1. Hydrothermal co-carbonization of sewage sludge and whey : enhancement of product properties and potential application in agricultureAleksandra Petrovič, Tjaša Cenčič, Lidija Škodič, Sabina Vohl, Lidija Čuček, 2023, original scientific article Keywords: hydrothermal co-carbonization, sewage sludge, cheese whey, product characterisation, potential application
Published in DKUM: 24.02.2025; Views: 0; Downloads: 6
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2. Thermo-kinetic analysis of pyrolysis of thermally pre-treated sewage sludge from the food industryAleksandra Petrovič, Janja Stergar, Lidija Škodič, Neža Rašl, Tjaša Cenčič, Lidija Čuček, Darko Goričanec, Danijela Urbancl, 2023, original scientific article Keywords: thermal pre-treatment, pyrolysis, industrial sewage sludge, thermogravimetric analysis, kinetic analysis, thermodynamic analysis
Published in DKUM: 10.05.2024; Views: 258; Downloads: 15
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3. Effects of ultrasound irradiation on the preparation of ethyl cellulose nanocapsules containing spirooxazine dyeJulija Volmajer Valh, Simona Vajnhandl, Lidija Škodič, Aleksandra Lobnik, Matejka Turel, Bojana Vončina, 2017, original scientific article Abstract: This article presents the influence of low frequency, high intensity ultrasonic irradiation on the characteristics (average size, polydispersity index) of ethyl cellulose nanocapsules encapsulating a photochromic dye. Photochromic nanocapsules were prepared by the emulsion-solvent evaporation method. The acoustic densities entering the system were systematically studied with respect to their abilities to modify and reduce the average sizes and polydispersity indexes of the nanocapsules. Scanning electron microscope, confocal laser microscope, and dynamic light scattering were utilised to characterise the structure, shape, size, and polydispersity of ethyl cellulose photochromic nanocapsules. We were able to tailor the size of the photochromic nanocapsules simply by varying the acoustic densities entering the system. At an acoustic density of 1.5 W/mL and 60 s of continuous irradiation, we were able to prepare an almost monodispersed population of the nanocapsules with an average size of 193 nm.
Keywords: encapsulation, ethyl cellulose microcapsules, nanocapsules
Published in DKUM: 09.08.2017; Views: 1679; Downloads: 420
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4. ČIŠČENJE ODPADNIH TEKSTILNIH VOD Z UV/H 2 O 2 POSTOPKOMLidija Škodič, 2016, master's thesis Abstract: Magistrsko delo prikazuje študijo razbarvanja vodnih raztopin dveh reaktivnih barvil C.I. Reactive Blue 268 (RB268) in C.I. Reactive Blue 4 (RB4) ter nekaterih realnih tekstilnih odpadnih vod z naprednimi oksidacijskimi postopki (AOP) kot so H2O2/UV, Foto-fenton (H2O2/UV/Fe2+), napredni Foto-fenton postopek (H2O2/UV/Fe0). Razbarvanja s H2O2/UV postopki smo uspeli še izboljšati z dodatkom raztopine MnTACN, ki se je do sedaj uporabljala kot katalizator za beljenje bombaža. Rezultati študije kažejo, da že dodatki relativno nizkih koncentracij H2O2, Fe2+ ionov ali železa v prahu ter raztopine MnTACN med AOP postopki, zvišajo razbarvanja nad 90% v zelo kratkem času izvajanja postopka (5-10 min) za raztopine obeh izbranih barvila, kar je pomebno tako iz ekonomskega kot ekološkega vidika.
Ugotovili smo, da so izbrani AOP postopki zelo uspešni za razbarvanje raztopin barvila RB268 in barvilo RB4, čeprav ima barvilo RB268 zelo kompleksno strukturo in večjo molekulsko maso v primerjavi z barvilom RB4. Zaradi uporabe raztopine MnTACN pri AOP postopkih so nas zanimali tudi razgradni produkti, ki pri tem nastanejo. Za določitev razgradnih produktov smo uporabili H2O2/UV postopek ter vodno raztopino barvila RB4, ki je pogosteje uporabljeno.
Izbrani AOP postopki (H2O2/UV/MnTACN) pa niso bili tako zelo učinkoviti pri razbarvanju realnih tekstilnih odpadnih vod. Relativno dobro razbarvanje smo dosegli v primeru realne tekstilne odpadne vode, ki je bila modro obarvana. Za rdeče ter rumenozeleno obarvano realno odpadno vodo pa H2O2/UV/MnTACN postopki niso bili uspešni
Keywords: tekstilna odpadna voda, reaktivna barvila, napredni oksidacijski postopki (AOP), H2O2/UV postopek, foto-fenton, napredni foto-fenton, MnTACN
Published in DKUM: 13.10.2016; Views: 2169; Downloads: 193
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