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Magneticky modifikované aktivní uhlí a biouhel a jejich využití

Explore the significance of magnetic materials in bioapplications and the diverse properties of magnetic nano- and microparticles. Learn about preparation techniques and examples of applications in various fields. Discover how activated carbons can be converted into magnetic derivatives for effective separation of compounds.

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Magneticky modifikované aktivní uhlí a biouhel a jejich využití

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  1. Magneticky modifikované aktivní uhlí a biouhel a jejich využití Ivo Šafařík, Kateřina Horská, Kristýna Pospíšková, Zdenka Maděrová, Mirka Šafaříková Oddělení nanobiotechnologie Ústav nanobiologie a strukturní biologie CVGZ AVČR České Budějovice ivosaf@yahoo.com www.nh.cas.cz/people/safarik

  2. Types of magnetic nano- and microparticles Multi domain, single domain or superparamagnetic • Magnetite (Fe3O4) • Ferrites (MeO . Fe2O3; Me = Ni, Co, Mg, Zn, Mn ...) • Maghemite (-Fe2O3) • Greigite (Fe3S4) • Iron, nickel

  3. Why magnetic materials are so important in bioapplications? They are smart materials!!!! The following typical properties of magnetic materials form the basis of their applications in biosciences and biotechnology

  4. Important properties • Selective separation (removal) of magnetic particles from the system • Targeting (navigation) of magnetic particles to desired area using magnetic field

  5. Important properties • “keeping” magnetic particles in appropriate area using magnetic field • Heat formation in alternated magnetic field

  6. Important properties • Increasing of contrast during MRI • Peroxidase-like activity

  7. Important properties • Hardening of biological structures (chiton teeth) • Navigation in magnetic field

  8. Important properties • Magnetic labeling of biologically active compounds • Magnetization of biological diamagnetic materials

  9. Examples of of magnetic nano- and microparticlesapplications • From molecular biology to environmental technologies • Manipulation of microliters as well as million of liters • Manipulation in suspension systems • Both separation and non-separation techniques are important

  10. Preparation of magnetic particles for bioapplications • Precipitation • High-temperature reactions • Reactionsin steric environments • Sol-gel reactions • Decompositionof organometallic precursors • Polyol methods • Biosynthesis Laurent S, Forge D, Port M, Roch A, Robic C, Elst LV, Muller RN: Magnetic iron oxide nanoparticles: Synthesis, stabilization, vectorization, physicochemical characterizations, and biological applications. Chem Rev 2008, 108(6):2064-2110.

  11. Postmagnetization • Chemical precipitation procedures • High temperature treatment • Ferrofluid treatment • Microwave assisted procedures • Mechanochemistry • Encapsulation

  12. Review paper

  13. Conversion Of Activated Carbons (Charcoal) Into Their Magnetic Derivatives Using Chemical Precipitation Procedures

  14. Conversion Of Activated Carbons (Charcoal) Into Their Magnetic Derivatives By High Temperature Treatment

  15. Conversion Of Activated Carbons (Charcoal) Into Their Magnetic Derivatives By Encapsulation

  16. Application Of Magnetic Activated Carbons (Charcoal) For The Separation Of Organic Compounds

  17. Application Of Magnetic Activated Carbons (Charcoal) For The Separation Of Inorganic Compounds

  18. Microwave assisted synthesis of magnetically responsive biochar high pH Biochar Microwave oven Magnetic biochar Ferrous sulfate Fe2+ + H2O → Fe(OH)2 3Fe(OH)2 + ½O2Fe3O4 + 3H2O microwave Magnetic properties are caused by the deposition of magnetic iron oxides nano- and microparticles on the biochar surface using the developed procedure

  19. Safarik,I., Horska,K., Pospiskova,K., Maderova,Z., Safarikova,M.: Microwave Assisted Synthesis of Magnetically Responsive Composite Materials. IEEE Trans. Magn. 49 (1) (2013) 213-218

  20. Magnetic derivative of biochar

  21. Adsorption of acridine orange

  22. Sirofloc

  23. COST Action (do 25. 3. 2016)

  24. MC

  25. ありがとうございます!!!!! ivosaf@yahoo.com www.nh.cas.cz/people/safarik

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