Abstract:
Die Erfindung betrifft einen Kern-Hülle-Partikel (31, 61, 87), umfassend einen eine Anzahl von magnetischen Nanopartikeln (33, 91) enthaltenden Kern (35, 71, 89), sowie eine den Kern (35, 71, 89) umschließende, als eine Monolage (39, 67) ausgebildete Hülle (37, 69, 93), wobei die Hülle (37, 69, 93) eine hydrophile Matrix (43) bildende Matrix-Moleküle (41, 63) sowie eine Anzahl verschiedener funktionalisierter Moleküle (45, 65) umfasst, und wobei die funktionalisierten Moleküle (45, 65) derart in die Matrix (43) integriert sind, dass die Hülle (37, 69, 93) mit einer dreidimensionalen Käfigstruktur (47, 73, 76, 77, 78) zur selektiven Bindung von metallischen Kationen (83) ausgebildet ist. Des Weiteren betrifft die Erfindung ein Verfahren zur Abtrennung von metallischen Kationen (63) aus einer Flüssigkeit (65), bei welchem entsprechende Kern-Hülle-Partikel (31, 61, 87) eingesetzt werden.
Abstract:
The present invention relates to a magnetic nanoparticle comprising: a) a core containing a ferromagnetic material; b) an outer coating containing a mixture of a lipophilic compound and a hydrophilic compound. The outer coating of the above particle makes the nanoparticle stable in water and, simultaneously, capable of adsorbing/emulsifying large amounts of hydrophobic/lipophilic compounds. The present invention further relates to a process for the preparation of the above- mentioned particles as well as their use in the removal of hydrocarbons from solid or liquid environments and metal ions from contaminated water (wastewater).
Abstract:
Biogenic activated carbon compositions disclosed herein comprise at least 55 wt% carbon, some of which may be present as graphene, and have high surface areas, such as Iodine Numbers of greater than 2000. Some embodiments provide biogenic activated carbon that is responsive to a magnetic field. A continuous process for producing biogenic activated carbon comprises countercurrently contacting, by mechanical means, a feedstock with a vapor stream comprising an activation agent including water and/or carbon dioxide; removing vapor from the reaction zone; recycling at least some of the separated vapor stream, or a thermally treated form thereof, to an inlet of the reaction zone(s) and/or to the feedstock; and recovering solids from the reaction zone(s) as biogenic activated carbon. Methods of using the biogenic activated carbon are disclosed.
Abstract:
A method for the production of particles by reacting functional groups on the surface of non-magnetic porous particles with functional groups on the surface of magnetic particles to form a covalent bond, to obtain particles supplemented with magnetic particles covalently bound to the outer part of said particles. Advantages include an increased binding capacity.
Abstract:
Biogenic activated carbon compositions disclosed herein comprise at least 55 wt% carbon, some of which may be present as graphene, and have high surface areas, such as Iodine Numbers of greater than 2000. Some embodiments provide biogenic activated carbon that is responsive to a magnetic field. A continuous process for producing biogenic activated carbon comprises countercurrently contacting, by mechanical means, a feedstock with a vapor stream comprising an activation agent including water and/or carbon dioxide; removing vapor from the reaction zone; recycling at least some of the separated vapor stream, or a thermally treated form thereof, to an inlet of the reaction zone(s) and/or to the feedstock; and recovering solids from the reaction zone(s) as biogenic activated carbon. Methods of using the biogenic activated carbon are disclosed.
Abstract:
The invention concerns a particle for recovering an anion from an aqueous solution comprising a magnetic material associated with a silica based layer forming a magnetic microparticle with a silica based surface, and a layered double hydroxide deposited on the surface of the microparticle. The invention further concerns a method for manufacturing a magnetic particle comprising mixing a magnetic microparticle with a silica based surface in an aqueous solution at about pH 7 with a dispersion of layered double hydroxide at about pH 7 to obtain a mixture, and ultrasonicating the mixture for depositing the layered double hydroxide on the surface of the microparticle. In addition, the invention concerns various uses of the particle.
Abstract:
Biogenic activated carbon compositions disclosed herein comprise at least 55 wt% carbon, some of which may be present as graphene, and have high surface areas, such as Iodine Numbers of greater than 2000. Some embodiments provide biogenic activated carbon that is responsive to a magnetic field. A continuous process for producing biogenic activated carbon comprises countercurrently contacting, by mechanical means, a feedstock with a vapor stream comprising an activation agent including water and/or carbon dioxide; removing vapor from the reaction zone; recycling at least some of the separated vapor stream, or a thermally treated form thereof, to an inlet of the reaction zone(s) and/or to the feedstock; and recovering solids from the reaction zone(s) as biogenic activated carbon. Methods of using the biogenic activated carbon are disclosed.