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Title:Removal of neodymium ions from aqueous solution by magnetic nanoparticles : magistrsko delo
Authors:Ambrož, Ana (Author)
Ban, Irena (Co-mentor)
Luxbacher, Thomas (Mentor) More about this mentor... New window
Files:.pdf MAG_Ambroz_Ana_2021.pdf (2,51 MB)
MD5: 0AB92D880FB17462DF214207B190248C
Work type:Master's thesis/paper (mb22)
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:This work is focused on the synthesis and characterization of surface-functionalized γ-Fe2O3-NH4OH@SiO2(APTMS) nanoparticles, their applications, and performance for Nd3+ removal from aqueous solutions, with an emphasis on the characterization of MNPs and Nd(NO3)3•6H2O. The γ-Fe2O3 nanoparticles were obtained by the co-precipitation method, stabilized with ammonia solution, and functionalized by SiO2 and APTMS. Neodymium nitrate hexahydrate (Nd(NO3)3•6H2O) used in aqueous solution was synthesised from neodymium oxide (Nd2O3) powder. The thermal behaviour and stability of the magnetic nanoparticles and Nd(NO3)3•6H2O was studied with thermogravimetric analysis (TGA) in O2, N2, and air atmosphere. Transmission electron microscopy (TEM) images were obtained in order to analyse the particle morphology and measure the size distribution of the nanoparticles. The hydrodynamic diameter of particles and the zeta potential were measured to determine the stability of particles in the solution. ATR-FTIR spectroscopy was used to confirm the functionalization of the magnetic nanoparticles and the adsorption of Nd3+ ions. The effect of the REE adsorption on the MNPs was studied by comparing the sample’s UV-Vis absorption spectra. The laboratory testing and analysis of the results indicate promising applications for the removal of the REE from aqueous solutions with magnetic nanoparticles. However, the coating of the MNP core by SiO2(APTMS) is inefficient for the removal of Nd3+ ions.
Keywords:Magnetic nanoparticles, Rare earth elements, Neodymium, Adsorption, Zeta potential, UV-Vis spectroscopy
Year of publishing:2021
Place of performance:Maribor
Publisher:[A. Ambrož]
Number of pages:VII, 57 f.
COBISS_ID:61711875 New window
Categories:KTFMB - FKKT
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License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:12.04.2021

Secondary language

Title:Odstranjevanje neodimijevih ionov iz vodne raztopine z magnetnimi nanodelci
Abstract:Magistrsko delo zajema sintezo in karakterizacijo površinsko funkcionaliziranih γ-Fe2O3-NH4OH@SiO2(APTMS) nanodelcev ter njihovo uporabo za odstranjevanje Nd3+ ionov iz vodnih raztopin. Poudarek dela je na karakterizaciji sintetiziranih magnetnih nanodelcev in Nd(NO3)3•6H2O. Magnetni γ-Fe2O3 nanodelci so bili pridobljeni z metodo koprecipitacije, stabilizirani z raztopino amoniaka in funkcionalizirani s SiO2 in z APTMS. V vodni raztopini smo, kot vir redkozemeljskih ionov, uporabili neodimijev nitrat heksahidrat Nd(NO3)3•6H2O, sintetiziran iz neodimovega oksida (Nd2O3). Termično obnašanje ter stabilnost magnetnih nanodelcev in Nd(NO3)3•6H2O smo preučevali s termogravimetrično analizo (TGA) v O2, N2 in zračni atmosferi. Morfološko strukturo in velikostno porazdelitev sintetiziranih magnetnih nanodelcev smo analizirali s transmisijsko elektronsko mikroskopijo (TEM). Za določitev stabilnosti magnetnih nanodelcev v raztopini smo jim izmerili hidrodinamični premer in zeta potencial. Funkcionalizacijo magnetnih nanodelcev ter adsorpcijo Nd3+ ionov smo potrdili z ATR-FTIR spektroskopijo. Učinek adsorpcije Nd3+ na magnetne nanodelce smo preučevali s primerjavo absorpcijskih spektrov vzorcev. Laboratorijski eksperimenti in analize rezultatov obetajo številne aplikacije za odstranjevanje redkozemeljskih elementov iz raztopin z magnetnimi nanodelci. Vendar je v primeru odstranjevanja Nd3+ ionov iz vodne raztopine namesto SiO2(APTMS) prevleke jedra magnetnih nanodelcev primernejša in učinkovitejša drugačna funkcionalizacija.
Keywords:magnetni nanodelci, redkozemeljski elementi, neodim, adsorpcija, zeta potencial, UV-Vis spektroskopija


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