Spektrometrija masa uz induktivno spregnutu plazmu (ICP-MS) u analizi sorpcije iona lantanoida na nanočesticama željeza

master's thesis

• Title (english): Inductively coupled plasma-mass spectrometry (ICP - MS) in the analysis of lanthanides ion sorption on iron nanoparticles
• Author: Dajana Oreč
• Mentor: Sanda Rončević (mentor)
• Committee member: Sanda Rončević (predsjednik povjerenstva)
• Committee member: Mirta Rubčić (član povjerenstva)
• Committee member: Đani Škalamera (član povjerenstva)
• Committee member: Iva Juranović Cindrić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2022-09-09, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Moderne grane tehnologije sve češće upotrebljavaju elemente skupine lantanoida što za posljedicu ima
njihovu akumulaciju u vodenim sustavima okoliša. Rješavanju problema pristupa se s različitih
stajališta, a u posljednje vrijeme pozornost se obraća na primjenu nanočestica željeza. Ovim je radom
ispitana učinkovitost sorpcije iona odabranih lantanoida (lantan, cerij, samarij, europij, gadolinij)
neutralnim nanočesticama i nanočesticama željeza funkcionaliziranim piridin‒2,6‒dikarboksilnom
kiselinom u molarnom omjeru željeza i liganda 2:1. Uspješnost modifikacije nanočestica potvrđena je
metodom infracrvene spektroskopije s Fourierovom transformacijom (FT‒IR), a morfološke promjene
praćene smanjenjem veličine funckionaliziranih čestica metodom mikroskopije atomskih sila (AFM).
Učinkovitost sorpcije lantanoida neutralnim i modificiranim nanočesticama ispitana je spektrometrijom
masa uz induktivno spregnutu plazmu (ICP‒MS) koja potvrđuje porast sorpcije povećanjem masene
koncentracije lantanoida. Potvrđen je utjecaj oblika i veličine nanočestica pri čemu funkcionalizirane
nanočestice pokazuju učinkovitiju sorpciju. Ispitivanjem sorpcije u nižem koncentracijskom području s
različitim vremenskim trajanjem, potvrđena je prevlast međučestičnog mehanizma pri nižim i
površinske sorpcije pri višim koncentracijama.

Abstract (english)

Modern branches of technology increasingly apply elements of the lanthanoid group, which results in
their accumulation in water systems of the environment. Solving the problem is approached from
different points of view, and recently attention has been paid to the application of iron nanoparticles.
This work tested the sorption efficiency of selected lanthanoid ions (lanthanum, cerium, samarium,
europium, gadolinium) by zero‒valent nanoparticles and iron nanoparticles functionalized with
pyridine‒2,6‒dicarboxylic acid in a 2:1 molar ratio of iron and ligand. The success of the nanoparticle
modification was confirmed by the method of Fourier‒transformed infrared spectroscopy (FT‒IR), and
the morphological changes followed by the decrease in the size of the functionalized particles by atomic
force microscopy (AFM). The efficiency of lanthanoid sorption by neutral and modified nanoparticles
was tested by inductively coupled plasma mass spectrometry (ICP‒MS), which confirms the increase in
sorption with increasing mass concentration of lanthanoids. The influence of the shape and size of
nanoparticles was confirmed, with functionalized nanoparticles showing more effective sorption.
Examining sorption in a lower concentration range with different time durations confirmed the
predominance of the interparticle mechanism at lower concentrations and surface sorption at higher
concentrations.

• Keywords: lantanoidi; nanočestice; sorpcija
• Keywords (english): lanthanides; nanoparticles; sorption
• Language: croatian
• URN:NBN: urn:nbn:hr:217:774159
• 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: 2024-09-09
• Created on: 2022-10-20 12:55:40