Degradation kinetics of pirimiphos-methyl residues in maize grains exposed to ozone gas

Freitas, Romenique da Silva de; Faroni, L. R. D.; Queiroz, Maria Eliana Lopes Ribeiro de; Heleno, Fernanda Fernandes; Prates, Lucas Henrique Figueiredo

doi:10.1016/j.jspr.2017.08.008

Cited by 36 publications

(13 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Even so, the results found here demonstrate that gaseous ozonation can be a good method to remediate corn grit contamination by aflatoxins, especially regarding AFB1 and AFG1 contamination. Other studies on corn dealing with the detoxification of the mycotoxins zearalenone and ochratoxin [31] and the degradation of pirimiphos-methyl residues [32] show a great reduction of those compounds after ozone application. Those results are in accordance with our study, indicating that ozone exhibits a remarkable potential in reducing various mycotoxins and toxic compounds in corn while minimally affecting its quality.…”

Section: Discussionmentioning

confidence: 99%

Gaseous Ozonation to Reduce Aflatoxins Levels and Microbial Contamination in Corn Grits

et al. 2019

View full text Add to dashboard Cite

Corn is one of the most cultivated cereals in Brazil. However, its grains are constantly exposed to contamination by mycotoxins. Corn grits are used by the food industry to produce a large variety of corn products such as canjiquinha, a cultural food easily purchased by the Brazilian consumer at low prices. Some studies have demonstrated high contamination of this product by aflatoxins (AFs), representing a potential risk of exposure due to such a contamination. In this study, the efficacy of gaseous ozonation was evaluated on the levels of aflatoxins and on the microbial contamination of corn grits. The application of gaseous ozone was tested in different combinations of exposure time, ozone concentration, and canjiquinha mass. After the ozonation treatment, samples were collected for aflatoxin and microbiological analyses. Aflatoxins were evaluated using a high-performance liquid chromatography with fluorescence detection (HPLC-FD) system using pre-column derivatization, and the microbiological analyses were carried out for toxin-producer fungi and mesophilic bacteria. After ozone detoxification, results showed reductions up to 57% in aflatoxin levels. Total fungal count was reduced around 3.0 cycles log CFU g−1 and total mesophilic counts were reduced to non-detectable levels. These results demonstrated that ozonation is an effective alternative for reducing aflatoxin and microbial contamination in products like canjiquinha, thereby improving food safety.

show abstract

Section: Discussionmentioning

confidence: 99%

Gaseous Ozonation to Reduce Aflatoxins Levels and Microbial Contamination in Corn Grits

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The traditional fungal control methods applied during storage (fungicides applications) and in the food industry (thermal treatments) can leave toxic compounds residues and/or induce texture alterations (Niemira, 2012;Misra et al, 2011;Freitas et al, 2017). Therefore, methods that are not aggressive for grains and effective on spores' inactivation are required (Savi et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of cold plasma on black beans (Phaseolus vulgaris L.), fungi inactivation and micro-structures stability

Runtzel

Silva²,

Silva

et al. 2019

Emir J Food Agric

View full text Add to dashboard Cite

The Cold Plasma (CP) treatment efficiency to inactivate naturally fungi contaminated beans (Phaseolus vulgaris L.), Class black, and the effects in micro-structures stability were investigated. Kernels were exposed to CP (8 kv intensity and 510W power) at different times (5, 10, 20 and 30 min) followed by incubation to verify the antifungal effect and their micro-structural resistance through microscopy (stereo –SM and scanning electron - SEM) observation. The treatment was effective to fungal inactivation when exposed to CP (10-30 min). It also inhibited bean germination during the longest treatment exposure (20-30 min). Regarding germination, only when CP was applied during the shortest period of time (5 min) had a positive effect (improved its speed: hypocotyl & radicle length increased), when compared to Control. Some morphological alterations were registered by SM, either on testae (wrinkling) and cotyledons (color changes). Indeed, through SEM, both testae and cotyledon structures showed the disrupting effects on their cell membranes during the treatment more power. The CP treatment, under the current conditions applied, showed effective for fungi inactivation, although it affected some kernel micro-structures and germination. Therefore, further studies will be carried out regarding adjustments on CP conditions, to improve treated beans quality.

show abstract

“…Ozone treatment can efficiently and accurately degrade a large amount of pesticide residue in a short period of time. For example, de Freitas et al (2017) confirmed that 0.86 mg L À1 gaseous ozone effectively degrades more than 91% of pirimiphos-methyl residue in maize grains within 60 min. Bourgin et al (2013) found that imidacloprid on loaded seeds almost fully decomposes (95%) by 32 min under the influence of ozone gas (100 mg L À1 ).…”

Section: High Efficiencymentioning

confidence: 78%

“…For example, de Freitas et al . () confirmed that 0.86 mg L −1 gaseous ozone effectively degrades more than 91% of pirimiphos‐methyl residue in maize grains within 60 min. Bourgin et al .…”

Section: High Efficiencymentioning

confidence: 99%

Effects of ozone treatment on pesticide residues in food: a review

Wang

et al. 2018

Int J of Food Sci Tech

View full text Add to dashboard Cite

Summary In agriculture, pesticide residues have always posed a major safety hazard to human health. With the development of agricultural production and improvements in science and technology, additional methods for degradation of pesticide residues have emerged. Amongst them, ozone treatment recently became a popular method owing to its outstanding technical advantages. This review is an in‐depth analysis of the mechanisms by which ozone treatment degrades pesticide residues. The main mechanism involves direct oxidation by oxygen atoms, and indirect oxidation driven by hydroxyl radicals. The effects of ozone treatment on pesticide residues in food with respect to the ozone concentration, duration of ozone treatment, type of food, variety of pesticides, level of pesticide residues and environmental factors have been discussed. Furthermore, the impact of ozone treatment on the quality of food is highlighted. Low levels of ozone result in minor changes to the visual and sensory characteristics of food. In addition, this article discusses several restrictions surrounding the current application of ozone treatment for the degradation of pesticide residues. More specifically, the most crucial issue is the potential toxicity of ozonation byproducts generated by the process, which is also the current focus of research on ozone treatment for the degradation of pesticide residues. After weighing the advantages and disadvantages of ozone treatment, it is recommended as a method of degrading pesticide residues.

show abstract

Degradation kinetics of pirimiphos-methyl residues in maize grains exposed to ozone gas

Cited by 36 publications

References 24 publications

Gaseous Ozonation to Reduce Aflatoxins Levels and Microbial Contamination in Corn Grits

Gaseous Ozonation to Reduce Aflatoxins Levels and Microbial Contamination in Corn Grits

Effect of cold plasma on black beans (Phaseolus vulgaris L.), fungi inactivation and micro-structures stability

Effects of ozone treatment on pesticide residues in food: a review

Contact Info

Product

Resources

About