Photocatalytic degradation of methyl parathion: Reaction pathways and intermediate reaction products

Moctezuma, Edgar; Palestino, Gabriela; Lasa, Hugo de

doi:10.1016/j.jphotochem.2006.07.014

Cited by 106 publications

(71 citation statements)

References 40 publications

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“…The ultrasound horn tip was placed in front of the working electrode face. Prior to the experiments for each analytic curve, in the absence and presence of ultrasound, the BDD electrode received a pre-treatment at +3.0 and -3.0 V during 5 and 30 s respectively in a H 2 SO 4 …”

Section: Methodsmentioning

confidence: 99%

“…The importance of 4-NP determination is related to the degradation pathway of several organophosphorous pesticides such as fenitrothion and parathion that are decomposed in soils and waters producing 4-NP as an intermediate or a final product of the reaction. 3,4 Levels of 4-NP are usually quantified using chromatographic techniques, such as gas chromatography, 5 high performance liquid chromatography, 6 liquid chromatography associated with mass spectroscopy 7 and capillary electrophoresis. 8 On the other hand, electroanalytical methods have been proposed for 4-NP determination at the hanging mercury drop electrode, 9,10 at modified glassy carbon electrodes [11][12][13] and at a boron-doped diamond (BDD) microelectrode.…”

Section: Introductionmentioning

confidence: 99%

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Sonovoltammetric determination of 4-nitrophenol on diamond electrodes

Garbellini¹,

Salazar‐Banda²,

Avaca³

2007

J. Braz. Chem. Soc.

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A determinação sonovoltamétrica do 4-nitrofenol foi estudada sobre um eletrodo de diamante dopado com boro. Foram observadas melhorias significativas na sensibilidade analítica devido à limpeza da superfície eletródica e ao aumento no transporte de espécies ao eletrodo proporcionados pelo ultra-som. Desta maneira, para os processos de oxidação e redução, os limites de detecção diminuíram de 11.7 para 3.87 e de 6.38 para 2.57 µg L -1 , respectivamente.The sonovoltammetric determination of 4-nitrophenol was studied on a boron-doped diamond electrode. Significant improvements in the analytical sensibility were observed due to electrode surface cleaning and the enhancement in the transport of species to the electrode surface provided by ultrasound. Thus, for the oxidation and reduction process, the limit of detection diminished from 11.7 to 3.87 and from 6.38 to 2.57 µg L -1 , respectively.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sonovoltammetric determination of 4-nitrophenol on diamond electrodes

Garbellini¹,

Salazar‐Banda²,

Avaca³

2007

J. Braz. Chem. Soc.

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“…The degradation of cationic surfactants such as cetyltrimethylammonium bromide also justifies the presence of these ammonium ions. The nitrites concentrations have a minimum of 0.003 mg/L and a maximum of [15]. Ammonium and nitrite ions can be oxidized into nitrates.…”

Section: Nhmentioning

confidence: 99%

Physico-Chemical Characterization of Industrial Liquid Discharges of Soap Factories in Abidjan, Côte D’Ivoire

Ehouman¹,

Yapo²,

Gnagne³

et al. 2017

GEP

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This work deals with the efficient management of industrial liquid discharges from soap factories (ILDS) in the region of Abidjan. The aim of this work is to evaluate the physico-chemical quality of these discharges as well as the different types of pollution generated. Seventeen (17) industrial soap sources were studied through fourteen (14) global pollution parameters (T, pH, electrical conductivity EC, redox potential E H , suspended matter SM, COD, BOD 5 , biodegradability factor BF, 4

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“…7) Transformation by chemical means is known to be the most efficient method. Over the past decade, research into the degradation of parathion and methyl parathion [O,O-dimethyl O-(p-nitrophenyl) phosphorothioate] by photolytic, [8][9][10] bacteriological, 11) ultrasonic, and UV irradiations [12][13][14] has led to the development of effective methods that respect the environment.…”

Section: Co-genotoxic Potential In Human Hepatoma Hepg2 Cells May Be mentioning

confidence: 99%

Hydrolytic decontamination of methyl parathion in the presence of 2-aminoethanol: Kinetics study

Doumandji¹,

Moussiden

Ihdene³

et al. 2018

Journal of Pesticide Science

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Methyl parathion (MP) decontamination by hydrolysis in aqueous solutions containing 2-aminoethanol (EA) was investigated using the UV-Visible and GC/MS techniques. The kinetics of the hydrolysis reaction was studied at pH values of 4, 7, and 9 in water at 75, 85, and 95°C, respectively. At various EA concentrations 60, 100, and 200 mg/L MP degradation followed pseudofirst order kinetics and was found to be strongly pH and temperature dependent. The rate of MP degradation accelerated significantly as pH increased. The conversion reached 93.5% after 90 min of hydrolysis at a pH of 9, as compared to 69.9% and 49.8% at pH values of 7 and 4, respectively. The MP degradation byproducts removed from aqueous solutions by solid phase microextraction (SPME) were identified. The main intermediate products were p-nitrophenol and O,O-dimethyl phosphorothioate. This study concludes that hydrolysis in the presence of EA is an effective process for decontaminating solutions containing MP.

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Photocatalytic degradation of methyl parathion: Reaction pathways and intermediate reaction products

Cited by 106 publications

References 40 publications

Sonovoltammetric determination of 4-nitrophenol on diamond electrodes

Sonovoltammetric determination of 4-nitrophenol on diamond electrodes

Physico-Chemical Characterization of Industrial Liquid Discharges of Soap Factories in Abidjan, Côte D’Ivoire

Hydrolytic decontamination of methyl parathion in the presence of 2-aminoethanol: Kinetics study

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Photocatalytic degradation of methyl parathion: Reaction pathways and intermediate reaction products

Cited by 106 publications

References 40 publications

Sonovoltammetric determination of 4-nitrophenol on diamond electrodes

Sonovoltammetric determination of 4-nitrophenol on diamond electrodes

Physico-Chemical Characterization of Industrial Liquid Discharges of Soap Factories in Abidjan, C&#244;te D’Ivoire

Hydrolytic decontamination of methyl parathion in the presence of 2-aminoethanol: Kinetics study

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Physico-Chemical Characterization of Industrial Liquid Discharges of Soap Factories in Abidjan, Côte D’Ivoire