Ozone as degradation agent of pesticide residues in stored rice grains

Ávila, Mariane Borges Rodrigues de; Faroni, L. R. D.; Heleno, Fernanda Fernandes; Queiroz, Maria Eliana Lopes Ribeiro de; Costa, Luiz P.

doi:10.1007/s13197-017-2884-1

Cited by 17 publications

(4 citation statements)

References 30 publications

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“…The fate of PM in salmon presented previously is the first description of the metabolic pathway of this pesticide in fish, therefore providing novel and relevant knowledge for policy makers and expert committees in charge of evaluating pesticides in the food production chain such as the European Food Safety Authority (EFSA). Indeed, previous research focused on the metabolism of PM in terrestrial livestock or the chemical degradation of PM during storage of products such as rice grains, maize grains, and wheat grains . Overall, the observations made on salmon are consistent with the existing literature on other food-producing animals.…”

Section: Resultssupporting

confidence: 85%

A Refined Nontarget Workflow for the Investigation of Metabolites through the Prioritization by in Silico Prediction Tools

2019

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The application of nontargeted strategies based on high-resolution mass spectrometry (HRMS) directed toward the discovery of metabolites of known contaminants in fish is an interesting alternative to true nontarget screening. To reduce prolonged and costly laboratory experiments, recent advances in computing power have permitted the development of comprehensive knowledge-based software to predict the metabolic fate of chemicals. In addition, machinebased learning tools allow the prediction of chromatographic retention times (RT) or collision cross section (CCS) values when using ion mobility spectrometry (IMS). These tools can ease data evaluation and strengthen the confidence in the identification of compounds. The current work explores the capabilities of in silico prediction tools, refined by the use of RT and CCS prediction, to prioritize and facilitate nontarget liquid chromatography (LC)−IMS−HRMS data processing. The fate of the insecticide pirimiphos-methyl (PM) in farmed Atlantic salmon exposed to contaminated feed was used as a case study. The theoretical prediction of 60 potentially relevant biological PM metabolites permitted the prioritization of screening in different salmon tissues (liver, kidney, bile, muscle, and fat) of known and unknown PM metabolites. An average of 43 potential positives was found in the sample matrixes based on the accurate mass of protonated molecules (mass error ≤5 ppm). The application of different tolerance filters for RT (Δ ≤ 2 min) and CCS (Δ ≤ 6%) based on predicted values permitted us to reduce this number up to 66% of the features. Finally, five PM metabolites could be identified; two known metabolites (2-DAMP and N-desethyl PM) were confirmed with a standard, whereas three previously unknown metabolites (2-DAMP glucuronide, didesethyl PM, and hydroxy-2-DAMP glucuronide) were tentatively identified in different matrixes, allowing the first proposition of a metabolic pathway in fish.

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Section: Resultssupporting

confidence: 85%

A Refined Nontarget Workflow for the Investigation of Metabolites through the Prioritization by in Silico Prediction Tools

2019

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“…The low-pressure ozone injection system did not change (P > 0.05) the moisture content, color difference (ΔE*), color hue (h*), and color saturation (C*) of the grains. These results corroborate previous studies that showed that ozone gas did not change the moisture content of packaged grains of corn, 71 rice, 72 and linseed (Linum usitatissimum L.). 73 Previous scientific investigations demonstrated that the process of injecting ozone gas in flow could lead to grain drying 70,74 and color alterations.…”

Section: Quality Of the Ozonized Grainssupporting

confidence: 92%

Low‐pressure ozone injection system: relationship between reaction kinetics and physical properties of grains

et al. 2022

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BACKGROUND The ozonation of grains in a closed system at low pressure is a strategy with the potential for treating packaged products. Research is necessary to characterize the reaction kinetics of ozone in this type of injection system so that it is possible to design chambers and determine the ozone concentrations suitable for commercial‐scale applications. The objective of this study was therefore to characterize the low‐pressure ozone injection system in relation to the physical properties of the grains and determine possible changes in their quality. Samples (5 kg each) of common beans, cowpea beans, corn, popcorn kernels, paddy rice, and polished rice were exposed to ozone in a 70 L hypobaric chamber. Initially, the internal pressure of the chamber was reduced to 500 hPa. Then, ozone was injected at a concentration of 32.10 g m−3 at a volumetric flow rate of 1 L min−1 until reaching a pressure of 1000 hPa. To relate the decomposition of ozone to the grains that were being evaluated, different physical properties were determined, and quality analysis was conducted. RESULTS Ozone gas half‐life outside and inside the package depended on the grain type. Ozone decomposition was quickest in polished rice and slowest in common beans. The half‐life of the different grains ranged from 17.8 to 52.9 and 16.4 to 52.9 min, outside and inside the package, respectively. Considering the physical properties, specific surface (Ss), surface area (SA), and sphericity (φ) exhibited a significant correlation with the decomposition rate constant (k) of ozone. However, the variables volume (V), permeability (K), porosity (ε), and specific mass (ρ) showed no correlation with k. CONCLUSION The physical properties of grain influenced the reaction kinetics of ozone gas during the low‐pressure injection process. Ozone gas injection at low pressures did not alter the quality attributes of the grains under study. © 2022 Society of Chemical Industry.

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“…Ozone is a strong oxidizing agent that attacks an organic substance at low pH, or it can also be used to generate hydroxyl radicals by modifying pH, and thus, hydroxyl radicals can do their part [12]. A recent study on the removal of pesticide residues from rice grains reported that residues of deltamethrin (92.7% removal) and bifenthrin (91.1% removal) residues were effectively removed from stored rice grains using ozone as a degrading agent [13].…”

Section: Conventional Methods Of Pesticide Removalmentioning

confidence: 99%

Role of Microbes and Nanomaterials in the Removal of Pesticides from Wastewater

Roy

Alghamdi

et al. 2022

International Journal of Photoenergy

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Pesticides are a class of xenobiotic compounds that are recalcitrant and show persistence in the environment for a longer period of time. Research studies have linked their potential for mutagenicity, teratogenicity, and carcinogenicity. The accumulation of pesticides in water sources due to runoff from agricultural lands has posed a serious threat to the biota of the water ecosystem as well as to the human population. Long-term exposure to pesticides can cause neurological disorders, reproductive complications, cancer, immunological, and pulmonary diseases. The use of pesticides has dramatically surged in agricultural as well as nonagricultural practices. Tons of pesticides are applied in the fields, but a limited amount reaches to the target organism while the rest is wasted and gets accumulated in soil or ends up in water sources like groundwater or river, which results in eradication of nontarget organisms. A variety of pesticides are used for pest management, such as organochlorine (DDT), carbamates (carbaryl), organophosphates (malathion), and pyrethroids (pyrethrins). These chemicals are highly toxic to flora and fauna because of their nonbiodegradable and persistence nature. Biomagnification of pesticides usually leads to cause various problems in human beings. Organochlorines like DDT have been banned in many developed countries due to these reasons. Therefore, the removal of pesticides from wastewater and natural water sources is of utmost importance. Conventional methods possess various limitations; therefore, there is a requirement of an alternative method which can efficiently remove these pollutants from the wastewater. In this review, environmental impacts and health-related complications of pesticides and microbial remediation approaches and use of different nanomaterials in the pesticide removal have been discussed.

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Ozone as degradation agent of pesticide residues in stored rice grains

Cited by 17 publications

References 30 publications

A Refined Nontarget Workflow for the Investigation of Metabolites through the Prioritization by in Silico Prediction Tools

A Refined Nontarget Workflow for the Investigation of Metabolites through the Prioritization by in Silico Prediction Tools

Low‐pressure ozone injection system: relationship between reaction kinetics and physical properties of grains

Role of Microbes and Nanomaterials in the Removal of Pesticides from Wastewater

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