resultsmentioning

confidence: 96%

“…The peaks corresponding to δ = 4.97 ppm and 3.25 to 3.86 ppm present in the 1 H NMR spectrum of β-CD are due to anomeric protons and other protons (ring protons and −OH protons) of β-CD, respectively. 40 From the 1 H NMR spectrum of NIPAAm, it is observed that the peaks at δ = 1.05 and 3.88 ppm represent H b (−CH 3 protons) and H a (−CH protons) protons, respectively. The other existing peaks at 5.60 and 6.05 ppm are attributed to the vinylic protons of the NIPAAm molecule.…”

Section: Synthesis and Characterization Of β-Cd-cl-p-(nipaam-co-amps)mentioning

confidence: 99%

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Adsorption of Toxic Cd(II) on an Antibacterial Biopolymeric Gel toward Fabrication of a Gel Electrolyte-Based Supercapacitor Device

Dey,

Roy,

Manna

et al. 2024

Ind. Eng. Chem. Res.

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Both water and energy are extremely crucial in the contemporary world. Hence, cutting-edge technologies to reduce water pollution and to develop sustainable energy storage appliances are two major key areas in recent times. In this context, cadmium pollution is a severe threat to mankind. Herein, a cross-linked β-cyclodextrin (β-CD) hydrogel has been synthesized via grafting and cross-linking of poly(N-isopropylacrylamide) and poly(2-acrylamido-2methylpropane) sulfonic acid on β-CD. The hydrogel is biocompatible, antibacterial, and biodegradable in nature and exhibits excellent pH and thermoresponsive Cd 2+ adsorption efficiency from wastewater. Moreover, this Cd 2+ -adsorbed hydrogel has been found to be efficient as a gel electrolyte in a high-performance asymmetric supercapacitor for energy storage application. The Cd 2+ -adsorbed hydrogel, when used to fabricate a supercapacitor device as a gel electrolyte, demonstrates a higher specific capacitance and a higher energy density of 203.84 F/g and 54.30 Wh/kg, respectively. The developed device is fairly stable even after 5000 cycles and retains 77% charge. The gel-based supercapacitor device is also capable of illuminating red and green light-emitting diodes.

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Section: Resultsmentioning

confidence: 96%

Section: Synthesis and Characterization Of β-Cd-cl-p-(nipaam-co-amps)mentioning

confidence: 99%

Adsorption of Toxic Cd(II) on an Antibacterial Biopolymeric Gel toward Fabrication of a Gel Electrolyte-Based Supercapacitor Device

Dey,

Roy,

Manna

et al. 2024

Ind. Eng. Chem. Res.

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Macromolecular selective flocculant derived from functionalized starch towards beneficiation of low-quality iron ore: Atomistic simulations and experimental studies

Dey

Patra

et al. 2022

Materials Today Communications

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Application of Chitosan and Its Derivatives as Bioflocculants for Iron and Turbidity Removal from Filter Backwash Water

Maćczak

Kaczmarek

Ziegler-Borowska

2023

Water

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The present study aimed to investigate the potential application of chitosan (CS) and its two derivatives, dialdehyde chitosan (DCT) and carboxymethyl chitosan (CMC), as new flocculants in the purification of filter backwash water. The main objective of the work was to remove the disadvantages and inconveniences associated with using synthetic flocculants, mainly based on polyacrylamide, by using biodegradable and non-toxic biopolymer flocculants. The chitosan derivatives were obtained in the process of the chemical modification of this polysaccharide. CS was oxidated with periodate in acetic acid solution to obtain DCT with a degree of substitution (DS) of 44.29%. For the CMC synthesis, after the alkaline activation of chitosan, the solution was treated with monochloroacetic acid (MCA) at 60 °C for 3 h, leading to carboxymethylated chitosan formation with a DS of 49.55%. Characterizations of the flocculants using Fourier transform infrared (FT-IR) spectroscopy, 13C nuclear magnetic resonance (13C NMR) spectroscopy, and an elementary analysis confirmed the successful modification of the chitosan. The morphology and thermal stability of the samples were investigated using scanning electron microscopy (SEM) and a thermogravimetric analysis (TGA), respectively. Moreover, the biopolymer materials were studied in a series of flocculation jar tests for filter backwash water samples collected at a water treatment plant (WTP) in Kutno, Poland. CMC turned out to be a particularly effective agent in an optimal amount of 0.2 mg/L, achieving nearly 99% iron removal and 98.26% turbidity removal efficiency rates, which indicates that chitosan–based materials can be ecological alternatives for polyacrylamide flocculants, effectively removing the impurities of iron ions.

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Development of a highly efficient selective flocculant based on functionalized β‐cyclodextrin toward beneficiation of low‐quality iron ore

Cited by 3 publications

References 14 publications

Adsorption of Toxic Cd(II) on an Antibacterial Biopolymeric Gel toward Fabrication of a Gel Electrolyte-Based Supercapacitor Device

Adsorption of Toxic Cd(II) on an Antibacterial Biopolymeric Gel toward Fabrication of a Gel Electrolyte-Based Supercapacitor Device

Macromolecular selective flocculant derived from functionalized starch towards beneficiation of low-quality iron ore: Atomistic simulations and experimental studies

Application of Chitosan and Its Derivatives as Bioflocculants for Iron and Turbidity Removal from Filter Backwash Water

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