title: Efficient removal of sulcotrione and its formulated compound Tangenta® in aqueous TiO2 suspension: Stability, photoproducts assessment and toxicity.
abstract: The photocatalytic degradation of the herbicide sulcotrione (0.05 mM) and its formulated compound Tangenta® in aqueous suspensions of TiO2 Degussa P25 was examined as a function of the different operational parameters. The optimum of the catalyst loading was found to be 2.0 mg mL(-1) under UVA light. In the first stage of the reaction, the photocatalytic degradation of sulcotrione alone and in Tangenta® followed the pseudo-first order kinetics, in which the heterogeneous catalysis proceeds via OH and holes. Further, it can be concluded that degradation rate of sulcotrione alone is about two times higher compared to formulated compound. The results showed that the disappearance of sulcotrione led to the formation of three organic intermediates and ionic byproducts (Cl(-), SO4(2-), acetate and formate), whereas their mineralization was about 90% after 4 h. Tentative photodegradation pathways were proposed and discussed. Also, there was no significant toxicity observed after the irradiation of sulcotrione solution and Tangenta® formulation using TiO2 catalyst on three mammalian cell lines.
authors.affiliation: University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg D. Obradovića 3, 21000 Novi Sad, Serbia. Electronic address: daniela.sojic@dh.uns.ac.rs.
authors.forename: Daniela V
authors.initials: DV
authors.lastname: Šojić
authors.affiliation: University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg D. Obradovića 3, 21000 Novi Sad, Serbia. Electronic address: dejan.orcic@dh.uns.ac.rs.
authors.forename: Dejan Z
authors.initials: DZ
authors.lastname: Orčić
authors.affiliation: University of Novi Sad, Faculty of Medicine, Oncology Institute of Vojvodina, Dr Goldmana 4, 21204 Sremska Kamenica, Serbia. Electronic address: ddaaggeerr@gmail.com.
authors.forename: Dragana D
authors.initials: DD
authors.lastname: Četojević-Simin
authors.affiliation: University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg D. Obradovića 3, 21000 Novi Sad, Serbia. Electronic address: nemanja.banic@dh.uns.ac.rs.
authors.forename: Nemanja D
authors.initials: ND
authors.lastname: Banić
authors.affiliation: University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg D. Obradovića 3, 21000 Novi Sad, Serbia. Electronic address: biljana.abramovic@dh.uns.ac.rs.
authors.forename: Biljana F
authors.initials: BF
authors.lastname: Abramović
mesh_terms: D000818:Animals; D002384:Catalysis; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D003512:Cyclohexanones / Q000302:isolation & purification* / Q000528:radiation effects / Q000633:toxicity; D006801:Humans; D007700:Kinetics; D008027:Light; D008698:Mesylates / Q000302:isolation & purification* / Q000528:radiation effects / Q000633:toxicity; D010782:Photolysis; D012996:Solutions; D013535:Suspensions; D014025:Titanium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000528:radiation effects / Q000633:toxicity; D018508:Water Purification / Q000379:methods*
chemical_list: D003512:Cyclohexanones; D008698:Mesylates; D012996:Solutions; D013535:Suspensions; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; C079906:sulcotrione; D014025:Titanium
keywords: Kinetics; Sulcotrione; Tangenta®; TiO(2) Degussa P25; Toxicity; Transformation products