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Title:Odstranjevanje svinčevih in kromovih ionov iz vodnih raztopin s pomočjo adsorpcije na nanodelce
Authors:ID Masten Gubeljak, Vesna (Author)
ID Lobnik, Aleksandra (Mentor) More about this mentor... New window
Files:.pdf MAG_Masten_Gubeljak_Vesna_2016.pdf (4,51 MB)
MD5: 993D1C1807172C642942BF0AC0DE612A
 
Language:Slovenian
Work type:Master's thesis
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:V magistrskem delu so bili sintetizirani nanodelci po Stöberjevi sol-gel metodi v alkoholnem mediju in amonijakom kot katalizatorjem, pri pH 10-11 in množinskem razmerju prekurzorjev TEOS:APTMS za 1:2 in 1:4. Za karakterizacijo materialov smo uporabili BET metodo za določanje specifične površine, infrardečo spektroskopijo s Fourierjevo transformacijo (FTIR) za določevanje funkcionalnih skupin, rentgensko praškovno difrakcijo (XRD) in presevno elektronsko mikroskopijo (TEM) ter za analizo učinkovitosti odstranjevanja svinčevih ionov (Pb2+) in skupnega kroma (skupni Cr) z AAS metodo. Adsorpcija svinca (Pb2+) in skupnega Cr na funkcionalizirane nanodelce (SiO2@NH2) in funkcionalizirane magnetne nanodelce (MND@SiO2@NH2) se je pokazala kot uspešna metoda za odstranjevanje ionov težkih kovin iz odpadnih voda. Pri velikosti MND@SiO2@NH2 delcev od 9 – 16 nm z debelino prevleke od 2- 5 nm smo odstranili od 95 % do 99 % Pb2+, Cr6+ in skupnega Cr iz modelnih voda. Z R (%) > 95 se sintetizirani material izkazal kot zelo učinkovit tudi pri odstranjevanju Pb2+ in skupnega Cr iz modelne mešanice ionov težkih kovin. Visoko učinkovitost omogoča velika specifična površina delcev in površinska funkcionalizacija z amino skupinami (-NH2).
Keywords:adsorpcija, krom, magnetni nanodelci, nanodelci SiO2, odstranjevanje težkih kovin, odpadne vode, sol-gel sinteza, svinec
Place of publishing:Maribor
Publisher:[V. Masten Gubeljak]
Year of publishing:2016
PID:20.500.12556/DKUM-61071 New window
UDC:628.316.12:66.081.312(043.2)
COBISS.SI-ID:19934998 New window
NUK URN:URN:SI:UM:DK:L7YMPZBU
Publication date in DKUM:05.09.2016
Views:1995
Downloads:248
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
:
MASTEN GUBELJAK, Vesna, 2016, Odstranjevanje svinčevih in kromovih ionov iz vodnih raztopin s pomočjo adsorpcije na nanodelce [online]. Master’s thesis. Maribor : V. Masten Gubeljak. [Accessed 26 March 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=61071
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Secondary language

Language:English
Title:Removal of lead and chromium ions from aqueous solutions by adsorption on nanoparticles
Abstract:The nanoparticles used, were synthesised via Stober's sol-gel method in an alcoholic medium and using ammonia as a catalyst at a pH of 10-11 and the relative abundances of the precursors TEOS:APTMS of 1:2 and 1:4. For characterisation of the prepared material the BET method was used in order to estimated the specific surface area. Additional methods such as Fourier Transform Infrared Spectroscopy (FTIR), X-Ray powder diffraction (XRD) and Transmission Electron Microscopy (TEM). For efficiency analysis of heavy metal ion removal (Pb2+ and Cr total), analysis with AAS spectroscopy were performed. Results show that lead and chrome absorption on functionalised silica nanoparticles (SiO2@NH2) and functionalised magnetic nanoparticles (MNP@SiO2@NH2) is a succesful method of heavy metal ion removal from wastewater. . In the case of MNP@SiO2@NH2 with particle size from 9 to 16 nm with a coating thickness of 2 to 5 nm, between 95 to 99 % of Pb, Cr6+ and total Cr species were removed from model samples. With R values of 99 % for Pb2+ and 96 % for total Cr the synthesised material is very effective at removing Pb2+ and total Cr from a model mixture of heavy metal ions. This is due to the large specific area of the particles and the functionalisation of the surface with amino (-NH2) groups
Keywords:adsorption, chromium ions, heavy metal removal, lead ions, magnetic nanoparticles, SiO2 nanoparticles, sol-gel synthesis, waste water


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