20.500.12556/RUL-169569 Aquatic photochemistry and transformations of multiclass emerging organic contaminants in environmental water matrices This study shows a comprehensive assessment of the photodegradation of 18 multiclass contaminants of emerging concern (CECs) in simulated river and marine aquatic compartments. Degradation trends, mineralization, and defluorination of the target CECs were monitored in model matrices, artificial and real seawater, with and without aeration. Each model matrix contained a natural abiotic factor of interest, i.e., chloride, nitrate, humic acid, lignosulfonate, and iron, all naturally present in surface water. Transformation pathways were investigated by UHPLC-MS/MS and for the identified transformation products (TPs), their ecotoxicities were predicted in silico. Only 8 out of 18 selected CECs were found to be significantly photolabile, especially rosuvastatin. Direct photolysis was their primary degradation route, while abiotic factors either accelerated or supressed the degradation depending on the type of CEC. Real and artificial seawater mostly acted inhibitory. Oxygen aeration mostly accelerated degradation showing the effect of singlet oxygen. Low mineralization and defluorination were in most cases linked to the formation of stable and relatively more toxic TPs, which were characteristic for rosuvastatin. Main identified TPs were screened in real river water and seawater (North Adriatic Sea water basin, Slovenia, Europe). Rosuvastatin’s TP ROS-349 was detected with a high confidence level for the first time, which may raise environmental concerns. Overall, advanced assessment of aquatic photochemistry is achieved by using low concentrations, mixtures of multiclass CECs, UV light above 300 nm, more realistic matrices, as well as by identifying, ranking, and analysing the TPs in actual aquatic environment. water pollution emerging organic pollutants photodegradation transformation products environmental fate mass spectrometry liquid chromatography emerging pollutants onesnaževanje voda novodobna organska onesnaževala fotorazgradnja transformacijski produkti kemijska usoda snovi v okolju masna spektrometrija tekočinska kromatografija true false true Angleški jezik Slovenski jezik Članek v reviji 2025-06-04 12:38:24 2025-06-04 12:38:26 2025-06-06 10:32:20 0000-00-00 00:00:00 2025 0 0 12 str. Vol. 469, art. 116491 1 Dec. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.526.2:543.544.5:543.51 1010-6030 10.1016/j.jphotochem.2025.116491 238277635 RAZ_Kravos_Aleksander_2025.pdf RAZ_Kravos_Aleksander_2025.pdf 1 F3A3CCC1174835EE08D47E81F44438C8 c5725235face8c5be02a669408ca3a4028940191e959f05c77359048c1191f55 99ed1e1f-412f-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211048 https://www.sciencedirect.com/science/article/pii/S101060302500231X 1 baf47a1c-412e-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211047 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0