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Title:Sinteza in uporaba maghemitnih nanodelcev funkcionaliziranih s polisaharidom za adsorpcijo elementov redkih zemelj : magistrsko delo
Authors:ID Rantaša, Matjaž (Author)
ID Simonič, Marjana (Mentor) More about this mentor... New window
ID Fras Zemljič, Lidija (Comentor)
ID Plohl, Olivija (Comentor)
Files:.pdf MAG_Rantasa_Matjaz_2022.pdf (4,13 MB)
MD5: C4DCD9A9CA5F49C3669F61EDD475673C
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Magistrsko delo zajema sintezo magnetnih maghemitnih nanodelcev (MND), njihovo površinsko funkcionalizacijo s polisaharidom hondroitin sulfatom (HS) in raziskavo adsorpcije neodimovih (III) ionov (Nd3+) na magnetne nanoadsorbente. Namen magistrske naloge je bil ustvariti stabilne adsorbente, ki bi služili za vezavo in nadaljnjo regeneracijo elementov redkih zemelj (REE) iz vodnih raztopin. Magnetne nanoadsorbente smo karakterizirali s Fourierjevo transformirano infrardečo spektroskopijo na oslabljeni totalni odboj (ATR-FTIR), termogravimetrično analizo (TGA), dinamičnim sipanjem laserske svetlobe (DLS), X-žarkovno fotoelektronsko spektroskopijo (XPS), rentgensko praškovno difrakcijo (XRD), transmisijsko elektronsko mikroskopijo (TEM) in masno spektrometrijo sekundarnih ionov z analizatorjem na čas preleta (ToF-SIMS). Izvedene so bile magnetne meritve, meritve zeta potenciala, meritve skupnega organskega ogljika (TOC), naredili smo polielektrolitsko titracijo HS. Adsorpcijo nevezanega Nd3+ v supernatantu smo po odstranitvi magnetnih nanoadsorbentov merili z UV-VIS spektroskopijo. Tekom meritev smo preverjali vpliv kontaktnega časa, pH delovne raztopine in vpliv mase uporabljenega nanoadsorbenta. V tem magistrskem delu so zbrani podatki vseh sintez in funkcionalizacij, ki so bile izvedene. Podrobno so razloženi rezultati karakterizacij, podana je diskusija adsorpcije z vsemi slikami, grafi in tabelami, ki so nastale med izvajanjem eksperimentalnega dela. Rezultati kažejo, da se na funkcionalizirane MND adsorbirajo Nd3+, vendar sama metoda UV-VIS ni primerna za meritve adsorpcije v danem koncentracijskem območju delovnih raztopin in določitev adsorpcijske kapacitete.
Keywords:maghemitni nanodelci, hondroitin sulfat, neodim, adsorpcija, UV-VIS spektroskopija
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[M. Rantaša]
Year of publishing:2022
Number of pages:1 spletni vir (1 datoteka PDF (XI, 72 f.))
PID:20.500.12556/DKUM-82489 New window
UDC:661.865.7.081.3:621.318.1(043.2)
COBISS.SI-ID:121280771 New window
Publication date in DKUM:09.09.2022
Views:833
Downloads:274
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:22.08.2022

Secondary language

Language:English
Title:Synthesis and use of maghemite nanoparticles functionalized with polysaccharide for the adsorption of rare earth elements
Abstract:This master thesis covers the synthesis of magnetic maghemite nanoparticles (MND), their surface functionalization with the polysaccharide chondroitin sulfate (HS) and the investigation of the adsorption of neodymium (III) ions (Nd3+) on magnetic nanoadsorbents. The aim of the master thesis was to create stable adsorbents that would serve for the binding and subsequent recovery/regeneration of rare earth elements (REE) from aqueous solutions. The magnetic nanoadsorbents were characterized by attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), thermogravimetric analysis (TGA), dynamic laser light scattering (DLS), X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and time of flight secondary ion mass spectrometry (ToF-SIMS). Magnetic measurements, zeta potential measurements, total organic carbon (TOC) measurements and polyelectrolyte titration of HS were also performed. The adsorption of unbound Nd3+ in the supernatant was measured by UV-VIS spectroscopy after the removal of magnetic nanoadsorbents. The influence of contact time, pH of the working solution and the mass of the nanoadsorbent used were checked during the measurements. The data of all the syntheses and functionalisations carried out are collected in this master thesis. The results of the characterizations are explained in detail, a discussion of the adsorption is given with all the figures, graphs and tables that were made during the experimental work. The results show that Nd3+ is adsorbed on the functionalized MND, but the UV-VIS method itself is not suitable for adsorption measurements in the given concentration range of the working solutions and in the determination of adsorption capacity.
Keywords:maghemite nanoparticles, chondroitin sulfate, neodymium, adsorption, UV-VIS spectroscopy


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