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Title:Funkcionalizirani magnetni nanodelci za odstranjevanje težkih kovin iz odpadnih vod : diplomsko delo univerzitetnega študijskega programa I. stopnje
Authors:ID Pučnik, Rok (Author)
ID Leitgeb, Maja (Mentor) More about this mentor... New window
ID Primožič, Mateja (Comentor)
ID Vasić, Katja (Comentor)
Files:.pdf UN_Pucnik_Rok_2021.pdf (3,01 MB)
MD5: C94C9D7B2D1D1D4292BE2CAEE0DDACD8
PID: 20.500.12556/dkum/a962c08f-6ea5-4b0f-a424-ab8176e9f50e
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Onesnaževanje površinskih in podzemnih vod s težkimi kovinami postaja svetovni problem, prav zaradi njihovih negativnih učinkov na številne ekosisteme. Za sanacijo kontaminiranih vod se uporabljajo številne separacijske metode, med katerimi spada tudi adsorpcija na različne materiale. Magnetni nanodelci imajo poleg odličnih adsorpcijskih kapacitet tudi magnetne lastnosti, ki se lahko izkoriščajo tako pri adsorpcijskem mehanizmu kot pri končni separaciji delcev iz raztopin. V tem diplomskem delu smo proučevali vpliv zunanjega izmeničnega magnetnega polja na adsorpcijo Cr(VI) iz vodne raztopine z uporabo magnetnih nanodelcev. Pri tem smo uporabljali maghemitne magnetne nanodelce, sintetizirane po koprecipitacijskem postopku, katere smo z mikroemulzijsko metodo funkcionalizirali s hitozanom. Rezultati so pokazali, da je učinkovitost adsorpcije, s 30 mg adsorbenta, bila večja ob prisotnosti zunanjega magnetnega polja (60,39 %) kot v odsotnosti magnetnega polja (41,50 %). Največji adsorpcijski učinek (94,21 %) pa je bil dosežen z uporabo 50 mg magnetnih nanodelcev ob prisotnosti zunanjega magnetnega polja. Raziskovali smo tudi vpliv jakosti generiranega magnetnega polja na učinkovitost odstranjevanja Cr(VI) iz vodne raztopine z uporabo hitozanskih magnetnih nanodelcev. Frekvenco električnega toka po vodniku smo nastavili na 50, 100 in 200 mHz, amplituda pa je bila konstantna (11 000,00 Vpp). 78,73 % učinkovitost je bila dosežena pri 200 mHz, 88,24 % pri 50 mHz in največja 94,21 % pri 100 mHz električnem toku.
Keywords:Krom(VI), odpadne vode, adsorpcija, hitozanski magnetni nanodelci, izmenično magnetno polje.
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[R. Pučnik]
Year of publishing:2021
Number of pages:X, 32 str.
PID:20.500.12556/DKUM-79730 New window
UDC:620.3:628.179.2(043.2)
COBISS.SI-ID:77944579 New window
Publication date in DKUM:22.09.2021
Views:1400
Downloads:90
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
:
PUČNIK, Rok, 2021, Funkcionalizirani magnetni  nanodelci za odstranjevanje  težkih kovin iz odpadnih vod : diplomsko delo univerzitetnega študijskega programa I. stopnje [online]. Bachelor’s thesis. Maribor : R. Pučnik. [Accessed 29 March 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=79730
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:14.08.2021

Secondary language

Language:English
Title:Functionalized magnetic nanoparticles for heavy metals removal from waste water
Abstract:Heavy metal pollution of surface and ground water is becoming a global problem, due to their negative effects on numerous ecosystems. Many different techniques are used in the remediation processes of contaminated water, one of them beeing adsorption on different materials. In addition to excellent adsorption capacities, magnetnic nanoparticles also have magnetic properties, that can be exploited in the adsorption mechanism and in the final stage of particle separation from solutions. The aim of this diploma thesis was to investigate the effect of external alternating magnetic field on the adsorption process of Cr(VI) from aqueous solutions using magnetic nanoparticles. Maghemite nanoparticles, systhesized by the co-precipitation method and then functionalized with chitosan by the microemulzion technique, were used. Results show, that the adsorption efficiency at 30 mg of adsorbent was greater in the presence of external magnetic field (60,39 %) then the absence of said magnetic field (41,50 %). The highest adsorption efficiency (94,21 %) was achieved using 50 mg of magnetic nanoparticles in the presence of external magnetic field. We also investigated the influence of the generated magnetic field on the efficiency of removing Cr(VI) from aqueous solutions using magnetic nanoparticles. The frequency of the electric current through the conductor was set to 50, 100 and 200 mHz, whereas the amplitude remained constant (11 000,00 Vpp). 78,73 % efficiency was archieved at 200 mHz, 88,24 % at 50 mHz and the highest 94,21 % at 100 mHz.
Keywords:Chromium(VI), wastewater, adsorption, chitosan magnetic nanoparticles, alternating magnetic field


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