Photochemical degradation of carbofuran and elucidation of removal mechanism

Lu, Lian Hai; Ma, Ying-Shih; Kumar, Mathava; Lin, Jih‐Gaw

doi:10.1016/j.cej.2010.10.045

Cited by 45 publications

(23 citation statements)

References 38 publications

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“…On the other hand, when pH=2, the hydroxyl radical can add to the aromatic ring and may also abstract a hydrogen atom and lead up to a radical chain oxidation (Walling 1975;Casero et al 1996;Neyens and Baeyens 2003). Lu et al have shown that the oxidation of carbofuran occurs when the radical hydroxyl attacks the furan ring (Lu et al 2011). These facts show that the pH of the medium also plays an important role in the degradation of these pesticides in this study.…”

Section: Effect Of Phsupporting

confidence: 48%

Environmentally friendly system for the degradation of multipesticide residues in aqueous media by the Fenton’s reaction

Guimarães

Kleemann

Caldas

et al. 2013

Environ Sci Pollut Res

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A Fenton oxidation system employing zero-valent iron (whose source was swarf, a residue of metallurgical industries, in powder form) and hydrogen peroxide for the treatment of an aqueous solution with six pesticides was developed, and the effect of the iron metal content, pH, and hydrogen peroxide concentration was evaluated. The characterization of the aqueous solution resulted in: pH 5.6, 105 mg L(-1) of dissolved organic carbon, and 44.6 NTU turbidity. In addition, the characterization of the swarf by FAAS and ICP-MS showed 98.43 ± 7.40 % of zero-valent iron. The removal was strongly affected by the content of iron metal, pH, and hydrogen peroxide concentration. The best degradation conditions were 2.0 g swarf, pH 2.0, and 5 mmol L(-1) H2O2. At the end of the treatment, the pesticide degradation ranged from 60 to 100%, leading to 55% mineralization. Besides, all hydrogen peroxide was consumed and the determination of total dissolved iron resulted in 2 mg L(-1). Thus, the advantages of this system are rapid degradation (up to 20 min), high-degradation rates, simple handling, and low cost.

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Section: Effect Of Phsupporting

confidence: 48%

Environmentally friendly system for the degradation of multipesticide residues in aqueous media by the Fenton’s reaction

Guimarães

Kleemann

Caldas

et al. 2013

Environ Sci Pollut Res

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“…Carbofuran can be transported and can contaminate surface and ground water sources (Lu et al, 2011). In insects, the main mechanism of toxic action of carbofuran, is also the inhibition of the enzyme acetylcholinesterase (Fukuto, 1990), Commercial formulations of carbofuran include the trademark Furadan SC 350 Ò .…”

Section: Introductionmentioning

confidence: 99%

Cytotoxicity of the association of pesticides Roundup Transorb® and Furadan 350 SC® on the zebrafish cell line, ZF-L

Goulart

Boyle

Souza

2015

Toxicology in Vitro

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The present study aimed to ascertain the cytotoxicity of pesticides commonly used in rice cultivation, through in vitro assays employing the ZF-L cell line. The in vitro analyses investigated three cellular targets (cell membrane integrity, mitochondrial activity and lysosomal stability) in cells exposed to concentrations of Roundup Transorb® (67.7 μg L(-1), 135.4 μg L(-1) and 270.8 μg L(-1)), Furadan 350 SC® (0.1 μg L(-1), 0.05 μg L(-1) and 0.02 μg L(-1)). We also tested these products in combination. We analyzed the defensive capacity of the cells by measuring the activity of xenobiotic extruder proteins, as well as the expression of these same proteins. Cytotoxic effects of both pesticides were observed individually, as well as with the mixture of both products; including an inhibitory effect on the activity of xenobiotic extrusion. When exposed to the insecticide Furadan, and also the mixture of Furadan and Roundup, there was an increase in the expression of P glycoproteins (P-gps). There was also a negative correlation with cytotoxicity, mainly exhibited by mitochondrial activity and lysosomal integrity, but also with respect to the activity of P-gps. We observed that concentrations below those allowed by law were toxic regarding all parameters tested in this study, with the exception of mitochondrial function. Taken together, our results suggest that toxicity may be due to the surfactants present in the commercial formulations.

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“…Therefore, the HO• could attack the C-O bond of the carbamate group to produce 7-phenolcarbofuran and carbamic acid as initial step. Subsequently, hydroxylations have been reported leading to 3-hydroxycarbofuran and 3-hydroxy-7-phenolcarbofuran followed by successive oxidations to produce 3-ketocarbofuran and 3-keto-7-phenolcarbofuran (Fenoll et al 2013;Lu et al 2011b;Lopez-Alvarez et al 2012). Regarding the IPR degradation, little information is currently available describing its degradation.…”

Section: Main Degradation Pathwaysmentioning

confidence: 97%

Degradation of a Toxic Mixture of the Pesticides Carbofuran and Iprodione by UV/H2O2: Evaluation of Parameters and Implications of the Degradation Pathways on the Synergistic Effects

Lopez-Alvarez

Villegas-Guzmán

Peñuela

et al. 2016

Water Air Soil Pollut

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The degradation of two pesticides, carbofuran (CBF) and ioprodine (IPR), was studied by the photolytic decomposition of hydrogen peroxide (UV/H 2 O 2 ). The influence of two experimental parameters, H 2 O 2 concentration and initial pH, as well as their interactions, was investigated. Optimization was carried out where experimental parameters were determined for the treatment of each pesticide. Both pesticides were totally eliminated by UV/H 2 O 2 system under optimal conditions. However, significant differences were found: CBF degradation was influenced by both parameters and their interactions, while IPR degradation was not statistically affected by initial pH. Interestingly, analysis of degradation pathways showed a major influence of photolysis process and oxidation due to hydrogen peroxide for the CBF degradation, while the synergistic combination between both of them played the most relevant role during IPR degradation. A mixture of both pesticides was also submitted to UV/H 2 O 2 action in which a lower rate was observed for IPR elimination while CBF was not affected. A 90 % of chemical oxygen demand (COD) was removed and 75 % of mineralization was achieved after the treatment of the mixture. Almost 92 % of the toxicity was eliminated making this technique a promising process to treat toxic mixtures of these pesticides.

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Photochemical degradation of carbofuran and elucidation of removal mechanism

Cited by 45 publications

References 38 publications

Environmentally friendly system for the degradation of multipesticide residues in aqueous media by the Fenton’s reaction

Environmentally friendly system for the degradation of multipesticide residues in aqueous media by the Fenton’s reaction

Cytotoxicity of the association of pesticides Roundup Transorb® and Furadan 350 SC® on the zebrafish cell line, ZF-L

Degradation of a Toxic Mixture of the Pesticides Carbofuran and Iprodione by UV/H2O2: Evaluation of Parameters and Implications of the Degradation Pathways on the Synergistic Effects

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