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Title:Modifikacija hidro-oglja pridobljenjega s hidrotermalno karbonizacijo za uporabo v procesu adsorpcije : diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje
Authors:ID Završki, Patricija (Author)
ID Simonič, Marjana (Mentor) More about this mentor... New window
ID Petrovič, Aleksandra (Mentor) More about this mentor... New window
Files:.pdf diplomsko_delo_Patricija_2023_koncna_verzija.pdf (4,89 MB)
MD5: 3DE9A62C7CEAB862A5F247FB6CAF93B7
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Namen diplomskega dela je bil izboljšati karakteristike oglja in adsorpcijsko kapaciteto oz. učinkovitost s pomočjo različnih modifikacij oglja. S procesom hidrotermalne karbonizacije (HTC) smo proizvedli hidro-oglje iz oljne pogače semen industrijske konoplje, ki še v tovrstne namene ni bila raziskana. Pridobljeno hidro-oglje smo kemijsko modificirali s štirimi različnimi kemijskimi reagenti (KOH, ocetna kislina, alkoholni kis, vinski kis). Kemijski obdelavi je sledila termična obdelava vzorcev (piroliza). Pridobljena aktivna hidro-oglja smo kemijsko karakterizirali, določili funkcionalne skupine na površini oglja, specifično površino ter zeta potencial. Modificirana oglja smo preizkusili v eksperimentih adsorpcije z barvilom metilen modro in določili adsorpcijsko kapaciteto posameznega oglja ter preučili vpliv modifikacije na samo adsorpcijo. Metilen modro se namreč lahko kopiči v ekosistemu in tako povzroča toksične učinke na živali, ljudi in rastline, zato ga je potrebno odstraniti iz odpadnih vod. Vsa modificirana oglja, z izjemo enega vzorca, so bila uspešnejša pri odstranjevanju barvila metilen modro kot nemodificirano oglje, prav zaradi izboljšanih karakteristik in lastnosti, ki so jih povzročile kemijske modifikacije. Rezultati so pokazali, da je najvišjo adsorpcijsko kapaciteto dosegel vzorec modificiran s kalijevo bazo, 52,15 mg/g (100% učinkovitost odstranitve barvila). Najnižjo adsorpcijsko kapaciteto, 8,63 mg/g (16,32 %) je imelo oglje, modificirano z ocetno kislino. Drugo najvišjo kapaciteto, 42,55 mg/g (81,91 %) je imel vzorec modificiran z alkoholnim kisom, sledil mu je vzorec obdelan z vinskim kisom z adsorpcijsko kapaciteto 29,42 mg/g in 57,20 % učinkovitostjo. Presenetljivo pa nemodificirano oglje ni imelo najnižje kapacitete, saj je le-ta znašala 15,24 mg/g (29,33%) in je bila višja od kapacitete oglja modificiranega z ocetno kislino.
Keywords:kemijska modifikacija, hidro-oglje, hidrotermalna karbonizacija, adsorpcija, metilen modro, odstranjevanje onesnažil
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[P. Završki]
Year of publishing:2023
Number of pages:1 spletni vir (1 datoteka PDF ( 54 f.))
PID:20.500.12556/DKUM-85149 New window
UDC:66.046.562:666.1.053.65(043.2)
COBISS.SI-ID:166028547 New window
Publication date in DKUM:06.09.2023
Views:678
Downloads:162
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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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:20.08.2023

Secondary language

Language:English
Title:Modification of hydrochar produced by hydrothermal carbonization for the adsorption application
Abstract:The purpose of the thesis was to improve the characteristic properties of hydro-char and the adsorption capacity or efficiency with the help of different modifications of hydro-char. Using the hydrothermal carbonization (HTC) process, we produced hydro-char from the oil cake of industrial hemp seeds, which has not yet been researched for such purposes. The obtained hydro-chars were chemically modified with four different chemical reagents (KOH, acetic acid, alcoholic vinegar, wine vinegar). The chemical treatment was followed by thermal treatment of samples (pyrolysis). The obtained activated hydro-chars were chemically characterized, the functional groups on the char surface, specific surface area and zeta potential were determined. The modified hydro-chars were tested in adsorption experiments with the methylene blue dye to determine the adsorption capacity of each char and to investigate the effect of the modification on the adsorption itself. Methylene blue can accumulate in the ecosystem and cause toxic effects to animals, humans and plants and should be removed from the wastewater. All modified hydro-chars, except one sample, were more efficient in removing methylene blue dye than unmodified char, precisely because of the improved characteristics and properties caused by the chemical modification. The results showed that the highest adsorption capacity was achieved by the sample modified with KOH, 52,15 mg/g (100 % dye removal efficiency). The lowest adsorption capacity, 8,63 mg/g (16,32 %), was obtained by the hydro-char modified with the acetic acid. The sample modified with alcoholic vinegar had the second highest adsorption capacity of 42,55 mg/g (81,91 %), followed by the sample treated with wine vinegar with an adsorption capacity of 29,42 mg/g and an efficiency of 57,20 %. Surprisingly, the unmodified hydro-char did not have the lowest capacity, which was 15,24 mg/g (29,33 %), higher than the acetic acid modified hydro-char.
Keywords:chemical modification, hydro-char, hydrothermal carbonization, adsorption, methylene blue, pollutant removal


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