UV-C irradiation enhanced ozonation for the treatment of hazardous insecticide methomyl

Chang, Chia‐Chi; Trinh, Claire Bich-Thuy; Chiu, Chun-Yu; Chang, Ching‐Yuan; Chiang, Sheng-Wei; Ji, Dar-Ren; Tseng, Jyi-Yeong; Chang, Chia‐Yi; Chen, Yi‐Hung

doi:10.1016/j.jtice.2014.11.001

Cited by 10 publications

(7 citation statements)

References 19 publications

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“…However, the combination of UV light with other oxidants, such as in the H 2 O 2 /UV, Fenton/UV, and O 3 /UV systems, significantly enhanced the degradation rate. In these systems, UV absorption by methomyl promotes the formation of super-strong hydroxyl radicals, in the form of H 2 O 2 , Fe(OH) 2+ , and O 3 , respectively, that play an important role in the oxidation of pollutants [22,61]. Sunlight or visible light can also promote the production of hydroxyl radicals by a Fenton reaction for the photocatalytic degradation of methomyl.…”

Section: Physicochemical Methods For the Remediation Of Methomyl-affementioning

confidence: 99%

Current Approaches to and Future Perspectives on Methomyl Degradation in Contaminated Soil/Water Environments

et al. 2020

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Methomyl is a broad-spectrum oxime carbamate commonly used to control arthropods, nematodes, flies, and crop pests. However, extensive use of this pesticide in agricultural practices has led to environmental toxicity and human health issues. Oxidation, incineration, adsorption, and microbial degradation methods have been developed to remove insecticidal residues from soil/water environments. Compared with physicochemical methods, biodegradation is considered to be a cost-effective and ecofriendly approach to the removal of pesticide residues. Therefore, micro-organisms have become a key component of the degradation and detoxification of methomyl through catabolic pathways and genetic determinants. Several species of methomyl-degrading bacteria have been isolated and characterized, including Paracoccus, Pseudomonas, Aminobacter, Flavobacterium, Alcaligenes, Bacillus, Serratia, Novosphingobium, and Trametes. The degradation pathways of methomyl and the fate of several metabolites have been investigated. Further in-depth studies based on molecular biology and genetics are needed to elaborate their role in the evolution of novel catabolic pathways and the microbial degradation of methomyl. In this review, we highlight the mechanism of microbial degradation of methomyl along with metabolic pathways and genes/enzymes of different genera.

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Section: Physicochemical Methods For the Remediation Of Methomyl-affementioning

confidence: 99%

Current Approaches to and Future Perspectives on Methomyl Degradation in Contaminated Soil/Water Environments

et al. 2020

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“…The reduction was 68.5, 75.4 and 83.7% for the three compounds, respectively [40]. Insecticides -when seeds (soft wheat, maize, dry wheat) were fenvalerate, methomyl, deltamethrin and fenitrothion contaminated and O 3 treated (10-180 min, at 5-125 mg/l and 20-100 l/h flow) had quite effective reduction (up to 99%) [49][50][51][52]. Insecticides O 3 gas treated could be effectively reduced and degraded into non toxic by-products, especially for the rat liver functional interlinks [53,54].…”

Section: Toxic Compounds Combinedmentioning

confidence: 96%

Effectiveness of Ozone Gas Application Methods against Combined Multi-Contaminants in Food

Christ¹,

Savi²,

Scussel³

2017

fph

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Despite the ozone (known as GRAS -generally recognized as safe) gas treatments published for each food living organism or chemical decontamination, they are not necessarily present or contaminate food individually. Most of the time, they are present all together. Therefore, the most important point, regarding an O 3 application method to be chosen is its effectiveness to all contaminants that may be in the target food. Therefore, ozone gas decontamination methods that gather combined multi-contaminants and their effectiveness in food were surveyed. Both, for inactivation of living organisms (insects, mites, fungi, yeasts and bacteria) and degradation of toxic compounds (pesticides and mycotoxins). They are the main need for an effective and comprehensive commercial decontamination application. This review brings details on O 3 formation energy sources, its application conditions (concentration / time of exposure), container characteristics (volume / material type / sealed or hermetic) and effectiveness for different food (type / contamination level / batch size/moisture content). From the studies and data reported, ozone has shown to be an efficient green agent for combined multi-decontamination, thus prolonging the food storage and shelf life. It does not cause/produce adverse effects on food quality.

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Section: Proceso De Ozonizaciónunclassified

“…Se obtuvo una total degradación del metomilo cuando el tiempo de ozonización se prolongó a 10 min, teniendo una concentración de 0.4 mg/L, siendo degradado el 96%. La concentración de metomilo disminuye significativamente cuando el valor de pH aumenta a 11, debido a que en este pH el ozono disuelto es descompuesto para formar radicales hidroxilos y oxida el efluente 8 Al finalizar el experimento se concluyó que la ozonización es efectiva a pH 11 y tiempo de 10 min, ya que se observa una mayor degradación considerando estas las condiciones óptimas para aplicar la degradación del metomilo, tanto en agua simulada y real.…”

Section: Degradación De Metomilo En Agua Simulada Proceso Foto-fentonunclassified

“…La descomposición fotoinducida del peróxido de hidrógeno en agua pura se racionaliza mediante el mecanismo de cadena radical Haber-Weiss, según el cual los radicales hidroxilos originados por el clivaje homolítico del enlace O-O inician una secuencia de reacciones caracterizadas por un paso de iniciación (reacción 1), seguido de un paso de propagación dado por las otras reacciones 7 . El proceso de Ozonización se basa en procesos fisicoquímicos que involucran la generación y uso de especies transitorias poderosas, principalmente el radical hidroxilo 8 . La ozonización ha sido exitosamente utilizada para la remoción de metomilo en agua Milli-Q.…”

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Estudio Experimental De La Degradación Del Plaguicida Metomilo en Aguas Superficiales Aplicando Procesos Avanzados De Oxidación

Arenas¹,

Suni²,

Flores³

et al. 2021

rsqp

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El uso intensivo de agroquímicos para la producción de alimentos en los países en desarrollo ha generado un problema de interés ambiental pues muchas de estas sustancias que suelen ser difíciles de biodegradar pueden alcanzar fuentes naturales generando su contaminación. Es por ello que la búsqueda de nuevas tecnologías para la eliminación de estos contaminantes ha surgido con mucho interés. Los procesos avanzados de oxidación (PAOs), cuya principal característica es la generación de especies altamente oxidantes como el radical hidroxilo, pueden lograr la modificación química del contaminante generando subproductos que pueden ser menos dañinos con el medio ambiente. En este trabajo se evaluó la degradación de metomilo, un insecticida altamente utilizado en la región de Arequipa, Perú, utilizandodiferentes PAOs como la ozonización en medio alcalino, UV-C/H2O2 y procesos foto-Fenton a pH ácido. Se evaluó a escala de laboratorio el efecto de matriz de aniones como bicarbonatos, fluoruros y nitratos y posteriormente en aguas naturales superficiales. Los resultados indican que la mayor eliminación de metomilo en agua real se logró en 99.38 % bajo UV-C/H2O2 seguida del proceso fotofenton, con un 94.12 % de degradación y la ozonólisis a pH alcalino (pH 11) con un 40% de degradación, demostrando que los PAOs evaluados pueden ser una alternativa promisoria para eliminar agroquímicos de fuentes naturales.

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UV-C irradiation enhanced ozonation for the treatment of hazardous insecticide methomyl

Cited by 10 publications

References 19 publications

Current Approaches to and Future Perspectives on Methomyl Degradation in Contaminated Soil/Water Environments

Current Approaches to and Future Perspectives on Methomyl Degradation in Contaminated Soil/Water Environments

Effectiveness of Ozone Gas Application Methods against Combined Multi-Contaminants in Food

Estudio Experimental De La Degradación Del Plaguicida Metomilo en Aguas Superficiales Aplicando Procesos Avanzados De Oxidación

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