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FeO@SiOcore-shell structured nanoparticles are promising candidates for adsorption of heavy metal ions from waste water due to their high adsorption capacities and feasible recycling process. However, their practical applications have been hindered by the trade-off between the magnetic separation efficiency and durability. In this study, we demonstrated the preparation of amino-functionalized FeO@SiOabsorbents with both high magnetic separation efficiencies and durability in strong acidic environment. Our key strategy was to use a thin but highly protective silica layer by manipulating the sol-gel chemistry. With the protection of a thin but poorly permeable silica shell, the durability of the FeOin strong acid solution was significantly enhanced while its magnetic separation efficiency was maintained. We also demonstrated the adsorption of Cufrom aqueous solution corresponded well with the pseudo-second-order kinetic model and the Langmuir adsorption isotherm. The adsorption capacity can be further improved by coating an additional layer of mesoporous SiOoutside FeO@SiO. The design of highly durable magnetic absorbents without sacrificing the magnetic separation efficiency greatly facilitates the practical applications of magnetic nanoparticles in adsorption of heavy metal ions.
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The separation process is the main stage of recombinant production. With the advancement of nanotechnology and the development of magnetic nanoparticles, these structures are increasingly used in diff...
Magnetic liposomes are shown to release the entrapped dye once modulated by low frequency AC MF. The mechanism and effectiveness of MF application should depend on lipid composition, magnetic nanopart...
Traditional chemical precipitation of phosphates from wastewater is somewhat inefficient because it produces some ultrafine hydroxyapatite particles that are difficult to settle. In this study, magnet...
DNA extraction using magnetic particles (MPs) is a simple and rapid process. MPs directly combine with DNA, thereby facilitating removal of impurities in complex samples by magnetic attraction. Amino-...
A polydopamine magnetic composite (PDA@FeO) was prepared for the extraction of human genomic DNA and characterized by transmission electron microscopy, X-ray diffraction, FT-IR spectrometer, zeta pote...
RATIONALE: Diagnostic procedures, such as magnetic resonance imaging, may help doctors predict a patient's response to treatment and help plan the best treatment. PURPOSE: This clinical tr...
This study is being conducted to improve magnetic resonance imaging (MRI) scans by reducing the time required for imaging. Experience has shown that unpleasant side-effects from magnetic p...
This study is designed to compare a new prototype surgical magnetic drape made with bottom-isolated ferrite magnets to 4 commercially available surgical magnetic drapes.
RATIONALE: New diagnostic procedures, such as 3 Tesla magnetic resonance imaging (MRI), may help find bladder cancer and learn the extent of disease. PURPOSE: This clinical trial is study...
Magnetic anastomosis has been attempted in biliary and intestinal reconstruction. Based on our initial experience, the investigators have successfully utilized magnetic anastomosis for bil...
The measurement of various aspects of MAGNETIC FIELDS.
Waves of oscillating electric and MAGNETIC FIELDS which move at right angles to each other and outward from the source.
Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.
The ability of an element or metallic alloy to allow the passage of ELECTRONS without ELECTRICAL RESISTANCE and expel MAGNETIC FIELDS below a certain threshold temperature called superconducting transition temperature.
A type of MAGNETIC RESONANCE IMAGING that uses only one nuclear spin excitation per image and therefore can obtain images in a fraction of a second rather than the minutes required in traditional MRI techniques. It is used in a variety of medical and scientific applications.