degradation of 7 selected pharmaceuticals (CO3:IL02)
Lev Matoh (Author), Boštjan Žener (Author), Marin Kovačić (Author), Hrvoje Kušić (Author), Iztok Arčon (Author), Meta Levstek (Author), Urška Lavrenčič Štangar (Author)

Abstract

The effect of different water matrices on the photocatalytic degradation of dissolved pharmaceuticals was explored. The focus was on the degradation efficiencies in wastewater effluent from a bioreactor and water effluent from a central wastewater treatment plant and comparing the results with degradation in deionized H2O. The compounds tested included: oxytetracycline, marbofloxacin, ibuprofen, diclofenac, phenytoin, ciprofloxacin, sulfamethoxazole. For the experiments performed in this study, a compact packed-bed photocatalytic reactor was used in which the hybrid TiO2 photocatalyst (sol-gel/P25) was deposited on ~3 mm glass beads. As expected, the reactions proceed more slowly in wastewater than in deionized water, yet it is shown that removal of the compounds from the water is still possible even when other organic molecules are present. Total organic carbon measurements have shown that complete mineralization takes place albeit at slower rates than the initial degradation of parent compounds. The results show that an acidic pH can increase the reaction rates and the adsorption on the photocatalyst surface. Analyses of the degradation intermediates were performed using tandem liquid chromatography triple-quadrupole mass spectrometry system. Additionally, X-ray absorption spectroscopy was applied to get insight into the local structure of the photocatalyst before and after use. Understanding the effects that different wastewater compositions have on photocatalytic reactions will help to refine the potential applications of the technology.

Keywords

titanov dioksid;sol-gel procesi;funkcionalna aplikacija;čiščenje vode;titanium dioxide;sol-gel processes;functionla applications;water treatment;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
UDC: 546.82-31:544.526.5
COBISS: 122451459 Link will open in a new window
ISSN: 0272-8842
Views: 432
Downloads: 0
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Other data

Secondary keywords: titanov dioksid;sol-gel procesi;funkcionalna aplikacija;čiščenje vode;
URN: URN:SI:UNG
Type (COBISS): Not categorized
Pages: str. 1-39
Volume: ǂVol. ǂ
Issue: ǂiss. ǂ
Chronology: 2022
DOI: 10.1016/j.ceramint.2022.09.204
ID: 17188704