Photodegradation kinetics, mechanism and aquatic toxicity of deltamethrin, permethrin and dihaloacetylated heterocyclic pyrethroids

Zhu, Qi; Yang, Yang; Lao, Zhiting; Zhong, Yingying; Zhang, Kun; Zhao, Suqing

doi:10.1016/j.scitotenv.2020.142106

Cited by 27 publications

(16 citation statements)

References 30 publications

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“…73 Take LC 50 , for example, the toxicity predicted by the ECOSAR program may be categorized into four groups: very toxic (0.0–1.0 ppm), toxic (1–10 ppm), harmful (10–100 ppm), and not harmful (above 100 ppm). 31,74,75…”

Section: Resultsmentioning

confidence: 99%

“…73 Take LC 50 , for example, the toxicity predicted by the ECOSAR program may be categorized into four groups: very toxic (0.0-1.0 ppm), toxic (1-10 ppm), harmful (10-100 ppm), and not harmful (above 100 ppm). 31,74,75 Based on the predicted concentrations (Table S6 †), the degradation products were divided into two categories, one with lower toxicity than ciprofloxacin and the other with higher toxicity than ciprofloxacin. The radar plots (Fig.…”

Section: Ecological Risk Prediction and Evaluationmentioning

confidence: 99%

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Experimental study and quantum chemical calculation of free radical reactions in ciprofloxacin degradation during the UV/chlorine oxidation process

Yuan

Tang

et al. 2022

Environ. Sci.: Water Res. Technol.

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Section: Resultsmentioning

confidence: 99%

Section: Ecological Risk Prediction and Evaluationmentioning

confidence: 99%

Experimental study and quantum chemical calculation of free radical reactions in ciprofloxacin degradation during the UV/chlorine oxidation process

Yuan

Tang

et al. 2022

Environ. Sci.: Water Res. Technol.

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“…Food safety is of paramount importance to the global food supply chain [ 6 , 7 ]. Pesticides are used for repelling, destroying, or preventing pests but if their residues remain in the crops, these pesticides result in serious health hazards, such as causing immune dysfunction, Parkinson’s disease, cancer, toxicity in children, and cytotoxic defects [ 8 , 9 ]. The use of different pesticides on crops, without respecting recommended time intervals and good agricultural practices result in pesticide residue accumulation in the inner parts of crops or vegetables.…”

Section: Introductionmentioning

confidence: 99%

Green photosensitisers for the degradation of selected pesticides of high risk in most susceptible food: A safer approach

et al. 2021

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Pesticides are the leading defence against pests, but their unsafe use reciprocates the pesticide residues in highly susceptible food and is becoming a serious risk for human health. In this study, mint extract and riboflavin were tested as photosensitisers in combination with light irradiation of different frequencies, employed for various time intervals to improve the photo-degradation of deltamethrin (DM) and lambda cyhalothrin (λ-CHT) in cauliflower. Different source of light was studied, either in ultraviolet range (UV-C, 254 nm or UV-A, 320–380 nm) or sunlight simulator (> 380–800 nm). The degradation of the pesticides varied depending on the type of photosensitiser and light source. Photo-degradation of the DM and λ-CHT was enhanced by applying the mint extracts and riboflavin and a more significant degradation was achieved with UV-C than with either UV-A or sunlight, reaching a maximum decrement of the concentration by 67–76%. The light treatments did not significantly affect the in-vitro antioxidant activity of the natural antioxidants in cauliflower. A calculated dietary risk assessment revealed that obvious dietary health hazards of DM and λ-CHT pesticides when sprayed on cauliflower for pest control. The use of green chemical photosensitisers (mint extract and riboflavin) in combination with UV light irradiation represents a novel, sustainable, and safe approach to pesticide reduction in produce.

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“…21,22 Nowadays, several reports of PER concentrated on the biological implications, such as strain ZH-14, 23,24 pyrethroid carboxylesterase PytH, 25 and photodegradation pathways. 26 Several studies have reported the heterogeneous reaction of PER and ozone to speculate one reaction path of PER. 27 The mechanism of ozonolysis of PER in the atmosphere has not been discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

“…Ozone, one of the most critical common atmospheric oxidants, is available in the daytime or nighttime. It has an extreme additive activity to unsaturated hydrocarbons and aromatic compounds, and it plays a significant role in the degradation of pollutants. , Nowadays, several reports of PER concentrated on the biological implications, such as strain ZH-14, , pyrethroid carboxylesterase PytH, and photodegradation pathways . Several studies have reported the heterogeneous reaction of PER and ozone to speculate one reaction path of PER .…”

Section: Introductionmentioning

confidence: 99%

Ozonolysis of Permethrin in the Atmosphere: Mechanism, Kinetics, and Evaluation of Toxicity

Huo

et al. 2021

J. Phys. Chem. A

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Pyrethroid, a pesticide widely used worldwide, could mimic, block, or synergize the effects of endogenous hormones in humans or mammals after entering into the atmosphere and after being sprayed and applied in large quantities. This research aims to study the mechanism, kinetics, and eco-toxicity evaluation of the ozonolysis of permethrin (PER)one of the typical pyrethroid (type I) pesticides. Existing experimental studies only predicted that ozonolysis of PER could generate a cycloperoxy analogue of PER (IM13-1-11), and the reaction mechanism has not yet been completed. To make up for the lack of experimental results, the 13 primary reaction pathways of PER and ozone, as well as the subsequent reactions of Criegee intermediates with small molecules such as NO x , CO x , SO2, and O2, have been studied to propose new reaction paths by quantum chemical calculations in this work. We calculated the total reaction rate constant of PER and ozone at 298 K and 1 atm based on the calculated thermodynamic data and the transition state theory (TST), which was compared with the experimental values to prove the reliability of our results. Based on the quantitative structure and activity relationship, we predicted the acute and chronic toxicity of PER and its products of ozonolysis to three representative organismsfish, daphnia, and green algae to avoid animal experiments. The results show that ozonolysis products of PER are still extremely harmful to the environment and should be taken seriously, although the products have less toxicity than PER.

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Photodegradation kinetics, mechanism and aquatic toxicity of deltamethrin, permethrin and dihaloacetylated heterocyclic pyrethroids

Cited by 27 publications

References 30 publications

Experimental study and quantum chemical calculation of free radical reactions in ciprofloxacin degradation during the UV/chlorine oxidation process

Experimental study and quantum chemical calculation of free radical reactions in ciprofloxacin degradation during the UV/chlorine oxidation process

Green photosensitisers for the degradation of selected pesticides of high risk in most susceptible food: A safer approach

Ozonolysis of Permethrin in the Atmosphere: Mechanism, Kinetics, and Evaluation of Toxicity

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