Evaluation of photolysis and hydrolysis of pyraclostrobin in aqueous solutions and its degradation products in paddy water

Zeng, Ling R; Shi, Li; Xiang, Meng; Xu, Jin; Jia, Gui F; Gui, Ting; Zhang, Yu P; Hu, De Y

doi:10.1080/03601234.2019.1571360

Cited by 27 publications

(12 citation statements)

References 33 publications

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“…While the UV dose from the lamp was not reported, the sunlight averaged 840 mW/cm 2 , much higher than the incident light from the lamps used in this study (5.01 ± 0.66 mW/cm 2 ). A half-life of 2.96-h and 3.69-h was reported for pyraclostrobin in paddy water under irradiation by the lamp and sunlight, respectively, showing that while sunlight was effective at degrading pyraclostrobin residues, the efficacy is diminished compared to that observed in the present study (Zeng et al, 2019). Lagunas-Allué et al (2012) have reported significant degradation of pyraclostrobin after irradiation at 365 nm of 25 mL of a 2.3 mg/L aqueous solution of pyraclostrobin which suggests pyraclostrobin may be susceptible to a wider range of UV light than boscalid.…”

Section: Resultscontrasting

confidence: 61%

“…Pyraclostrobin was the most affected by UV irradiation among the pesticides tested with a nearly 100% decrease in residue concentration (2.658 ± 0.149 mmol) within 30 s (112.5 mJ/cm 2 ) on glass and 2 min (555.6 mJ/cm 2 ) on apple skin (Tables 3 & 4). Zeng et al (2019) have previously studied the photolytic and hydrolytic degradation of pyraclostrobin in aqueous solutions under UV lamp and sunlight. While the UV dose from the lamp was not reported, the sunlight averaged 840 mW/cm 2 , much higher than the incident light from the lamps used in this study (5.01 ± 0.66 mW/cm 2 ).…”

Section: Resultsmentioning

confidence: 99%

“…Lagunas-Allué et al (2012) have reported significant degradation of pyraclostrobin after irradiation at 365 nm of 25 mL of a 2.3 mg/L aqueous solution of pyraclostrobin which suggests pyraclostrobin may be susceptible to a wider range of UV light than boscalid. Different transformation products of pyraclostrobin were identified by Zeng et al (2019) and Lagunas-Allué et al (2012) which suggests that the chromophore experiencing photoelectron transfer mediated transformation may differ depending on the wavelength of incident UV light. It should be noted that Lagunas-Allué et al (2012) studied the transformation products of the TiO 2 photocatalyzed elimination of pyraclostrobin which could also explain the difference in the observed oxidation products compared to Zeng et al (2019).…”

Section: Resultsmentioning

confidence: 99%

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Degradation ofboscalid, pyraclostrobin, fenbuconazole, andglyphosateresidues by an advanced oxidative process utilizing ultraviolet light and hydrogen peroxide

Skanes

Ho²,

Warriner³

et al. 2020

Preprint

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Recently an advanced oxidative process (AOP) combining H2O2 and UV-C light was observed to be effective at controlling Listeria monocytogens (Murray et al., 2018) and Escherichia coli O157:H7 and degrading chlorpyrifos residues on the surface of apples (Ho et al., 2020). Little is known about the application of AOP for the degradation of other pesticide residues. This study examined degradation of boscalid, pyraclostrobin, fenbuconazole and glyphosate by 3% (w/v) H2O2, UV-C (254 nm) irradiation and their combination on apple skin and glass. The extent of degradation was not significantly different between the AOP and optimal individual treatment. However, treatment susceptibility was different with glyphosate most effectively degraded by H2O2 exposure (up to 98% on apple, 3% (w/v) H2O2 at 30□C for 15 min) while boscalid, pyraclostrobin and fenbuconazole were more effectively degraded by UV-C (up to 88%, 100% and 70% degradation after ~11,000 mJ/cm2). Suggestions for possible causes of degradation are proposed.

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Section: Resultscontrasting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Degradation ofboscalid, pyraclostrobin, fenbuconazole, andglyphosateresidues by an advanced oxidative process utilizing ultraviolet light and hydrogen peroxide

Skanes

Ho²,

Warriner³

et al. 2020

Preprint

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“…Reddy et al (2013) reported that the organic matter content, microbial population and soil moisture affected the dissipation of pyraclostrobin, and their results showed the more rapid dissipation of pyraclostrobin under wet air conditions compared with dry conditions; moreover, the most rapid pyraclostrobin dissipation occurred in sludgeamended soil (t 1/2 9.2 days). Contrary to Reddy et al (2013); Zeng et al (2019) found that the degradation rate of pyraclostrobin was faster in aqueous solution under the UV photolysis reaction compared with that under sunlight. Unlike natural strobilurins that have the conventional methoxyacrylate or methoxyiminoacetate structure, mandestrobin possesses a unique methoxyacetamide moiety and showed resistance to alkaline hydrolysis (Adachi et al, 2018).…”

Section: Physicochemical Transformation Of Strobilurinsmentioning

confidence: 78%

An Overview of Strobilurin Fungicide Degradation:Current Status and Future Perspective

et al. 2020

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Strobilurin fungicides have been widely used in agricultural fields for decades. These pesticides are designed to manage fungal pathogens, although their broad-spectrum mode of action also produces non-target impacts. Therefore, the removal of strobilurins from ecosystems has received much attention. Different remediation technologies have been developed to eliminate pesticide residues from soil/water environments, such as photodecomposition, ozonation, adsorption, incineration, and biodegradation. Compared with conventional methods, bioremediation is considered a cost-effective and ecofriendly approach for the removal of pesticide residues. Several strobilurindegrading microbes and microbial communities have been reported to effectively utilize pesticide residues as a carbon and nitrogen source. The degradation pathways of strobilurins and the fate of several metabolites have been reported. Further indepth 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 strobilurins. The present review summarizes recent progress in strobilurin degradation and comprehensively discusses the potential of strobilurin-degrading microorganisms in the bioremediation of contaminated environments.

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“…Then, the fragment ion search (FISh) mode of Compound Discoverer™ was utilised for data processing of metabolites in vivo and in vitro. A large amount of data was extracted from the Compound Discoverer™ to obtain the retention time of the metabolite, type of reaction, and the secondary spectrum. They were used to infer possible metabolite structures.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of hederacoside C metabolites using ultrahigh‐performance liquid chromatography quadrupole Orbitrap mass spectrometry based on automatic fragment ion search

Jiang

Yang

Zhang

et al. 2020

Phytochemical Analysis

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Introduction Hederacoside C (HDC) is a bioactive natural triterpenoid saponins constituent originating from traditional Chinese medicines, playing an important role in the treatment of acute respiratory infections and chronic inflammatory bronchitis. Meanwhile, it is recognised by Korea as a botanical drug. Objectives In order to develop an integrated template approach to analysing screening and identification of the metabolites of traditional Chinese medicines. This study will provide available information for further pharmaceutical studies of HDC and other triterpene saponins. Methodology An analysis strategy based on ultrahigh‐performance liquid chromatography quadrupole Orbitrap mass spectrometry (UHPLC‐Q‐Orbitrap‐MS) technique combined with automatic fragment ion search (FISh) was firstly exploited for the characterisation metabolites of HDC in vivo and in vitro. Accurate full mass scan combined with an on‐line FISh annotations approach was developed to rapidly identify all the potential metabolites of HDC. Furthermore, FISh accurately located the structure of the target compound in a large number of mass spectral data. Results A total of 34 metabolites were detected and tentatively identified by analysing comprehensive biological samples. The results clearly demonstrated that HDC underwent general metabolic reactions including dealkylation, reduction, oxidation, desaturation, dehydration, cysteine conjugation, GSH conjugation, taurine conjugation, and glycine conjugation to produce 26 phase I and eight phase II metabolites. Conclusion In the present study, UHPLC‐Q‐Exactive Orbitrap MS technique combined with FISh provided a rapid and efficient platform to characterise metabolites of HDC in vivo and in vitro. The proposed method could develop an integrated template approach to screen and identify the constituents and metabolites of traditional Chinese medicines.

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Evaluation of photolysis and hydrolysis of pyraclostrobin in aqueous solutions and its degradation products in paddy water

Cited by 27 publications

References 33 publications

Degradation ofboscalid, pyraclostrobin, fenbuconazole, andglyphosateresidues by an advanced oxidative process utilizing ultraviolet light and hydrogen peroxide

Degradation ofboscalid, pyraclostrobin, fenbuconazole, andglyphosateresidues by an advanced oxidative process utilizing ultraviolet light and hydrogen peroxide

An Overview of Strobilurin Fungicide Degradation:Current Status and Future Perspective

Characterisation of hederacoside C metabolites using ultrahigh‐performance liquid chromatography quadrupole Orbitrap mass spectrometry based on automatic fragment ion search

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