Volume 10, Issue 2, 2020, 5266 - 5272 ISSN 2069-5837 ...

magnetic polymer [45] respectively. It is further increased to 99 mg g-1 by MCM-41 modified magnetite nanoparticles [46]. Li and his coworkers used magnetically separable cyclodextrin–chitosan modified graphene oxide (CCGO) for removal of Cr (VI) from aqueous solution. The surface hydroxyl groups and magnetic cyclodextrin–chitosan

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Quantitative evaluation of local pulmonary distribution of ...

The results indicate that: (i) multiple-dose administrations show lower variations in TiO 2 content (ng mesh −1) for sections of each lobe; (ii) TiO 2 appears to be deposited more in the right caudal and accessory lobes located downstream of the administration direction of NP suspensions, and less so in the right middle lobes, irrespective of ...

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Constructing magnetic Pt-loaded BiFeO 3 nanocomposite for ...

Moreover, the strong magnetic property of the Pt-BFO nanocomposite was helpful in the particle separation along with its great recyclability. The radical scavenger test indicated that hole (h +), hydroxyl (·OH) radical, and hydrogen peroxide (H 2 O 2) were the main oxidative species for the Pt-BFO photodegradation of MG. Finally, the Pt-BFO ...

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Magnetite: Mineral information, data and localities.

Jacobsite-Magnetite Series. Magnesioferrite-Magnetite Series. Magnetite is an important, strongly magnetic iron ore, along with hematite. Nanoinclusions of magnetite crystals cause the iridescence of Rainbow obsidian (Nadin, 2007). Extremely thin layers of 200-nm octahedral crystals of magnetite give some basalt surfaces an iridescent sheen (Nadin, 2007).

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Recovery enhancement of magnetite fines in magnetic …

recovery of magnetite particles in a low intensity magnetic. separator, different size fractions of magnetite, alone and. mixed with the same size quartz particles at a 0.5–0.5 ratio. were ...

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Characterization and Analysis of the Carbonation Process ...

In order to avoid slippage, phase separation, and fracture phenomena [26,27], a mixing geometry, dealing with a 37.15 mm diameter helical ribbon and a 46.62 mm diameter cup, was employed, calibrated according to the principles of the mixing rheometry technique . Finally, creep measurements were performed in both rheometers by applying different ...

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Developments in the physical separation of iron ore ...

Figure 9.2 shows a permanent magnetic drum separator, which consists mainly of a permanent magnet system, a rotating drum, a separating chute, a feed tank, and a flushing pipe. For magnetite separation, the magnetic field intensity on the surface of the drum is between 0.1 and 0.4 T.However, for other applications, the intensity may reach as high as 0.8 T.

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Enhanced Photocatalytic Reduction of Cr(VI) by Combined ...

magnetic separation by doping Fe3O4, the photocatalytic performance could be further enhanced by modifying the shape of Fe 3 O 4 to increase the active surface area [29]. In addition, modifying

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Perspective of Fe3O4 Nanoparticles Role in Biomedical ...

Since the magnetic spins of octahedral and tetrahedral sites are opposite in direction and create two sublattice sites, thus, based on these two sublattice directions, the magnetite structure is ferrimagnetic [4, 49–51].Various exchange interactions can occur between iron ions in both intra- and intertetrahedral and octahedral sites due to presence of these different crystal sites [53, 54].

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Aluminium (EHC 194, 1997)

2.3.2 Separation and concentration A fractionation procedure for aluminium species in water using an 0.22 µm size filter has been proposed by van Benschoten & Edzwald (1990). Total reactive aluminium is determined in the unfiltered, acidified sample.

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Design of Super-Paramagnetic Core–Shell Nanoparticles for ...

Controlling the nature and transfer of excited states in organic photovoltaic (OPV) devices is of critical concern due to the fact that exciton transport and separation can dictate the final performance of the system. One effective method to accomplish improved charge separation in organic electronic materials is to control the spin state of the photogenerated charge-carrying species.

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Synthesis, characterization, applications, and challenges ...

Liquid phase methods. These methods are simple and allow the preparation of magnetic NPs with rigorous control of size and shape. Homogeneous precipitation reactions are used to synthesize uniform sizes that involve the separation of the nucleation and growth of the nuclei. 24 One of the classic models for synthesis is proposed by LaMer and Dinegar 37 in which the nuclei are allowed to slowly ...

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(PDF) Cellulosic Bionanocomposites: A Review of ...

The properties of cellulosic fibers are strongly influenced by many factors e.g., chemical. composition, internal fiber structure, microfibril angle, cell dimensions and defects, which differ from ...

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US3676337A - Process for magnetic separation - Google Patents

Process for separating colloidal and sub-colloidal ceramic magnetic components and paramagnetic components from a slurry (or other carrier) by passing the slurry through a column containing a magnetic material, as a magnetic grade stainless steel wool. The steel wool is subjected to a d-c magnetic field sufficient in magnitude to effect magnetization to saturation and above and provides a ...

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Improvement the Quality of Egyptian Kaolin for Industrial ...

The magnetic minerals that are removed are dominantly hematite and yellowish iron enriched anatase along with some ilmenite, magnetite, and biotite. The magnetic separation process was described by Iannicelli (1976) who was one of the first to advocate the use of magnetic separation in order to brighten kaolin clays. The

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Influence of transition metal doping on the structural ...

Magnetic-ion-doped TiO 2 with room-temperature ferromagnetism is one kind of promising diluted magnetic semiconductors (DMS). It has been widely studied due to its potential applications in spintronics [1–3].Many efforts have been made to understand the mechanism of ferromagnetism (FM) in magnetic-ion-doped TiO 2.The most important point for industrial …

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Separation, upgrading, and mineralogy of placer …

12%The black sand magnetite is a raw material to produce iron and steel. High content magnetite in the top meter beach sands of the north-west of El-Burullus Lake of Egypt is separated and mineralogically and geochemically investigated. Magnetite content obtained by laboratory techniques varies between 2.92 and 0.11 wt%, with 1.15 wt% average. It represents about one third of …

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Perspectivas y aplicaciones reales del grafeno después de ...

Perspectivas e aplicações reais do grafeno após 16 anos de sua descoberta. 1 Centro de Investigación en Ciencia e Ingeniería de Materiales (CICIMA), San José 11501 2060, Costa Rica. 2 Escuela de Química, Universidad de Costa Rica, San José, 11501 2060, Costa Rica. A 16 años del gran descubrimiento del grafeno los focos de atención ...

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Synthesis, characterization, applications, and challenges ...

Iron oxide NPs due to their strong magnetic properties were used first in biology and then in medicine for the magnetic separation of biological products and cells as well as magnetic guidance of particle systems for site-specific drug delivery. 72,115 The surface chemistry, size, and charge of magnetic particles influence biodistribution of ...

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Stepwise extraction of valuable components from red mud ...

The feasibility of an integrated technological route for comprehensive utilization of red mud was verified in this study. Valuable components in the mud, including Fe2O3, Al2O3 and SiO2 were stepwise extracted by magnetic separation and sulfuric acid leaching from reduced red mud, and meanwhile TiO2 was enriched in the leaching residue.

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Nanotechnology and in situ remediation: a review of the ...

REVIEW REVISÃO. Nanotechnology and in situ remediation: a review of the benefits and potential risks. A nanotecnologia e a remediação in situ: uma revisão dos benefícios e riscos em potencial. Barbara Karn I; Todd Kuiken II; Martha Otto I. I U.S. Environmental Protection Agency. Office of Research and Development, NCER, 8722F, 1200 Pennsylvania Ave. NW, Washington, DC 20460 …

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Heavy media separation with dense Magnetite | LKAB …

Principles of heavy media gravity separation. Heavy media gravity separation means separating products with different densities. Both magnetite and water are used to make a slurry on which one product will float (the product with a lower density than the slurry) and in which the other product will sink (the product with a higher density than the slurry).

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Facile method to synthesize magnetic iron oxides/TiO 2 ...

In this point, magnetic separation provides a convenient method to removing pollutants and recycling magnetized species by applying an appropriate external magnetic field. Therefore, immobilization of TiO 2 on magnetic iron oxide NPs has been investigated intensely due to its magnetic separation properties [28–32]. Indeed, the study of core ...

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Ag nanoparticles immobilized on new magnetic alginate ...

Over the last years, magnetic nanoparticles (e.g. Fe 3 O 4) have been broadly studied as a suitable compound for the separation of compounds in numerous biological and …

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Iron Ore Technical Centre - alsglobal.com

The DTR test generates the weight recovery/magnetic iron, or proportion of the deposit which is magnetite and the likely grade of concentrate at a given grind size. The DTR test is in effect a pilot run on each part of the deposit. The integrated team of chemists, mineralogists and magnetite specific metallurgists at the ALS Iron Ore Technical

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Carbon Fibres: Production, Properties and Potential Use ...

Carbon fibers or carbon fibres are fibers about 5–10 micrometres in diameter and composed mostly of carbon atoms. Carbon fibers have several advantages including high stiffness, high tensile strength, low weight, high chemical resistance, high temperature tolerance and low thermal expansion. These properties have made carbon fiber very ...

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Razvoj novih pametnih metalnih nanomaterijala na bazi ...

The subject of this study was the synthesis, characterization and testing of titanium (IV) oxide nanoparticles (TiO2-NPs) and their lanthanum (La3+), iron (Fe3+) and vanadium (V3+) dopants for the photocatalytic and microbiological activity, as well as their comparison with the catalytic activity of the tested commercial TiO2 (Degussa P-25® and anatase nanoparticles, 99.9 %, Alfa Aesar ...

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Basaltic glass-ceramic: A short review - ScienceDirect

The role of iron oxide in crystal nucleation is attributed to the Fe 3+ grouping in the glass structure which, upon heating between 650 and 800 °C, reacts with oxygen and forms the magnetite (FeO. Fe 2 O 3 ), which is the first phase to crystallize and acts …

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Characterization and Pre-Concentration of Low-Grade ...

A vanadium-titanium magnetite concentrate with 1.14% V2O5, 22.22% TiO2, 42.51% Fe and a rough concentrate of ilmenite with 16.05% TiO 2, 20.77% Fe were obtained from

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Use of Ultrafiltration Membranes for the Separation of ...

Since TiO 2 particles usually have diameter of 20-40 nm, membrane filtration is necessary for efficient solid-liquid separation (Doll & Frimmel, 2005;Malato et al. 2009;Xi & Geissen, 2001;Zhang et ...

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Study on Separation of Iron from Waste Slag of Pyrite ...

After further treatment with chlorinated segregation-magnetic separation, the iron content in the recovered slag can reach 83%. After the treatment, sulphur content in the concentrate was reduced significantly and gangue materials, such as SiO 2, Al 2 O 3, and TiO 2, were reduced effectively. This paper is mainly focused on the results of ...

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Photodegradation of Binary Azo Dyes Using Core-Shell Fe3O4 ...

Abstract. Photodegradation has emerged as an environmentally friendly method of decomposing harmful dyes in wastewater. In this study, core-shell Fe 3 O 4 /SiO 2 / TiO 2 nanospheres with magnetic cores were obtained from synthesised magnetic Fe 3 O 4 nanoparticles through the precipitation method, the surface of the magnetic Fe 3 O 4 nanoparticles was coated with a silica (SiO 2) layer by ...

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Facile synthesis and defect optimization of 2D-layered ...

XRD analysis illustrated the crystalline size of CTAB capped TiO 2, MoS 2 @TiO 2 and L-Cysteine capped MoS 2 @TiO 2 as 12.6, 11.7 and 10.2 nm, respectively. The bandgap of …

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Diclofenac degradation by heterogeneous photocatalysis ...

On the other hand, the Fe 3 O 4 /H-TiO 2 composite increases the diclofenac photodegradation due to the synergistic effect [10–12, 20–22]. The photoactivity at the same degradation conditions for TiO 2, H-TiO 2 and Fe 3 O 4 is lower, when they were tested individually. The Fe 3 O 4 /H-TiO 2-U composite was the second-best option in efficacy.

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Advancement of oil/water separating materials: merits and ...

With the increase of offshore drilling of oil, production and transportation the chances of oil spillage has enormously increased. Oil spillages have a catastrophic impact on our aquatic environment and ecosystem. In the last few years development of special wettable materials for oil-water separation has received tremendous research and industrial interest.

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DEVELOPMENT OF A MAGNETIC HYDROCYCLONE …

titanium-bearing minerals were separated using the novel magnetic hydrocyclone separation technique. Therefore, this type of magnetic hydrocyclone has potential to produce significant reduction in the processing time, thus saving energy and the running cost in an appropriate industrial application economically and effi-ciently.

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Removal Polyacrylamide from Oil Recovery Wastewater by γ ...

Polyacrylamide is of concern in oil recovery wastewater treatment because of its persistence and environment effects. A concept is proposed to synthesize γ-Fe2O3 particles with magnetic functionalization for polyacrylamide removal from aqueous media. Magnetic particles were synthesized by the sol-gel method, using NH4HCO3 and FeSO4·7H2O.

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US3754713A - Separation of magnetizable particles - Google ...

US3754713A US00125149A US3754713DA US3754713A US 3754713 A US3754713 A US 3754713A US 00125149 A US00125149 A US 00125149A US 3754713D A US3754713D A US 3754713DA US 3754713 A US3754713 A US 3754713A Authority US United States Prior art keywords magnetic titanium separation gravel separator Prior art date Legal status (The legal status is an …

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Magnetic semiconductor photocatalysts for the degradation ...

The morphological properties determine the photocatalytic activity of TiO 2-based nanocomposites.Sample labeling, the amount of Fe 3 O 4 to TiO 2, molar ratio of TEOS to Fe 3 O 4 used during the preparation procedure, as well as the magnetic properties of obtained photocatalysts and their BET surface area are given in Table 1, Table 2.The surface area for pure TiO 2 _TBT was 91 m 2 g −1.

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