Application of polyethylenimine-coated magnetic nanocomposites for the selective separation of Cs-enriched clay particles from radioactive soil

Kim, June-Hyun; Kim, Sung-Man; Yoon, In-Ho; Kim, Ilgook

doi:10.1039/d0ra03426f

Cited by 11 publications

(6 citation statements)

References 36 publications

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“…In addition, the obtained composite exhibited negative zeta potential values in a wide range of solution pH (i.e., ∼5 to ∼11). Unlike other previous studies, the composite containing GA-PEI moieties revealed positive zeta potential values mainly due to the presence of an amine-rich structure. − For this study, the decrement of zeta potential, including the presence of negative zeta potential values, could be due to the combination between the hydroxy/amines-mixed structure of GA-PEI polymer and the MgFe 2 O 4 @SiO 2 NPs.…”

Section: Resultscontrasting

confidence: 61%

“…Usually, the cross-linking reaction of PEI using GA as a cross-linker is mainly proposed via route 1. Several studies reported that the successful syntheses of the composites composed of GA-cross-linked PEI system provided the final products containing amine-rich structures (i.e., primary, secondary, and tertiary amines). ,− Importantly, the findings from these studies motivated us to select this composite system for adsorption of 2,4-D since we expected to take advantage of the presence of these amines for use as binding sites for the 2,4-D molecule. However, the selected synthetic condition in this study probably provided the GA-PEI polymer possessing mixed functional groups (i.e., hydroxy and amines) since several characterization results (i.e., FTIR, NMR, and functional group analyses) indicated not only the presence of amines but also the existence of hydroxy groups in the composite.…”

Section: Resultsmentioning

confidence: 99%

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Silica-Coated Magnesium Ferrite Nanoparticles/Glutaraldehyde-Cross-Linked Polyethylenimine Composite Adsorbent for Ultrahigh Remediation of 2,4-Dichlorophenoxyacetic Acid

Hoijang,

Kunakham,

Manokruang

et al. 2023

ACS Appl. Nano Mater.

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The emerging contaminant 2,4-dichlorophenoxyacetic acid (2,4-D) has been shown to have harmful effects on the environment and human health. These contaminants present a critical challenge in water remediation. Herein, a magnetic composite composed of silica-coated magnesium ferrite nanoparticles and glutaraldehyde-cross-linked polyethylenimine polymer (i.e., MgFe2O4@SiO2/GA-PEI composite) was synthesized to use as an effective adsorbent for the removal of 2,4-D. The successful preparation of the MgFe2O4@SiO2/GA-PEI composite using the optimal synthesis condition was confirmed through XRD, TGA-DTG, FTIR, zeta potential analysis, solid-state 13C NMR, TEM, SEM, EDS, VSM, and organic functional group tests. The adsorption behavior of 2,4-D by this composite was systematically investigated. The results showed that the MgFe2O4@SiO2/GA-PEI composite exhibited not only pH-dependent adsorption behavior but also an ultrahigh adsorption capacity (∼1631 mg g–1) for 2,4-D. The efficient adsorption of 2,4-D is due to the large numbers of functional groups (i.e., hydroxy and amines) in the obtained composite. Furthermore, the electrostatic interaction between the composite and 2,4-D molecules significantly influenced the adsorption behavior. The reusability test indicated that the MgFe2O4@SiO2/GA-PEI composite revealed the effective adsorption of 2,4-D after five adsorption–desorption cycles. This newly designed heterogeneous magnetic hybrid composite provides a unique foundation to perform ultrahigh removal capacity, easy separation, and reusability for harmful pesticide 2,4-D in water remediation.

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Section: Resultscontrasting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Silica-Coated Magnesium Ferrite Nanoparticles/Glutaraldehyde-Cross-Linked Polyethylenimine Composite Adsorbent for Ultrahigh Remediation of 2,4-Dichlorophenoxyacetic Acid

Hoijang,

Kunakham,

Manokruang

et al. 2023

ACS Appl. Nano Mater.

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“…The elevated isoelectric point also means that more ion exchange occurs between nano-Fe 3 O 4 and the coated polymer, which results in magnetic composites with more functional groups. This significantly broadens the applicability of nano-Fe 3 O 4 [56][57][58].…”

Section: Nano-fe 3 O 4 Particle Preparationmentioning

confidence: 96%

Preparation and Application of Magnetic Composites Using Controllable Assembly for Use in Water Treatment: A Review

Zhao,

Liu,

et al. 2023

Molecules

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The use of magnetic composites in wastewater treatment has become widespread due to their high flocculating characteristics and ferromagnetism. This review provides an analysis and summary of the preparation and application of magnetic composites through controllable assembly for use in wastewater treatment. The applications of magnetic composites include the treatment of dye wastewater, heavy metal wastewater, microalgae suspensions, and oily wastewater. Additionally, the recycling and regeneration of magnetic composites have been investigated. In the future, further research could be focused on improving the assembly and regeneration stability of magnetic composites, such as utilizing polymers with a multibranched structure. Additionally, it would be beneficial to explore the recycling and regeneration properties of these composites.

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“…Polyethylenimine was used to stabilize spherical magnetic iron (Fe 3 O 4 ) particles (average size, 10 nm) by Kim et al [57] who then demonstrated the ability of these nanomaterials to connect to and remove clay particles from a soil suspension. The clay particles examined in this case demonstrated a strong efficiency for radioactive cesium ( 137 Cs) ions.…”

Section: Surface Modification Of Magnetic Nanoparticlesmentioning

confidence: 99%

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

Govan

2020

Magnetochemistry

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Water resources are of extreme importance for both human society and the environment. However, human activity has increasingly resulted in the contamination of these resources with a wide range of materials that can prevent their use. Nanomaterials provide a possible means to reduce this contamination, but their removal from water after use may be difficult. The addition of a magnetic character to nanomaterials makes their retrieval after use much easier. The following review comprises a short survey of the most recent reports in this field. It comprises five sections, an introduction into the theme, reports on single magnetic nanoparticles, magnetic nanocomposites containing two of more nanomaterials, magnetic nanocomposites containing material of a biologic origin and finally, observations about the reported research with a view to future developments. This review should provide a snapshot of developments in what is a vibrant and fast-moving area of research.

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Application of polyethylenimine-coated magnetic nanocomposites for the selective separation of Cs-enriched clay particles from radioactive soil

Abstract: Selective separation of Cs-enriched fine particles from contaminated soil using Fe3O4-PEI nanocomposites and a mesh filter.

Cited by 11 publications

References 36 publications

Silica-Coated Magnesium Ferrite Nanoparticles/Glutaraldehyde-Cross-Linked Polyethylenimine Composite Adsorbent for Ultrahigh Remediation of 2,4-Dichlorophenoxyacetic Acid

Silica-Coated Magnesium Ferrite Nanoparticles/Glutaraldehyde-Cross-Linked Polyethylenimine Composite Adsorbent for Ultrahigh Remediation of 2,4-Dichlorophenoxyacetic Acid

Preparation and Application of Magnetic Composites Using Controllable Assembly for Use in Water Treatment: A Review

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

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