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master's thesis
Uklanjanje lantanoida (Y, Er, Dy) i aktinoida (U, Th) iz vodenih otopina pomoću nanočestica željeza
Zagreb: University of Zagreb, Faculty of Science, 2022. urn:nbn:hr:217:239190
Lauc, Josipa
University of Zagreb
Faculty of Science
Department of Chemistry

Institutional repository: Repository of the Faculty of Science

Cite this document

Lauc, J. (2022). Uklanjanje lantanoida (Y, Er, Dy) i aktinoida (U, Th) iz vodenih otopina pomoću nanočestica željeza (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:239190

Lauc, Josipa. "Uklanjanje lantanoida (Y, Er, Dy) i aktinoida (U, Th) iz vodenih otopina pomoću nanočestica željeza." Master's thesis, University of Zagreb, Faculty of Science, 2022. https://urn.nsk.hr/urn:nbn:hr:217:239190

Lauc, Josipa. "Uklanjanje lantanoida (Y, Er, Dy) i aktinoida (U, Th) iz vodenih otopina pomoću nanočestica željeza." Master's thesis, University of Zagreb, Faculty of Science, 2022. https://urn.nsk.hr/urn:nbn:hr:217:239190

Lauc, J. (2022). 'Uklanjanje lantanoida (Y, Er, Dy) i aktinoida (U, Th) iz vodenih otopina pomoću nanočestica željeza', Master's thesis, University of Zagreb, Faculty of Science, accessed 22 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:239190

Lauc J. Uklanjanje lantanoida (Y, Er, Dy) i aktinoida (U, Th) iz vodenih otopina pomoću nanočestica željeza [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2022 [cited 2024 November 22] Available at: https://urn.nsk.hr/urn:nbn:hr:217:239190

J. Lauc, "Uklanjanje lantanoida (Y, Er, Dy) i aktinoida (U, Th) iz vodenih otopina pomoću nanočestica željeza", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:217:239190

Metadata
TitleUklanjanje lantanoida (Y, Er, Dy) i aktinoida (U, Th) iz vodenih otopina pomoću nanočestica željeza
Title (english)Removal of Lanthanides (Y, Er, Dy) and Actinides (U, Th) from Aqueous Solution Using Iron Nanoparticles
AuthorJosipa Lauc
MentorSanda Rončević (mentor)
Committee memberSanda Rončević (predsjednik povjerenstva)
Committee memberMirta Rubčić (član povjerenstva)
Committee memberInes Primožič (član povjerenstva)
Committee memberTomislav Jednačak (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Chemistry)
Zagreb
Defense date and country2022-02-21, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
Elementi skupine lantanoida i aktinoida se učestalo koriste u svim modernim granama tehnologije. Zbog velike potražnje te problema u proizvodnji, važno je osmisliti efikasnu metodu za recikliranje ovih elemenata iz vodenih sustava. U te svrhe istražuje se primjena novih materijala poput nanočestica elementarnog željeza. Površina nanočestica može se kemijski modificirati kako bi se osigurala bolja selektivnost u sorpciji. U ovom radu uspoređena je efikasnost sintetiziranih i modificiranih neutralnih nanočestica željeza u sorpciji iona Y, Dy, Er, Th, i U. Za modifikaciju je korištena piridin-2,6-dikarboksilna kiselina (PDCA) u molarnom omjeru Fe:PDCA=2:1. Provedena je simultana adsorpcija odabranih kationa na neutralne i modificirane nanočestice u vodenoj otopini. Pomoću spektrometrije masa uz induktivno spregnutu plazmu (ICP-MS) određena je koncentracija odabranih kationa nakon sorpcije. Uspješnost modifikacije nanočestica potvrđena je metodom infracrvene spektroskopije s Fourierovom transformacijom (FT-IR) te mikroskopijom atomskih sila (AFM). Iz spektara FTIR možemo zaključiti da je PDCA vezana na površinu čestica, a AFM analizom utvrđena je promjena veličine modificiranih nanočestica. Nastale manje čestice s modificiranom površinom pokazuju bolju efikasnost u sorpciji odabranih iona.
Abstract (english)
Rare earth elements and actinides are widely used in modern technologies. Due to high demand and problems in their production, it is quite important to find an effective method for recycling these elements from aqueous systems. Novel approach in this field includes the testing of new materials like zero valent iron nanoparticles (nZVI). To ensure better selectivity, nanoparticles are often surface modified. In this work, efficiency of two kinds of nZVI, i.e. neutral and modified, was examined using solutions of ions Y, Dy, Er, Th, and U. Pyridine-2,6-dicarboxylic acid (PDCA) was used for the surface modification with molar ratio Fe: PDCA=2:1. The simultaneous adsorption of REE (Rare Earth Elements) cations on neutral and functionalized nZVI from aqueous solutions was analysed by inductively coupled plasma mass spectrometry (ICP-MS). In order to confirm the efficiency of surface modification, nZVI particles were analysed with Fourier-transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM). From FT-IR spectra we confirmed bonding of PDCA onto particle surface. AFM analysis showed a decrease in the size of the modified nanoparticles. Smaller modified nanoparticles showed better removal efficiency of selected ions.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:239190
Study programmeTitle: Graduate university studies in chemistry; specializations in: Research programme
Course: Research programme
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2024-02-21
Terms of useLicence In copyright icon
Created on2022-02-24 15:32:54