scholarly journals Application of broadband alternating current magnetic susceptibility to the characterization of magnetic nanoparticles in natural materials

2013 ◽  
Vol 118 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Kazuto Kodama
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Nanoparticles ◽  
Alternating Current ◽  
Natural Materials

Confined Brownian motion of individual magnetic nanoparticles on a chip: Characterization of magnetic susceptibility

2006 ◽  
Vol 89 (14) ◽  
pp. 142511 ◽  
Author(s):  
Kim van Ommering ◽  
Jeroen H. Nieuwenhuis ◽  
Leo J. van IJzendoorn ◽  
Bert Koopmans ◽  
Menno W. J. Prins
Keyword(s):  
Magnetic Susceptibility ◽  
Brownian Motion ◽  
Magnetic Nanoparticles

Alternating current magnetic susceptibility of ferronematics: The case of high concentration of magnetic nanoparticles

2020 ◽  
Vol 500 ◽  
pp. 166331
Author(s):  
Katarína Zakutanská ◽  
Natália Tomašovičová ◽  
Nándor Éber ◽  
Tibor Tóth-Katona ◽  
Jozef Kováč ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Nanoparticles ◽  
Alternating Current ◽  
High Concentration

scholarly journals Adsorption Studies on Magnetic Nanoparticles Functionalized with Silver to Remove Nitrates from Waters

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1757
Author(s):  
Yesica Vicente-Martínez ◽  
Manuel Caravaca ◽  
Antonio Soto-Meca ◽  
Miguel Ángel Martín-Pereira ◽  
María del Carmen García-Onsurbe
Keyword(s):  
Magnetic Nanoparticles ◽  
Nitrate Content ◽  
Adsorption Efficiency ◽  
Experimental Conditions ◽  
Dependent Behavior ◽  
Before And After ◽  
Naoh Solution ◽  
High Concentrations ◽  
Interference Studies

This paper presents a novel procedure for the treatment of contaminated water with high concentrations of nitrates, which are considered as one of the main causes of the eutrophication phenomena. For this purpose, magnetic nanoparticles functionalized with silver (Fe3O4@AgNPs) were synthesized and used as an adsorbent of nitrates. Experimental conditions, including the pH, adsorbent and adsorbate dose, temperature and contact time, were analyzed to obtain the highest adsorption efficiency for different concentration of nitrates in water. A maximum removal efficiency of 100% was reached for 2, 5, 10 and 50 mg/L of nitrate at pH = 5, room temperature, and 50, 100, 250 and 500 µL of Fe3O4@AgNPs, respectively. The characterization of the adsorbent, before and after adsorption, was performed by energy dispersive X-ray spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller analysis and Fourier-transform infrared spectroscopy. Nitrates can be desorbed, and the adsorbent can be reused using 500 µL of NaOH solution 0.01 M, remaining unchanged for the first three cycles, and exhibiting 90% adsorption efficiency after three regenerations. A deep study on equilibrium isotherms reveals a pH-dependent behavior, characterized by Langmuir and Freundlich models at pH = 5 and pH = 1, respectively. Thermodynamic studies were consistent with physicochemical adsorption for all experiments but showed a change from endothermic to exothermic behavior as the temperature increases. Interference studies of other ions commonly present in water were carried out, enabling this procedure as very selective for nitrate ions. In addition, the method was applied to real samples of seawater, showing its ability to eliminate the total nitrate content in eutrophized waters.

Investigation of the Naturally Occurring Magnetic Nanoparticles in Crude Oil by AC Magnetic Susceptibility Experiment

2021 ◽  
Author(s):  
Paulo S. Moscon ◽  
Marcio S. Pessoa ◽  
Maria C. R. Rodrigues ◽  
André L. Alves ◽  
Erico M. M. Flores ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Nanoparticles ◽  
Crude Oil ◽  
Ac Magnetic Susceptibility ◽  
Naturally Occurring

scholarly journals Production and characterization of chitooligosaccharides by the fungal chitinase Chit42 immobilized on magnetic nanoparticles and chitosan beads: selectivity, specificity and improved operational utility

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5529-5536
Author(s):  
Peter E. Kidibule ◽  
Jessica Costa ◽  
Andrea Atrei ◽  
Francisco J. Plou ◽  
Maria Fernandez-Lobato ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Industrial Application ◽  
Chitosan Beads

Chitin-active enzymes are of great biotechnological interest due to the wide industrial application of chitinolytic materials.

Curcuminoids-conjugatiked multicore magnetic nanoparticles: design and characterization of a potential theranostic nanoplatform

2021 ◽  
pp. 160448
Author(s):  
Evelyn C.S. Santos ◽  
Jamili A. Cunha ◽  
Marcel G. Martins ◽  
Bianca M. Galeano-Villar ◽  
Richard J. Caraballo-Vivas ◽  
...  
Keyword(s):  
Magnetic Nanoparticles
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