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- W2004356387 abstract "Abstract Heterogeneous photocatalysis offers an alternative for the treatment of wastewater containing refractory pollutants. The photocatalytic degradation of metamitron and metribuzin, asymmetrical triazine compounds used worldwide as herbicides, was investigated in aqueous suspension of different commercial TiO2 nanopowders with different composition of anatase/rutile phases, using artificial UV-A light. In addition, we have studied the role of the most important operating parameters (catalyst loading, effect of electron acceptor, pH, light intensity, initial concentration of pollutants, and interfering substances) on the photooxidation of both herbicides. TiO2 P25 (70% anatase/30% rutile) was found to be highly active for herbicide decomposition. The progress of photocatalytic degradation of both herbicides has been observed by monitoring the change in substrate concentration using HPLC/MS2. Results showed that the addition of TiO2 in tandem with an electron acceptor like Na2S2O8 strongly enhances the degradation rate of metamitron and metribuzin in comparison with photolytic test. The degradation of these herbicides followed a pseudo-first order kinetics. The time required for 50% degradation was lower than 8 min for both. Thus, complete disappearance was achieved after 30 min of illumination in the TiO2/Na2S2O8 system. Both herbicides were rapidly deaminated." @default.
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- W2004356387 date "2015-09-01" @default.
- W2004356387 modified "2023-09-24" @default.
- W2004356387 title "Photocatalytic mitigation of triazinone herbicide residues using titanium dioxide in slurry photoreactor" @default.
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- W2004356387 doi "https://doi.org/10.1016/j.cattod.2014.12.011" @default.
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