20.500.12556/DKUM-85149 Modifikacija hidro-oglja pridobljenjega s hidrotermalno karbonizacijo za uporabo v procesu adsorpcije diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje Modification of hydrochar produced by hydrothermal carbonization for the adsorption application 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. 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. kemijska modifikacija hidro-oglje hidrotermalna karbonizacija adsorpcija metilen modro odstranjevanje onesnažil chemical modification hydro-char hydrothermal carbonization adsorption methylene blue pollutant removal true true false [P. Završki] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2023-08-20 22:41:15 2023-09-06 10:43:34 2023-09-28 03:05:39 0000-00-00 00:00:00 2023 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF ( 54 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66.046.562:666.1.053.65(043.2) 166028547 diplomsko_delo_Patricija_2023_koncna_verzija.pdf diplomsko_delo_Patricija_2023_koncna_verzija.pdf 1 3DE9A62C7CEAB862A5F247FB6CAF93B7 f90bf02b9621f3f8a5c842b8857cd8bedc28e63b925be2aba1dab556b4e6d8c3 f6196f41-53ab-11ee-8ecf-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=172321 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0