TY - JOUR AU - Wojnárovits, László AU - Homlok, Renáta AU - Kovács, Krisztina AU - Tegze, Anna AU - Takács, Erzsébet TI - Wastewater Characterization: Chemical Oxygen Demand or Total Organic Carbon Content Measurement? JF - MOLECULES J2 - MOLECULES VL - 29 PY - 2024 IS - 2 PG - 12 SN - 1420-3049 DO - 10.3390/molecules29020405 UR - https://m2.mtmt.hu/api/publication/34505067 ID - 34505067 LA - English DB - MTMT ER - TY - JOUR AU - Piszter, Gábor AU - Nagy, Gergely AU - Kertész, Krisztián Imre AU - Baji, Zsófia AU - Kovács, Krisztina AU - Bálint, Zsolt AU - Horváth, Zsolt Endre AU - Pap, József Sándor AU - Biró, László Péter TI - Investigating the Effect of Reflectance Tuning on Photocatalytic Dye Degradation with Biotemplated ZnO Photonic Nanoarchitectures Based on Morpho Butterfly Wings JF - MATERIALS J2 - MATERIALS VL - 16 PY - 2023 IS - 9 PG - 14 SN - 1996-1944 DO - 10.3390/ma16093584 UR - https://m2.mtmt.hu/api/publication/34046597 ID - 34046597 LA - English DB - MTMT ER - TY - JOUR AU - Kovács, Krisztina AU - Tegze, Anna AU - Bezsenyi, Anikó AU - Wojnárovits, László TI - Hydroxyl radical induced degradation of the ß-blocker Nadolol and comparison with Propranolol JF - JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING J2 - J ENVIRON CHEM ENG VL - 11 PY - 2023 IS - 4 PG - 8 SN - 2213-3437 DO - 10.1016/j.jece.2023.110330 UR - https://m2.mtmt.hu/api/publication/34046593 ID - 34046593 LA - English DB - MTMT ER - TY - JOUR AU - Wojnárovits, László AU - Homlok, Renáta AU - Kovács, Krisztina AU - Bezsenyi, Anikó AU - Takács, Erzsébet TI - Ionizing Radiation Induced Removal of Ofloxacin, Abatement of Its Toxicity and Antibacterial Activity in Various Water Matrices JF - APPLIED SCIENCES-BASEL J2 - APPL SCI-BASEL VL - 13 PY - 2023 IS - 12 PG - 11 SN - 2076-3417 DO - 10.3390/app13127211 UR - https://m2.mtmt.hu/api/publication/34021793 ID - 34021793 LA - English DB - MTMT ER - TY - JOUR AU - Kovács, Krisztina AU - Simon, Á. AU - Tóth, Tünde AU - Wojnárovits, László TI - Free radical chemistry of atenolol and propranolol investigated by pulse and gamma radiolysis JF - RADIATION PHYSICS AND CHEMISTRY: THE JOURNAL FOR RADIATION PHYSICS RADIATION CHEMISTRY AND RADIATION PROCESSING J2 - RADIAT PHYS CHEM VL - 196 PY - 2022 PG - 10 SN - 0969-806X DO - 10.1016/j.radphyschem.2022.110141 UR - https://m2.mtmt.hu/api/publication/32831031 ID - 32831031 AB - Using pulse- and γ-radiolysis the free radical chemistry of atenolol and propranolol was investigated in aqueous solutions evaluating also the consequences of radical reactions on the elimination of organic content and toxicity. In aerated solutions, the hydroxyl radicals (•OH) induce the degradation; at low dissolved O2 concentration, the hydrated electrons (eaq−) may also contribute to the reactions. Propranolol showed higher reactivity towards both •OH and eaq− than atenolol. About 80–90% of •OH attack occurred on the aromatic rings (benzene or naphthalene), the reactions on the oxypropanolamine side chains had lower rate. The reactions with the aromatic rings gave hydroxycyclohexadienyl radicals, by radical titration experiments α-aminoalkyl and aminium radicals were shown forming by •OH attack on the side chain. Only the end-products of propranolol showed toxicity at low doses which was attributed to the formation of naphthalene derivatives, e.g., substituted naphthols. LA - English DB - MTMT ER - TY - JOUR AU - Kovács, Krisztina AU - Tóth, Tünde AU - Wojnárovits, László TI - Evaluation of advanced oxidation processes for ß-blockers degradation: a review JF - WATER SCIENCE AND TECHNOLOGY J2 - WATER SCI TECHNOL VL - 85 PY - 2022 IS - 2 SP - 685 EP - 705 PG - 21 SN - 0273-1223 DO - 10.2166/wst.2021.631 UR - https://m2.mtmt.hu/api/publication/32687160 ID - 32687160 LA - English DB - MTMT ER - TY - JOUR AU - Wojnárovits, László AU - Wang, JL AU - Chu, LB AU - Tóth, Tünde AU - Kovács, Krisztina AU - Bezsenyi, Anikó AU - Szabó, László AU - Homlok, Renáta AU - Takács, Erzsébet TI - Matrix effect in the hydroxyl radical induced degradation of ß-lactam and tetracycline type antibiotics JF - RADIATION PHYSICS AND CHEMISTRY: THE JOURNAL FOR RADIATION PHYSICS RADIATION CHEMISTRY AND RADIATION PROCESSING J2 - RADIAT PHYS CHEM VL - 193 PY - 2022 PG - 10 SN - 0969-806X DO - 10.1016/j.radphyschem.2022.109980 UR - https://m2.mtmt.hu/api/publication/32632511 ID - 32632511 AB - Due to the spread of antibiotic resistant bacteria, elimination of antibiotics from purified wastewater is a highly important task. Purified wastewater contains large variety of organic/inorganic compounds that strongly influence the efficiency of advanced oxidation processes (AOP). In this work, we investigate the radiation-induced degradation of selected antibiotic contaminants (oxacillin and cloxacillin from the beta-lactams; tetracycline and chlortetracycline from the tetracyclines) in four matrices: pure water, tap water, synthetic wastewater and purified wastewater received from a wastewater treatment plant. Changes in technically important parameters, such as COD, TOC, BOD, OUR, acute toxicity and antibacterial activity, were investigated at 0.1 mmol dm(-3) (40-48 mg dm(-3)) antibiotic concentration. None of the four antibiotics were biodegradable in any of the four matrices, however, after irradiation with relatively low doses the obtained products were biodegradable. Oxacillin and cloxacillin were not toxic in Vibrio fischeri test, while tetracycline and chlortetracycline showed toxicity that was strongly reduced by the irradiation treatment. Both COD and TOC decreased after irradiation, their ratio shifted towards TOC indicating an increase in the average oxidation state (AOS). The increase in AOS was lower in purified wastewater matrices: this matrix may contain various small, highly oxidized molecules in high concentration, which degrade very slowly in AOP. The antibacterial activity in most of matrices was greatly reduced or completely disappeared at around 2-4 kGy. However, in purified wastewater matrices some antibiotic activity remained even at 4 kGy. Here the degradation of antibiotic is slow (small delta COD/dose value) because a large fraction of the reactive radicals is scavenged presumably by small, highly oxidized molecules in the solution. Although the water radiolysis product H2O2 affected some of the bioassays, this phenomenon was absent in purified wastewater. The purified wastewater after ionizing radiation treatment can be safely released into the receiving lakes or rivers. LA - English DB - MTMT ER - TY - JOUR AU - Takács, Erzsébet AU - Wang, J. AU - Chu, L. AU - Tóth, Tünde AU - Kovács, Krisztina AU - Bezsenyi, Anikó AU - Szabó, László AU - Homlok, Renáta AU - Wojnárovits, László TI - Elimination of oxacillin, its toxicity and antibacterial activity by using ionizing radiation JF - CHEMOSPHERE J2 - CHEMOSPHERE VL - 286 PY - 2022 PG - 8 SN - 0045-6535 DO - 10.1016/j.chemosphere.2021.131467 UR - https://m2.mtmt.hu/api/publication/32126916 ID - 32126916 LA - English DB - MTMT ER - TY - CHAP AU - Kovács, Krisztina AU - Simon, A AU - Tóth, Tünde AU - Wojnárovits, László ED - Alapi, Tünde ED - Berkecz, Róbert ED - Ilisz, István TI - High energy ionizing radiation induced degradation of ß-blockers in aqueous solutions T2 - Proceedings of the 27th International Symposium on Analytical and Environmental Problems PB - University of Szeged CY - Szeged SN - 9789633068359 PY - 2021 SP - 188 EP - 192 PG - 5 UR - https://m2.mtmt.hu/api/publication/32720609 ID - 32720609 LA - English DB - MTMT ER - TY - CHAP AU - Kovács, Krisztina AU - Simon, A AU - Tóth, Tünde AU - Wojnárovits, László ED - Jószai, I TI - ß-blokkolók bomlási reakciói nagyenergiájú ionizáló sugárzás hatására vizes oldatokban. T2 - Őszi Radiokémiai Napok 2021 PB - Magyar Kémikusok Egyesülete (MKE) CY - Budapest SN - 9786156018076 PY - 2021 SP - 111 EP - 112 PG - 2 UR - https://m2.mtmt.hu/api/publication/32720607 ID - 32720607 LA - Hungarian DB - MTMT ER -