Reaction kinetics of mesotrione removal catalyzed by TiO2 in the presence of different electron acceptors
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Many parameters influence the reaction kinetics of photocatalytic degradation of organic pollutants and their effects need to be evaluated. In this work, a full factorial experimental design was used to study the main parameter effects in detail and their interactions on the kinetics of mesotrione removal using TiO2 Hombikat (TiO2) suspension under simulated sunlight. The parameters which affect the efficiency of mesotrione photocatalytic degradation such as the loading of TiO2, concentration of KBrO3, absence/presence of fullerenol (FNP), as well as O2 purging were investigated. The photocatalytic degradation efficiency of mesotrione (%) in the range from 43.3 to 96.7% and apparent rate constants (kapp), obtained by exponential fitting, in the range from 1.849 × 10−2 min−1 to 6.228 × 10−2 min−1 with coefficient of determination ~ 0.99 are used as responses. From the statistical analysis in the case of both responses, the highest influence on the system has parameter loading of TiO2. The highest percentage of mesotrione removal was achieved with all parameters at high level, while the highest value of kapp was obtained under the same experimental conditions but in the absence of fullerenol.
KeywordsTiO2 photocatalysis Kinetics Mesotrione Electron acceptors Fullerenol Full factorial design
This study was supported by a grant from the Ministry of Education, Science and Technological Development of the Republic of Serbia, Project Numbers: ON 172042 and III 45005.
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Conflicts of interest
The authors declare that they have no conflict of interest.
- 2.Dumas E, Giraudo M, Goujone M, Halma E, Knhili E, Stauffert M, Batisson I, Besse-Hoggan P, Bohatier J, Bouchard P, Celle-Jeanton H, Costa Gomes M, Delbac F, Forano C, Goupil P, Guix N, Husson P, Ledoigt G, Mallet C, Mousty C, Prévot V, Richard C, Sarraute S (2017) Fate and ecotoxicological impact of new generation herbicides from the triketone family: an overview to assess the environmental risks. J Hazard Mater 325:136–156CrossRefGoogle Scholar
- 10.Stoob K, Singer HP, Goetz CW, Ruff M, Mueller SR (2005) Fully automated online solid phase extraction coupled directly to liquid chromatography–tandem mass spectrometry. Quantification of sulfonamide antibiotics, neutral and acidic pesticides at low concentrations in surface waters. J Chromatogr A 1097:138–147CrossRefGoogle Scholar
- 20.http://www.agritox.anses.fr/php/sa.php?sa=1221. Accessed 18 March, 2019
- 32.Djordjevic A, Šojić Merkulov D, Lazarević M, Borišev I, Medić I, Pavlović V, Miljević B, Abramović B (2018) Enhancement of nano titanium dioxide coatings by fullerene and polyhydroxy fullerene in the photocatalytic degradation of the herbicide mesotrione. Chemosphere 196:145–152CrossRefGoogle Scholar
- 37.Lente G (2015) Deterministic kinetics in chemistry and systems biology the dynamics of complex reaction networks. Springer, BerlinGoogle Scholar
- 38.Miller JN, Miller JC (2010) Statistics and chemometrics for analytical chemistry, 6th edn. Pearson, Harlow, p 198Google Scholar
- 39.Brereton RG (2003) Chemometrics data analysis for the laboratory and chemical plant, 1st edn. Wiley, Chichester, p 54Google Scholar