Ozone saturation and decomposition kinetics in porous medium containing different hybrids of maize

Souza, Jefferson V. da S.; Alencar, Ernandes Rodrigues de; Junqueira, Ana Maria Resende; Oliveira, Gustavo Pires de

doi:10.1590/1807-1929/agriambi.v22n4p286-291

Cited by 12 publications

(14 citation statements)

References 20 publications

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“…The sigmoidal equation proposed in the present study adequately adjusted to the residual ozone concentration data as a function of the ozonation period for quinoa seeds, with a determination coefficient (R 2 ) of 0.96. This type of equation has been used by others, who obtained satisfactory results for peanuts (Alencar et al, 2011), common corn and sweet corn (J. V. S. Souza et al, 2018), popcorn (Silva et al, 2019), and Brazil nuts (Oliveira et al, 2020).…”

Section: Ozone Saturation Process and Decomposition Kineticsmentioning

confidence: 99%

“…V. S. Souza et al, 2018), popcorn (Silva et al, 2019), and Brazil nuts (Oliveira et al, 2020). In the present study, a saturation time of 12.0 min was obtained for a saturation concentration of 522.5 ppm.…”

Section: Ozone Saturation Process and Decomposition Kineticsmentioning

confidence: 99%

“…Additionally, according to these authors, after the elimination Data referring to ozone saturation in porous media for different grains are found in the literature. J. V. S. Souza et al (2018) ozonized different corn varieties, including common corn and sweet corn, and obtained saturation times between 6.5 and 164 min. These authors indicated the possibility that physical properties may influence the saturation process of the porous medium, in addition to the chemical composition of the grains.…”

Section: Ozone Saturation Process and Decomposition Kineticsmentioning

confidence: 99%

“…In contact with organic matter, such as grains and seeds, the decomposition process is accelerated, which makes it essential to conduct studies to verify the behavior of the gas in contact with different materials. Data are available in the literature regarding the saturation and decomposition of ozone in a porous medium containing different grains, such as of corn (Zea mays L.) (J. V. S. Souza, Alencar, Junqueira, & Oliveira, 2018;Silva et al, 2019), peanuts (Arachis hypogaea L.) (Alencar, Faroni, Martins, Costa, & Cecon, 2011), and rice (Oryza sativa L.) (Pandiselvam, Venkatachalam, & Rajamani, 2015;Santos, Faroni, Cecon, Ferreira, & Pereira, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Ozonation of quinoa seeds (Chenopodium quinoa Willd.): saturation and decomposition kinetics of ozone and physiological quality of seeds

Alencar

Jojoa

Silva

et al. 2021

Semina: Ciênc. Agrár.

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Ozonation has been evaluated as an alternative method for seed treatment. In this context, the goal of this study was to evaluate the saturation process and kinetics of decomposition of ozone in a porous medium composed of quinoa BRS Syetetuba and possible changes in seed quality. Ozone concentration and saturation time in the porous medium and half-life were determined by adopting an inlet ozone concentration of 885 ppm and a flow rate of 5.0 L min-1 at 25 °C. The ozonation periods adopted were 0, 30, 60, 90, and 120 min. Regarding the physiological quality of the seeds, the germination percentage, germination speed index, electrical conductivity, and length of the shoot, root, and normal seedlings were analyzed. At the inlet ozone concentration of 885 ppm and a flow rate of 5.0 L min-1, the saturation concentration and saturation time in the porous medium composed of quinoa were 522.5 ppm and 12.0 min, respectively. The half-life of ozone in the porous medium was 6.08 min at 25 °C. Under these conditions, ozonation did not affect the physiological quality of quinoa BRS Syetetuba seeds for up to 120 min.

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Section: Ozone Saturation Process and Decomposition Kineticsmentioning

confidence: 99%

Section: Ozone Saturation Process and Decomposition Kineticsmentioning

confidence: 99%

Section: Ozone Saturation Process and Decomposition Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ozonation of quinoa seeds (Chenopodium quinoa Willd.): saturation and decomposition kinetics of ozone and physiological quality of seeds

Alencar

Jojoa

Silva

et al. 2021

Semina: Ciênc. Agrár.

Self Cite

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“…Ozone gas also could effectively degrade mycotoxins such as aflatoxins, cyclopiazonic acid (CPA), fumonisin B 1 , ochratoxin A (OTA), patulin, secalonic acid D (SAD) and zearalenone (ZEN) [8], and degradation products are generally harmless. For example, ozone would react across the 8, 9 double bond of the furan ring of aflatoxin through electrophilic attack, causing the formation of primary ozonides followed by rearrangement into monozonide derivatives such as aldehydes, ketones and organic acids [9,10,11]. The double bond of the furan ring in AFB 1 caused its high toxicity, mutagenicity, and carcinogenic [12].…”

Section: Introductionmentioning

confidence: 99%

In vivo Toxicity Assessment after the Detoxification of Aflatoxin Compounds – Contaminated Wheat and Corn by Ozone Gas

El-Sisy

Salem

Nail

et al. 2020

ARRB

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Aflatoxins (AFs) are dangerous mycotoxins, which include a great number of lipophilic molecules produced by aerobic microscopic fungi belonging to the genus Aspergillus causes health hazard including death to human and livestock. The objective of this study was to evaluate the effectiveness of ozone gas treatment on the fungal growth and detoxification of AFs - contaminated wheat and corn grains. Ozone concentration treatments 40 mg / Kg wheat for 1 hour and 80 mg / Kg corn for 2 hours of exposure time respectively were applied to contaminated samples of wheat and corn grains. It was observed that completely inhibition of Aspergillus growth and consequently the total aflatoxin content was decreased. In vivo, the biosafety assessment for 72 male albino rats fed on diet containing 70% wt. of ozone treated AFs – contaminated grains were evaluated comparing to control groups. Results indicated that rats fed on AFs contaminated grains have significantly increased the serum enzymes activity of alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), gamma glutamyl transferase (GGT), malondialdehyde (MDA) content as well as the serum levels of creatinine, urea, glucose, total cholesterol (TC) and triglycerides (TG). Also, it was observed that a significant decrease in the level of serum total protein (TP), albumin (Alb), reduced glutathione (GSH) and testosterone hormone comparing to control groups. However, the oral administration of ozonized groups ameliorated the biochemical parameters compared to rats fed on contaminated grains. Moreover, histopathological studies of liver, kidney and testis tissues of rats fed on contaminated grains that revealed different lesions and changes in tissues, inversely to that improving effects in tissues of ozonized contaminated grains – fed rats. It was concluded that ozonization treatment were most effective in reduction of mold count and degradation of aflatoxins content for grains during storage.

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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 saturation and decomposition kinetics in porous medium containing different hybrids of maize

Cited by 12 publications

References 20 publications

Ozonation of quinoa seeds (Chenopodium quinoa Willd.): saturation and decomposition kinetics of ozone and physiological quality of seeds

Ozonation of quinoa seeds (Chenopodium quinoa Willd.): saturation and decomposition kinetics of ozone and physiological quality of seeds

In vivo Toxicity Assessment after the Detoxification of Aflatoxin Compounds – Contaminated Wheat and Corn by Ozone Gas

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

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