Magnetic Nanoparticles for Water Purification

Martínez-Boubeta, C.; Simeonidis, Konstantinos

doi:10.1016/b978-0-12-813926-4.00026-4

Cited by 28 publications

(9 citation statements)

References 181 publications

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“…Magnetic nanoparticles (NPs) from the category of iron oxides (e.g., hematite (α-Fe 2 O 3 ), maghemite (γ-Fe 2 O 3 ) and magnetite (Fe 3 O 4 )), due to their multiple features, including biocompatibility and low toxicity, are much more considered in the frame of academic and industrial research for a large number of applications [ 38 ]. These NPs, possessing unique biochemical, magnetic, catalytic, and other specific properties after specific modification, have proven their suitability for environmental protection [ 39 ], water purification [ 40 ], technical use (e.g., in data and energy storage, microwave absorption, and magnetic shielding [ 41 ]) and biomedical applications. Furthermore, the utilization of iron oxide NPs in biomedical applications [ 38 , 42 , 43 , 44 ] is of particular interest for targeted drug delivery, diagnostic magnetic resonance imaging (MRI), magnetic cell separation, tissue repair, hyperthermia, biosensors, etc.…”

Section: Introductionmentioning

confidence: 99%

Pathways to Green Perspectives: Production and Characterization of Polylactide (PLA) Nanocomposites Filled with Superparamagnetic Magnetite Nanoparticles

et al. 2021

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In the category of biopolymers, polylactide or polylactic acid (PLA) is one of the most promising candidates considered for future developments, as it is not only biodegradable under industrial composting conditions, but it is produced from renewable natural resources. The modification of PLA through the addition of nanofillers is considered as a modern approach to improve its main characteristic features (mechanical, thermal, barrier, etc.) and to obtain specific end-use properties. Iron oxide nanoparticles (NPs) of low dimension (10–20 nm) such as magnetite (Fe3O4), exhibit strong magnetization in magnetic field, are biocompatible and show low toxicity, and can be considered in the production of polymer nanocomposites requiring superparamagnetic properties. Accordingly, PLA was mixed by melt-compounding with 4–16 wt.% magnetite NPs. Surface treatment of NPs with a reactive polymethylhydrogensiloxane (MHX) was investigated to render the nanofiller water repellent, less sensitive to moisture and to reduce the catalytic effects at high temperature of iron (from magnetite) on PLA macromolecular chains. The characterization of nanocomposites was focused on the differences of the rheology and morphology, modification, and improvements in the thermal properties using surface treated NPs, while the superparamagnetic behavior was confirmed by VSM (vibrating sample magnetometer) measurements. The PLA−magnetite nanocomposites had strong magnetization properties at low magnetic field (values close to 70% of Mmax at H = 0.2 T), while the maximum magnetic signal (Mmax) was mainly determined by the loading of the nanofiller, without any significant differences linked to the surface treatment of MNPs. These bionanocomposites showing superparamagnetic properties, close to zero magnetic remanence, and coercivity, can be further produced at a larger scale by melt-compounding and can be designed for special end-use applications, going from biomedical to technical areas.

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Section: Introductionmentioning

confidence: 99%

Pathways to Green Perspectives: Production and Characterization of Polylactide (PLA) Nanocomposites Filled with Superparamagnetic Magnetite Nanoparticles

et al. 2021

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“…Maghemite (γ-Fe2O3) has a very similar crystal arrangement to magnetite [69]. Additionally, it is used due to its non-toxicity, and low-cost synthesizing compared to other materials [226].…”

Section: Maghemite (γ-Fe2o3)mentioning

confidence: 99%

“…Their capacity to adhere with As (V) oxy-ions is ascribed both to the adsorption on the structure of maghemite or on the hydrolyzed surface created after the connection with water. Additionally, maghemite NPs may have smaller crystallite sizes and, hence, offer high specific surface area [69]. Homero et al, [233] reported using the concrete/maghemite nanocomposite (CM nano) as a suitable adsorbent for remediation of As(V).…”

Section: Maghemite (γ-Fe2o3)mentioning

confidence: 99%

“…However, magnetism is not the only considered characteristic for their use. The extraordinary surface charge and redox activity characteristics are prominent reasons for their qualification when considering other materials [69]. Herein, the first part of this review will give insight from recent studies on the utilization of magnetic nanomaterials such as zero-valent iron, iron oxides, and spinel ferrites, and their application in water remediation applications and wastewater problems.…”

Section: Introduction To Magnetic Nanoparticlesmentioning

confidence: 99%

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Insight on water remediation application using magnetic nanomaterials and biosorbents

Maksoud

Elgarahy

Farrell

et al. 2020

Coordination Chemistry Reviews

221

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Adsorption to date is the most effective and utilized technology globally to remove several pollutants in wastewater. In this approach, many adsorbents have been synthesized, tested and used for the elimination and separation of the contaminants such as radionuclides, heavy metals, dyes and pharmaceutical compounds both at lab and industrial scale. However, there are many challenges to adsorption processes such as reducing the high cost, through means of separation of suspending adsorbents to be used again, as well as the ease to synthesize. Two methods that have shown promising results and gained significant interest is that of magnetic nanomaterials and biosorbents due to their effective, safe, eco-friendly, low cost and low-energy intensive material properties. Magnetic nanomaterials act as efficient adsorbents due to their ease of removal of contaminants from wastewater using an applied magnetic field but also their advantageous surface charge and redox activity characteristics. On the other hand, biosorbents have a synergistic effect with their efficient adsorption capacity to remove contaminants, high abundance and participation in waste minimization, helping alleviate ecological and environmental problems. This review highlights, discusses and reports on the state-of-the-art of these two promising routes to adsorption and provides indications as to what are the optimum materials for utilization and insight into their efficiency, reusability and practicality for the removal of pollutants from wastewater streams. Some of the main material focuses are zero-valent iron, iron oxides, spinel ferrites, natural and waste-based biosorbents.

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“…Hence, MNPs have the added control of changing the concentration of nanoparticles by the simple use of the magnet. MNPs have been recently reported to be developed for the purification of wastewater [ 19 , 20 , 21 ]. The use of the magnetic field after purification to remove the nanoparticles makes the purification process simpler, cost-efficient, and safe to handle.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis, Characterization and Application of Natural Product Coated Magnetite Nanoparticles for Wastewater Treatment

et al. 2020

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Adsorption of organic pollutants, toxic metal ions, and removal of harmful bacteria can give us clean and pure drinkable water from wastewater resources. Respective magnetite nanoparticles (MNPs) were synthesized using a cheaper and greener way in an open-air environment with the use of crude latex of Jatropha curcas (JC) and leaf extract of Cinnamomum tamala (CT). Characterization of MNPs had been performed by dynamic light scattering (DLS), Ultraviolet-visible (UV-vis) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, powdered X-ray diffraction (XRD), and field emission scanning electron microscope (FE-SEM). The size ranges of the synthesized MNPs were observed in between 20–42 nm for JC-Fe3O4 and within 26–35 nm for CT-Fe3O4 by FE-SEM images. The effect of synthesized magnetic nanoparticles in wastewater treatment (bacterial portion), dye adsorption, toxic metal removal as well as antibacterial, antioxidant, and cytotoxic activities were studied. This purification will lead to an increase in the resources of pure drinking water in the future.

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Magnetic Nanoparticles for Water Purification

Cited by 28 publications

References 181 publications

Pathways to Green Perspectives: Production and Characterization of Polylactide (PLA) Nanocomposites Filled with Superparamagnetic Magnetite Nanoparticles

Pathways to Green Perspectives: Production and Characterization of Polylactide (PLA) Nanocomposites Filled with Superparamagnetic Magnetite Nanoparticles

Insight on water remediation application using magnetic nanomaterials and biosorbents

Green Synthesis, Characterization and Application of Natural Product Coated Magnetite Nanoparticles for Wastewater Treatment

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