Naslov
PHOTOCATALYTIC DEGRADATION OF OXYTETRACYCLINE IN WATER BY N-TIO2 PHOTOCATALYST UNDER VISIBLE IRRADIATION

Autori
Papac, Josipa ; Kovačić, Marin ; Kljajić, Katarina ; Piškor, Dorotea ; Žener, Boštjan ; Lavrenčić Štangar, Urška ; Kušić, Hrvoje ; Lončarić Božić, Ana ;

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
XIII Meeting of Young Chemical Engineers-Book of Abstracts / Dejanović, Igor ; Vrsaljko, Domagoj ; Žižek, Krunoslav - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2020, 83-83

Skup
XIII. susret mladih kemijskih inženjera (SMLKI 2020)

Mjesto i datum
Zagreb, Hrvatska, 20.02.2020. - 21.02.2020

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
Photocatalysis, Oxytetracycline, nitrogen doped titania, biodegradability, toxicity

Sažetak
Oxytetracycline (OTC), a wide spectrum antibiotic, is a pharmaceutical of emerging concern (CEC) in the environment. The appearance of OTC, due to incomplete removal in municipal wastewater treatment plants, has led to antibiotic-resistant bacteria in environment. Advanced oxidation processes, especially photocatalysis, are perspective solutions for the removal of pharmaceuticals from waste waters. However, from an economic and ecological point of view, it is important to develop photocatalysts that can utilize visible radiation of the solar spectrum. In this work photocatalytic activity of nitrogen doped titania (N-TiO2), as well as reference photocatalyst Aeroxide P25 (TiO2-P25) were investigated for the degradation of OTC in water. In the present work N-TiO2 was prepared by a sol- gel synthesis and powder samples were characterized with X-Ray diffraction (XRD), specific surface area (BET) as well as with scanning electron microscopy (SEM). In the research N-TiO2 has shown higher adsorption capacity under lower pH values. With the addition of hydrogen peroxide at pH 4, the photocatalytic activity of N-TiO2 has improved remarkably. The investigation of the effects of radical scavengers has revealed an improvement of photocatalytic activity in the presence of iodide, an electron scavenger. The photocatalytic activity of N-TiO2 was not affected significantly by model inorganic and organic matrices, while the complex inorganic and organic matrices have shown a synergistic effect towards removal efficiency. During the investigated duration of photocatalytic treatment, the treated wastewater could be characterized as toxic towards bacteria Vibrio fischeri and partially biodegradable, indicating the necessity to extend photocatalytic treatment time.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti

POVEZANOST RADA