Study of the decomposition and detoxification of the herbicide bentazon by heterogeneous photocatalysis: Kinetics, intermediates and transformation pathways

Berberidou, Chrysanthi; Kitsiou, Vasiliki; Kazala, Eleutheria; Lambropoulou, Dimitra A.; Κούρας, Αθανάσιος; Kosma, Christina I.; Albanis, Triantafyllos A.; Poulios, Ioannis

doi:10.1016/j.apcatb.2016.06.068

Cited by 58 publications

(30 citation statements)

References 58 publications

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“…Other researchers correlate this finding to the crystalline structure of this catalyst, which consists of 75% anatase and 25% rutile, and the mixture of phases is considered more effective than the individual ones (pure crystalline phases) [35]. It was also reported that the enhanced activity of TiO 2 P25 can be due to the small size of rutile particles and their proximity to anatase particles [36].…”

Section: Adsorption Photolysis and Photocatalytic Testsmentioning

confidence: 76%

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Vrînceanu

Hlihor²,

Simion

et al. 2019

Catalysts

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This work demonstrates new evidence of the efficient destruction and mineralization of an emergent organic pollutant using UV-A and titanium nanosized catalysts. The target compound considered in this work is the primary metabolite of a lipid regulator drug, clofibrate, identified in many studies as refractory during conventional wastewater treatment. The photocatalytic performance study was carried out in batch mode at laboratory scale, in aqueous suspension. Kinetic data showed that titanium dioxide P25 Aeroxide® exhibits the highest photocatalytic efficiency compared to the other investigated catalysts. Pollutant degradation and mineralization efficiencies strongly increased when decreasing the initial substrate concentration. Target molecules oxidized faster when the catalyst load increased, and the mineralization was enhanced under acidic conditions: 92% of mineralization was achieved at pH 4 after 190 min of reaction. Radical quenching assays confirmed that HO• and ( h vb + ) were the reactive oxygen species involved in the photocatalytic oxidation of the considered pollutant. In addition, further results revealed that the removal efficiency decreased in real water matrices. Finally, data collected through a series of phytotoxicity tests demonstrated that the photocatalytic process considerably reduces the toxicity of the treated solutions, confirming the process’s effectiveness in the removal of persistent and biorefractory emergent organic water pollutants.

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Section: Adsorption Photolysis and Photocatalytic Testsmentioning

confidence: 76%

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Vrînceanu

Hlihor²,

Simion

et al. 2019

Catalysts

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“…The 10 transformation products formed during the degradation of bentazone in filter sand (Table S3), have, to the authors knowledge, not previously been identified or ascribed to biodegradation, although some have also been observed during photocatalytic degradation by TiO2/UV-A (26). Degradation in filter sand might deviate from degradation in soils, partly because fungi are widely present in soils (31,32), while preliminary studies of sand filters have focused on prokaryotes (29,30,33), but also because sand filters do not have the same humic matrix.…”

Section: Degradation Pathwaymentioning

confidence: 98%

Microbial degradation pathways of the herbicide bentazone in filter sand used for drinking water treatment

Hedegaard

Prasse

Albrechtsen

2019

Environ. Sci.: Water Res. Technol.

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“…Phytotoxicity was determined in samples collected during photocatalytic treatment of thiacloprid employing the standard Phytotoxkit microbiotest as reported previously. This bioassay measures the decrease/absence of seed germination and/or the decrease of root growth of three eukaryotic species: the monocotyl Sorghum saccharatum ( S. saccharatum) and the dicotyls garden cress Lepidium sativum (L. sativum) and mustard Sinapis alba (S. alba) , after seed exposure to the sample.…”

Section: Methodsmentioning

confidence: 99%

Decomposition and detoxification of the insecticide thiacloprid by TiO₂‐mediated photocatalysis: kinetics, intermediate products and transformation pathways

Berberidou

Kitsiou

Lambropoulou

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Pesticides are listed among the main environmental stressors directly correlated with severe impacts on ecosystems and human health. Here, the potential of TiO 2 -mediated photocatalytic oxidation of the insecticide thiacloprid, in aqueous media, is investigated thoroughly. RESULTS: Degradation was investigated under various operational conditions, including the initial concentration of the pesticide, the type and amount of catalyst, pH and the presence of electron acceptors. The prevalence of TiO 2 P25 in comparisonto the other titania employed, is obvious both in the case of decomposition and carbon mineralization. Twenty-seven transformation products generated during the photocatalytic decomposition of thiacloprid under UV-A irradiation were elucidated by high-resolution liquid chromatography mass spectrometry analysis, enabling the proposition of potential fragmentation pathways. The initial ecotoxicity of the insecticide determined by measurements of the bioluminescence of marine bacteria Vibrio fischeri was eliminated within 240 min of UV-A irradiation in the presence of TiO 2 P25. A phytotoxicity evaluation based on three eukaryotic plant species led to similar conclusions, resulting in the complete removal of phytotoxicity within 240 min of UV-A illumination in the presence of TiO 2 P25. CONCLUSIONS: These findings suggest that TiO 2 -mediated photocatalytic oxidation has the potential to efficiently detoxify water containing neonicotinoid pesticides.

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Study of the decomposition and detoxification of the herbicide bentazon by heterogeneous photocatalysis: Kinetics, intermediates and transformation pathways

Cited by 58 publications

References 58 publications

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Microbial degradation pathways of the herbicide bentazone in filter sand used for drinking water treatment

Decomposition and detoxification of the insecticide thiacloprid by TiO₂‐mediated photocatalysis: kinetics, intermediate products and transformation pathways

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Study of the decomposition and detoxification of the herbicide bentazon by heterogeneous photocatalysis: Kinetics, intermediates and transformation pathways

Cited by 58 publications

References 58 publications

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Microbial degradation pathways of the herbicide bentazone in filter sand used for drinking water treatment

Decomposition and detoxification of the insecticide thiacloprid by TiO2‐mediated photocatalysis: kinetics, intermediate products and transformation pathways

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Decomposition and detoxification of the insecticide thiacloprid by TiO₂‐mediated photocatalysis: kinetics, intermediate products and transformation pathways