diplomsko delo univerzitetnega študijskega programa I. stopnje
Meta Kočevar (Author), Janja Stergar (Mentor), Irena Ban (Co-mentor)

Abstract

Konvencionalne tehnologije čiščenja vode so v preteklih letih zelo pripomogle k čiščenju odpadnih voda, vendar so vedno večje potrebe po čisti pitni vodi te tehnologije potisnile do njihovih skrajnih meja. Ena izmed rešitev problema čiščenja vode je proces napredne osmoze, ki za svoje delovanje potrebuje gonilno raztopino, ki ustvarja ustrezen osmotski tlak. V sklopu diplomske naloge smo sintetizirali magnetne nanodelce (MND) v mikrovalovni pečici in jih uspešno funkcionalizirali s (poli)akrilno kislino. Preučevali smo, kako vplivata čas in temperatura sinteze na končni osmotski tlak pripravljenih raztopin. Potrdili smo, da tako daljši čas kot tudi višja temperatura pri sintezi pripomoreta k višjemu osmotskemu tlaku raztopine MND. Visoki osmotski tlaki sintetiziranih magentnih nanodelcev nakazujejo, da bi takšne raztopine lahko uporabili kot gonilne raztopine v procesu napredne osmoze. MND smo karakterizirali s Fourierovo transformacijsko infrardečo spektroskopijo (FTIR), termogravimetrično analizo (TGA), dinamičnim sipanjem svetlobe (DLS), rentgensko praškovno difrakcijo (RTG) ter z merjenjem osmotskega tlaka. S pomočjo karakterizacije smo ugotovili, da so sintetizirani nanodelci mešanica goetita in maghemita. V diplomski nalogi so predstavljeni rezultati in meritve vseh opravljenih sintez, kot tudi diskusija rezultatov.

Keywords

magnetni nanodelci;poli(akrilna kislina);mikrovalovna sinteza;napredna osmoza;osmotski tlak;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: [M. Kočevar]
UDC: 544.352.4:[66.091.3:621.318.1](043.2)
COBISS: 130436611 Link will open in a new window
Views: 114
Downloads: 22
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Other data

Secondary language: English
Secondary title: Synthesis of functionalized magnetic nanoparticles with microwave oven for application in forward osmosis
Secondary abstract: Conventional water treatment technologies have made a significant contribution to wastewater treatment over the pase years, but the increasing demand for clean drinking water has pushed these technologies to their limits. One solution to the water treatment problem is the forward osmosis process, which requieres drive solutions to generate the sufficient osmotic pressure. In this work, magnetic nanoparticles were synthesised in a microwave oven and successfully functionalized with poly(acrylic acid). We investigated how the time and temperature of synthesis affect the final osmotic pressure of the synthesised solutions. We confirmed that longer synthesis time and higher synthesis temperature lead to higher osmotic pressure of the magnetic nanoparticle solution. The high osmotic pressures of the synthesised solutions indicate that these solutions could be used as driving solutions in the forward osmosis process. The magnetic nanoparticles were characterised by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), dynamic light scattering (DLS), X – ray diffraction (RTG) and osmotic pressure measurements. The characterization revealed that the synthesised nanoparticles are a mixture of goethite and maghemite. The results and measurements of all the syntheses we performed, as well as a discussion of the results, are presented in the thesis. Graphs and figures are shown to illustrate the work that has been carried out.
Secondary keywords: magnetic nanoparticles;poly(acrylic acid);microwave synthesis;forward osmosis;osmotic pressure;
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages: 1 spletni vir (1 datoteka PDF (X, 41 f.))
ID: 16183451