An Ultrasensitive Upconversion Fluorescence Aptasensor …

In this study, we developed an efficient method based on magnetic Fe3O4-modified graphene oxide (MNPs@GO) along with aptamer-functionalized upconversion nanoparticles (UCNPs) for Staphylococcus aureus detection. MNPs@GO are prepared using aptamer-functionalized MNPs and GO by means of π-π stacking interaction. In the absence of …

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Magnetic Separation and Enrichment of Fe–Ti Oxides from …

It is estimated that Fe–Ti oxide production may reach 5.835 metric tons per day (5.835 mtpd) with a magnetic content of 97.50%, starting from 100 mtpd of black sands. ... Thus, the magnetic separation and enrichment of Fe–Ti oxides from iron titaniferous coastal sands exploitation should allow the commercial valorization of these resources ...

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Fe-MOFs/graphene oxide-derived magnetic nanocomposite …

Nowadays, MOFs have been combined with magnetic oxides to increase their magnetic separation effects and renewable properties, e.g. Fe 3 O 4 @MIL-101 [33], and Fe 3 O 4 @ZIF-8-PSS [34], while this method is usually complex and costly to operate. Interestingly, through changing the organic structure of Fe-MOFs which can be easily attacked by ...

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Iron extraction from copper slag by additive-free activation …

The magnetic separation results of reduced products obtained at 1150 °C were shown in Fig. 9 (a). A concentrate with Fe content of 72.86 % and Fe recovery of 82.57 % was obtained by magnetically separating the reduced product from CS. ... An iron oxide film was formed on the particle surface in the OCS-1100 °C due to the migration of Fe ...

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Iron oxide-clay mineral association in Brazilian oxisols: A magnetic

The high-gradient magnetic separation showed good separation for some soils, as indicated by color differentiation and iron oxide segregation between magnetic and nonmagnetic fractions. Soils that showed a somewhat low surface area for the iron oxides associated with high phosphate adsorption were poorly separated by HGMS.

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Low-Field Magnetic Separation of Monodisperse …

We show that magnetite (Fe 3 O 4) particles of a critical size (20 nm) can be removed from solution at very low field gradients (<100 T/m) and present evidence that aggregation, caused by the high field gradients at the …

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High-gradient magnetic separation of colloidal uranium oxide …

The separation of uranium oxide (UO 2) particles from soil-surrogate particles in aqueous suspensions was achieved using filtration enhanced by a magnetic field.Enhanced attraction of paramagnetic UO 2 colloids to a ferromagnetic stainless-steel filter placed in a strong magnetic field arises because of the positive magnetic susceptibility of the particles and the …

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High-gradient magnetic separation of colloidal uranium oxide …

The separation of uranium oxide (UO2) particles from soil-surrogate particles in aqueous suspensions was achieved using filtration enhanced by a magnetic field. Enhanced attraction of paramagnetic UO2 colloids to a ferromagnetic stainless-steel filter placed in a strong magnetic field arises because of the positive magnetic susceptibility of the particles and the high-gradient …

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Magnetic Nanocomposites Based on Iron Oxides as Catalysts …

To obtain magnetically separable carriers, silicon oxide and aluminum oxide are used, with magnetic nanoparticles being synthesized in the pores of these oxides due to the …

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Optimization of magnetic separation process for iron …

magnetic separation has proved to be an op ti mal method to separate and recover iron from steel slag. After magnetic separation, the recovered magnetic iron (M-Fe) particles can be fed back to BOF, E AF or sintering plants for blast furnaces, depending on their grain size and Fe gradel' ", Moreover, during

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Recovery of iron oxide from power plant fly ash by magnetic separation …

Power plant fly ash, a high-volume waste product of pulverized coal combustion, contains a magnetic fraction which can be easily separated and has a high market potential. The fly ash from most of the U.S. bituminous coals contains 15 to 20 weight percent iron oxides, 50% or more of which can be recovered by dry magnetic separation as a high density fraction.

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Pharmacokinetics of magnetic iron oxide nanoparticles for …

In the recent years magnetic iron oxide nanoparticles (MNPs) have been intensively developed and widely adopted for a range of biomedical applications such as tumors imaging (MRI) [1, 2], hyperthermia [3, 4], drug delivery [5, 6], gene therapy and magnetic separation of cells or biomolecules [8, 9].

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A magnetic separation method for isolating and …

Herein, we developed magnetic iron-oxide-loaded LNPs (IOLNP) that allow separation of LNP–corona complexes from biological media through magnetic separation. This technology enables a rapid and selective method to separate LNP–corona complexes and enables in-depth characterization of the BMC while maintaining the particle integrity.

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Magnetic Graphene Oxide Nanocomposites for …

miRNA separation. Using miR-29a as a model, we demonstrated the effectivebinding of miR-29a to the magnetic graphene oxide (GO) composites at an optimal concentration of 1.5 mg/mL, followed by a simple separation using magnetic forces. Additionally, the addition of 5.0 M urea enhanced the miRNA recovery.

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Shaping iron oxide nanocrystals for magnetic …

Here, we report on the study of the magnetophoretic mobility of octapod-shaped nanocrystals, which we relate to stoichiometry, quality and elongation in the 〈111〉 direction of these cubic structures.

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Kinetics of Aggregation and Magnetic Separation of Multicore Iron Oxide

In this work, we have studied field-induced aggregation and magnetic separation—realized in a microfluidic channel equipped with a single magnetizable micropillar—of multicore iron oxide nanoparticles (IONPs) also called "nanoflowers" of an average size of 27 ± 4 nm and covered by either a citrate or polyethylene (PEG) monolayer having a thickness of …

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Direct Affinity Ligand Immobilization onto Bare …

We investigated magnetic monoclonal antibody (mAb) separation based on bare iron oxide nanoparticles (BION) functionalized with an engineered Protein A ligand (rSpA) as an alternative to the conventional but limited Protein …

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Magnetic Separation

Conventional magnetic separation is to separate minerals according to their natural magnetism. In addition, in some cases, in order to improve the efficiency of separation, it is possible to change the magnetism of minerals or take some special methods to make the mineral separation more effective, such as magnetization roasting and magnetic separation, magnetic …

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Magnetic separation of nucleic acids from various …

Magnetic nanobeads can be applied to the magnetic separation of nucleic acids which can be used for diagnosing infectious and genetic diseases of patients. In this study, core-shell structured silica-coated iron oxide (Fe3O4@SiO2) nanobeads with a core size distribution of 40–50 nm and a shell thickness of ∼ 10 nm were synthesized and applied to the magnetic …

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Effective Gold Recovery from Near-Surface Oxide Zone …

High content of gold in near-surface oxide zones above the gold ore deposit could be recovered using cyanidation. However, restricting the use of cyanide in mines has made it difficult to recover gold within the oxide zone. In this study, we investigated an application of the reductive microwave roasting and magnetic separation (RMR-MS) process for the effective gold recovery …

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Functionalized magnetic nanoparticles for the separation …

Magnetic separation has become a very popular separation and purification method for biological samples over the recent years. Amongst the materials added to the nanoparticles core to adsorb the target, perhaps the polymers are the most popular and versatile. ... The superparticles were iron oxide magnetic nanoparticles coated by silica (Fe 3 O ...

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Efficient separation of iron elements from steel slag based on magnetic …

The magnetic separation of MgFe 2 O 4 from reformed steel converter slag was performed using dry magnetic separation ... The experimental equipment and steps are shown in Fig. 1. 100 g of slag powder was weighed and placed in a magnesium oxide crucible. It was then placed in a muffle furnace (MoSi 2 resistance heating) ...

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Kinetics of Aggregation and Magnetic Separation of Multicore Iron Oxide

In this work, we have studied field-induced aggregation and magnetic separation-realized in a microfluidic channel equipped with a single magnetizable micropillar-of multicore iron oxide nanoparticles (IONPs) also called "nanoflowers" of an average size of 27 ± 4 nm and covered by either a citrate or polyethylene (PEG) monolayer having a thickness of 0.2⁻1 nm …

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Magnetic iron oxide nanoparticles: An emerging threat for …

Magnetic iron oxide nanoparticles (Fe x O y NPs, mainly Fe 3 O 4 and γ-Fe 2 O 3) are nanomaterials ubiquitously present in aquatic, terrestrial, and atmospheric environments, with a high prevalence and complex sources.Over the past decade, numerous reports have emerged on the presence of exogenous particles in human body, facilitated by the rapid development of …

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Application of magnetic separation for oil spill …

absorbents [18]. The use of iron oxide magnetic nanopar-ticles as nano adsorbents has led way to a new class of magnetic separation strategies for water treatment [19–21]. Magnetic iron oxide nanoparticles material showed an effi-cient, reliable, inexpensive, and environmentally friendly technique in hydrocarbons recovery from water [9,22].

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Magnetic separation techniques in sample preparation for …

Magnetic separation is usually gentle and nondestructive to biological analytes such as proteins or peptides, and even large protein complexes which tend to be broken up in process of traditional column chromatography may remain active. ... The first controlled preparation of magnetic iron oxide MNPs was carried out by Massart under alkaline ...

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Alumina Extraction from Red Mud by Magnetic Separation …

Magnetic separation of iron oxide from red mud. About 0.5 g of red m ud was mixed with 100 mL of . aquademine and stirred for 3 h. The solid that at tached . to the magnetic bar was collected.

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Magnetic Graphene Oxide Nanocomposites for …

The process involves the formation of an miRNA-magnetic graphene oxide complex by incubating the magnetic graphene oxide with synthetic miR-29a oligonucleotides for 5 min. Subsequently, the complex is …

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A Review of Direct Reduction–Magnetic Separation Process …

The effectiveness of thermal treatment and magnetic separation as an upgrading strategy for obtaining ferronickel from nickel laterite with varying composition and experimental conditions is assessed. ... Wei Y, Li B, Wang H, Ma B, Wang C (2016) Chloridization and reduction roasting of high-magnesium low-nickel oxide ore followed by magnetic ...

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Kinetic and Parametric Analysis of the Separation …

In this work, we investigate, for the first time, the magnetic separation of 20 nm and 30 nm SPIONs dispersed in an aqueous medium at relatively low concentrations (as low as 0.5 g·L −1) using our custom, …

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