Gamma radiation induced degradation of the phenoxy acid herbicide diclofop-methyl in aqueous solutions

Zaouak, Amira; Noomen, Ahlem; Jelassi, Haikel

doi:10.1016/j.apradiso.2019.108939

Cited by 11 publications

(6 citation statements)

References 34 publications

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“…The slowing down phase obtained later is in favour of much slower degradation of formed aliphatic intermediates by cleavage of the long chains into carbon dioxide and water. Similar results have been obtained in previous studies (LaVerne et al 2000 ; Ponomarev et al 2020 ; Sánchez-Polo et al 2009 ; Zaouak et al 2020 , 2021a , b ).…”

Section: Resultssupporting

confidence: 91%

“…The same behaviour was amply described in the literature and could be explained by the important role of the hydroxyl radicals, issuing by water radiolysis, which react rapidly and with non-selectively with organic matter leading to low molecular weight products like carboxylic acids which ultimately transformed into carbon dioxide and water after successive hydroxyl radical’s attacks (LaVerne. 2000 ; Ponomarev et al 2020 ; Sánchez-Polo et al 2009 ; Zaouak et al 2020 , 2021a , b ).…”

Section: Resultsmentioning

confidence: 99%

“…However, increasing the concentration of solvated electrons at high pH leads to a decrease in the concentration of hydroxyl radicals so that the redox reaction is extremely rapid (Brillas et al 2009 ; Zaouak et al 2020 ). For all these reasons, the best efficiency is obtained at pH = 6.2 when all reactive species are free and are not involved in others reactions.…”

Section: Resultsmentioning

confidence: 99%

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Impact of gamma-irradiation on the degradation and mineralization of hydroxychloroquine aqueous solutions

Zaouak

Jebali

Chouchane

et al. 2022

Int. J. Environ. Sci. Technol.

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In this work, the effect of gamma irradiation emitted by Cobalt 60 source has been investigated for the degradation of hydroxychloroquine (HCQ). The monitoring of the gamma irradiation treatment of HCQ aqueous solutions was followed by UV–visible, chemical oxygen demand, total organic carbon (TOC) and LC/MS analyses. Effects of several important parameters such as concentration, dose rate and pH on the degradation efficiency were studied then evaluated. Achieved results showed that % TOC removal efficiency of 98.5 was obtained after 8 kGy absorbed dose which warrants HCQ mineralization. The process was found to be more efficient when the initial pollutant concentration was low, with higher dose rate and at neutral pH. Furthermore, HCQ degradation kinetic study revealed a pseudo-first-order kinetic. Additionally, based on by-products identified by LC/MS, a degradation mechanistic schema mediated through hydroxyl radicals generated by water radiolysis has been proposed. Finally, in order to check the potential industrial application viability the energy consuming was evaluated.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Impact of gamma-irradiation on the degradation and mineralization of hydroxychloroquine aqueous solutions

Zaouak

Jebali

Chouchane

et al. 2022

Int. J. Environ. Sci. Technol.

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“…Gamma irradiation technology uses reactive species (according to the eq. 1) to degrade toxic or resistant organic pollutants [69,70]. [Ir]=0.3 M CPF=55.56%…”

Section: Gamma Irradiation Technologymentioning

confidence: 99%

Advanced oxidation processes for chlorpyrifos removal from aqueous solution: a systematic review

Sheikhi

Dehghanzadeh

Aslani

2021

J Environ Health Sci Engineer

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Chlorpyrifos (CPF), an organophosphate insecticide, due to its high efficiency and low cost is widely used in the agricultural industry. CPF may lead to lung deficiency, central nervous system damage, developmental and autoimmune disorders. In recent decades, the advanced oxidation processes (AOPs) have been considered in water and wastewater treatment due to their high efficiency in decomposition of organic and inorganic compounds, specially hardly biodegradable or non-biodegradable compounds. In the present review study, the most common AOPs (such as Fenton and Photo-Fenton processes, UV/H 2 O 2 photolysis, UV/TiO 2 heterogeneous photo catalysis, electrochemical processes, sonolysis technology, gamma irradiation technology and sulfate-based AOPs) applied for CPF removal from aqueous matrices has been investigated. It can be concluded that the use of AOPs are effective for CPF removal from aqueous media. In addition, Fenton and photocatalytic processes appear to be the most common techniques for CPF degradation.

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“…Though modern analytical techniques such as HPLC, LC-MS, and SPE-HPLC-NMR can achieve rapid identification and full structural characterization of constituents in complex matrixes, it was difficult that provide related information about biologically active ingredients. Magnetic ligand fishing detects active ingredients by binding affinity directly from the crude extract without the process of prepurification ( 13 ). However, when some ingredients produced false-positive results in ligand fishing due to the non-specific binding of immobilized enzymes, the risk can be effectively reduced by docking the protein structure of COX-2.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Ligand Fishing Using Immobilized Cyclooxygenase-2 for Identification and Screening of Anticoronary Heart Disease Ligands From Choerospondias axillaris

Miaomiao¹,

Wang²,

Yan³

et al. 2022

Front. Nutr.

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Inhibition of cyclooxygenase-2 (COX-2) activity is an effective way for treatment of coronary heart disease. And as an important source of COX-2 inhibitors, bioactive compounds of Choerospondias axillaris and pharmacological mechanisms remained lacking in prospective researches. Therefore, for the purpose of accelerating the discovery of natural products targeting designed inhibitors, the COX-2 microreactor composed of functionalized microspheres and magnetic ligand fishing was developed and applied in Choerospondias axillaris, and the physicochemical properties of the COX-2 functionalized microspheres were characterized using Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Furthermore, the bioactive compounds singled out from ethanol decoction without prepurification were dissociated and identified by ultraperformance liquid chromatography plus Q-Exactive Orbitrap tandem mass spectrometry (UPLC-Q-Exactive Orbitrap-MS/MS). Consequently, 21 bioactive compounds consisting of 6 organic acids, 8 flavonoids, and 7 others were separated and characterized from Choerospondias axillaris, which were reported to participate in the COX-2 inhibitory pathway to varying degrees. Therefore, this method could provide a prospective solution for the extraction and identification of active pharmaceutical ingredients and the rapid screening of some enzyme inhibitors in the complex mixtures.

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Gamma radiation induced degradation of the phenoxy acid herbicide diclofop-methyl in aqueous solutions

Cited by 11 publications

References 34 publications

Impact of gamma-irradiation on the degradation and mineralization of hydroxychloroquine aqueous solutions

Impact of gamma-irradiation on the degradation and mineralization of hydroxychloroquine aqueous solutions

Advanced oxidation processes for chlorpyrifos removal from aqueous solution: a systematic review

Magnetic Ligand Fishing Using Immobilized Cyclooxygenase-2 for Identification and Screening of Anticoronary Heart Disease Ligands From Choerospondias axillaris

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