Decomposition of pesticide chlorfenvinphos in aqueous solutions by gamma-irradiation

Bojanowska-Czajka, Anna; Gałęzowska, A.; Marty, J.-L.; Trojanowicz, Marek

doi:10.1007/s10967-010-0567-8

Cited by 14 publications

(7 citation statements)

References 21 publications

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“…Two well defined peaks can be seen, one at 204 nm and the other at 245 nm. The latter peak has been related to the characteristic chlorfenvinphos aromatic ring π → π * transition and is the peak normally used to follow the degradation of this pesticide [55,56].…”

Section: Resultsmentioning

confidence: 99%

Photoelectrocatalyzed degradation of a pesticides mixture solution (chlorfenvinphos and bromacil) by WO3 nanosheets

Roselló-Márquez

Fernández‐Domene

Sánchez-Tovar

et al. 2019

Science of The Total Environment

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A photoelectrocatalyst consisting of WO3 nanosheets or nanorods has been synthesized by electrochemical anodization under hydrodynamic conditions, and has been used for the degradation of two toxic pesticides: chlorfenvinphos and bromacil. Nanostructures have been characterized by FESEM and Raman spectroscopy. Photoelectrochemical degradation tests have been carried out both for individual pesticide solutions and for a mixture solution, and the concentration evolution with time has been followed by UV-Vis spectrophotometry. For individual pesticides, pseudo-first order kinetic coefficients of 0.402 h -1 and 0.324 h -1 have been obtained for chlorfenvinphos and bromacil, respectively, while for the mixture solution, these kinetic coefficients have been 0.162 h -1 and 0.408 h -1 . The change in behavior towards pesticide degradation depending on whether individual or mixture solutions were used might be indicative of a competitive process between the two pesticide molecules when interacting with the WO3 nanostructures surface or when approaching the semiconductor/electrolyte interface.

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Section: Resultsmentioning

confidence: 99%

Photoelectrocatalyzed degradation of a pesticides mixture solution (chlorfenvinphos and bromacil) by WO3 nanosheets

Roselló-Márquez

Fernández‐Domene

Sánchez-Tovar

et al. 2019

Science of The Total Environment

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“…The initial chlorfenvinphos spectrum showed two clear absorbance peaks centered at 205 nm and 245 nm. The second peak (245 nm) has been related in the literature to the π-π* transition of the aromatic ring and it is the peak normally used to track the decomposition of this organophosphate pesticide [32,45]. It can be observed from Figure 4 that the intensity of both peaks decreased with irradiation time, regardless of the experimental conditions.…”

Section: Photoelectrocatalytic Degradation Of Chlorfenvinphos and Mineralization Degreementioning

confidence: 89%

“…The removal of hazardous pesticides from polluted surface waters and wastewaters cannot be efficiently performed by biological techniques, since they are toxic for microorganisms, thus hindering biodegradation. Other methods, based on the generation of the very oxidizing hydroxyl radicals, called Advanced Oxidation Processes (AOPs), have been used to remove chlorfenvinphos from aqueous solutions [10,[26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical removal of chlorfenvinphos by using WO3 nanorods: Influence of annealing temperature and operation pH

Fernández‐Domene

Roselló-Márquez

Sánchez-Tovar

et al. 2019

Separation and Purification Technology

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A visible-light driven photoelectrochemical degradation process has been applied to a solution polluted with the organophosphate insecticide chlorfenvinphos. Different WO3 nanosheets/nanorods have been used as photoanodes. These nanostructured electrodes have been fabricated by anodization of tungsten and, subsequently, they have been subjected to a thermal treatment (annealing). The combined influence of annealing temperature (400º C and 600º C) and operation pH (1 and 3) on the photoelectrocatalytic behavior of these nanorods has been examined through a statistical analysis. Morphological, structural and photoelectrochemical characterizations have also been carried out. The chlorfenvinphos degradation efficiency depended both on annealing temperature and, specially, operation pH. At pH 1 and using an annealing temperature of 600º C, chlorfenvinphos has been effectively degraded following pseudo-first order kinetics with a coefficient of 7.8×10 -3 min -1 , and notably mineralized (more than 65% of Total Organic Carbon decrease).

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“…Lo mismo ocurre con el compuesto número 8, cuyo valor de m/z es 210.11 y su cromatograma queda representado en la Figura 4.78 [127,128]. En él se puede observar cómo tras 4 horas de ensayo, se alcanza su valor máximo de concentración, pero al acabar el proceso de degradación, es decir, tras 24 horas, desaparece totalmente para dar lugar a moléculas más pequeñas.…”

Section: Uhplc-ms/q-tofunclassified

Eliminación de pesticidas organofosforados mediante fotoelectrocatálisis con fotoánodos de WO3

Márquez¹

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Decomposition of pesticide chlorfenvinphos in aqueous solutions by gamma-irradiation

Cited by 14 publications

References 21 publications

Photoelectrocatalyzed degradation of a pesticides mixture solution (chlorfenvinphos and bromacil) by WO3 nanosheets

Photoelectrocatalyzed degradation of a pesticides mixture solution (chlorfenvinphos and bromacil) by WO3 nanosheets

Photoelectrochemical removal of chlorfenvinphos by using WO3 nanorods: Influence of annealing temperature and operation pH

Eliminación de pesticidas organofosforados mediante fotoelectrocatálisis con fotoánodos de WO3

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