Nanokompoziti željezovih i ugljikovih nanočestica za uklanjanje iona Gd3+ iz vodenih otopina

master's thesis

• Title (english): Nanocomposites of iron and carbon nanoparticles in removal of Gd3+ ions from water solutions
• Author: Tin Županović
• Mentor: Ivan Nemet (mentor)
• Committee member: Ivan Nemet (predsjednik povjerenstva)
• Committee member: Jana Pisk (član povjerenstva)
• Committee member: Nikola Cindro (član povjerenstva)
• Committee member: Tomislav Jednačak (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2023-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Gadolinij pripada elementima rijetkih zemalja te je tehnološki važan element. Široka upotreba
gadolinija prouzročila je problem nakupljanja gadolinija u okolišu i njegov utjecaj na živi svijet.
Nanočestice željeza posjeduju sposobnost akumuliranja zagađivača iz okoliša, koja je
poboljšana primjenom ugljikovih nanocjevčica kao nosača za nanočestice željeza. Priređeni su
nanokompoziti ugljika i željeza te su karakterizirani pomoću pretražne elektronske
mikroskopije i mjerenjem magnetsne susceptibilnosti. Spektrometrijom mase uz induktivno
spregnutu plazmu ispitana je adsorpcija kelatno vezanog i ionskog gadolinija na nanočestice
kompozita te je provedena varijacija mase nanokompozita kod adsorpcije gadolinija. Utvrđeno
je da čestice nanokompozita vrlo dobro adsorbiraju gadolinij pri uskom području niskih
koncentracija, a povećanjem koncentracije gadolinija sposobnost adsorpcije čestica značajno
opada.

Abstract (english)

Gadolinium belongs to the rare earth elements (REEs) and is a technologically important
element. The widespread use of gadolinium has caused the problem of gadolinium
accumulation in the environment and its impact on the living world. Iron nanoparticles can
accumulate pollutants from the environment, which is improved by using carbon nanotubes as
a carrier for iron nanoparticles. Carbon and iron nanocomposites were prepared and
characterized using scanning electron microscopy and magnetic susceptibility measurements.
The adsorption of chelated and ionic gadolinium on composite nanoparticles was tested by mass
spectrometry with inductively coupled plasma, and the mass variation of the nanocomposite
during gadolinium adsorption was performed. It was found that nanocomposite particles adsorb
gadolinium very well in a narrow range of low concentrations, and with an increase in
gadolinium concentration, the adsorption capacity of the particles decreases significantly.

• Keywords: gadolinij; ICP-MS; nanočestice željeza; ugljikove nanocjevčice
• Keywords (english): carbon nanotubes; ICP-MS; iron nanoparticles; gadolinium
• Language: croatian
• URN:NBN: urn:nbn:hr:217:919054
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2025-09-28
• Created on: 2023-10-18 12:28:07