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Naslov:Odstranjevanje organskih polutantov iz vode s poroznimi polielektroliti
Avtorji:ID Trkulja, Vita (Avtor)
ID Krajnc, Peter (Mentor) Več o mentorju... Novo okno
ID Paljevac, Muzafera (Komentor)
Datoteke:.pdf UN_Trkulja_Vita_2022.pdf (2,08 MB)
MD5: 609C4AAE794E4E0EC70AAA65E55671BA
 
Jezik:Slovenski jezik
Vrsta gradiva:Diplomsko delo/naloga (mb11)
Tipologija:2.11 - Diplomsko delo
Organizacija:FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Opis:V diplomskem delu z naslovom Odstranjevanje organskih polutantov iz vode s poroznimi polielektroliti smo sintetizirali vzorce poliakrilne kisline z različnimi stopnjami zamreženosti. Zanimalo nas je, kakšen vpliv ima zamreženost polimernega materiala na njegove adsorptivne lastnosti. Monolite poliakrilne kisline smo pridobili s postopkom polimerizacije kontinuirne faze emulzije z visokim deležem notranje faze. Za pripravo smo uporabili monomer akrilne kisline, zamreževalo N,N' – metilenbisakrilamid, deionizirano vodo, surfaktant Triton X – 405, natrijev hidroksid in iniciator amonijev persulfat. Dodali smo tudi toluen, ki je predstavljal notranjo fazo emulzije, in redoks iniciator N,N,N',N' – tetrametilenetilendiamin. Ker ob dodatku natrijevega hidroksida nastane sol akrilne kisline, smo enega izmed monolitov sintetizirali brez dodatka, saj nas je zanimalo kakšen vpliv ima to na sposobnosti adsorpcije. Reakcija, ki je potekla, je bila prosta verižna radikalska polimerizacija kontinuirne faze emulzije z visokim deležem notranje faze tipa olje v vodi. Kot končne produkte smo dobili monolite z naslednjimi stopnjami zamreženosti: 10,9 mol%, 18,5 mol%, 25,0 mol% in 30,6 mol%. En monolit smo sintetizirali s 9,8 mol% zamreženostjo in brez dodatka natrijevega hidroksida. Preden smo izvedli karakterizacijo, smo vzorce očistili v Soxhletovem aparatu, kjer smo ekstrahirali nezreagirane reaktante. Po čiščenju smo monolite shranili v metanolu, pred samo izvedbo meritev absorpcije pa smo metanol zamenjali z deionizirano vodo, saj smo meritve izvajali z vodnimi raztopinami barvil. Ugotovili smo, da ima takšen material veliko boljše sposobnosti adsorpcije za barvilo metilen modro kot metiloranž. Del materiala smo posušili, ker smo meritve izvajali pri suhih in mokrih vzorcih. Rezultati kažejo, da je adsorpcija za barvilo metilen modro boljša pri mokrih vzorcih kot pri suhih.
Ključne besede:poliakrilna kislina, adsorptivne lastnosti, metiloranž, metilen modro, emulzija, poliHIPE
Leto izida:2022
Izvor:Maribor
PID:20.500.12556/DKUM-82569 Novo okno
Datum objave v DKUM:21.09.2022
Število ogledov:49
Število prenosov:8
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:KTFMB - FKKT
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Skupna ocena:(0 glasov)
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Licence

Licenca:CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
Začetek licenciranja:25.08.2022

Sekundarni jezik

Jezik:Angleški jezik
Naslov:Removal of organic pollutants from water using porous polyelectrolytes
Opis:In the diploma thesis entitled Removal of organic pollutants from water using porous polyelectrolites, samples of polyacrilyc adic with different degrees of crosslinking were synthesized. We were interested in the influence the crosslinking of the polymer material has on the adsorption properties. Monolithic polyacrylic acids were obtained by polymerization of a continuous phase of an emulsion with a high internal phase. For the preparation we needed acrylic acid as the monomer, N,N' – methylenbisacrylamide as the crosslinker, deionized water, surfactant Triton X – 405, sodium hydroxide and the initiator ammonium persulfate. We also added toulene, which represented the internal phase of the emulsion, and redox initiator N,N,N′,N′-tetramethylethylenediamine. Since an acrylic acid salt is formed when sodium hydroxide is added, we syntesized one of the monolits whithout the addition, as we were interested in what effect it has on the adsorption capability. The reaction that took place was a free chain radical polymerization of the continuous phase of an emulsion with a high internal phase of the oil-in-water type. As final products we optained monolyths with the following degrees of crosslinking: 10,9 mol%, 18,5 mol%, 25,0 mol% and 30,6 mol%. We synthesised one monolith with a crosslinking degree of 9,8 mol% without the addition of sodium hydroxide. Before performing the characterization, the samples were purified in a Soxhlet apparatus, where the non-reacted reactants were extracted. After cleaning the monolith was stored in methanol and before the absorption measurments were performed, the methanol was replaced with deionized water, since the measurments were performed with aqueous solutions of the dyes. We found that such a material has much better adsorption capabilities for the dye methylen blue than methyl orange. Part of the material was dried because the measurments were observed on dry and wet samples. The results show that adsorption for methylene blue is better for wet samples than for dry samples.
Ključne besede:polyacrylic acid, adsorptive properties, methyl orange, methylen blue, emulsion, poliHIPE


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