Stable carbon isotope fractionation during the biodegradation of lambda-cyhalothrin

Shen, Xiaoli; Xu, Zhaojun; Zhang, Xichang; Yang, Fangxing

doi:10.1016/j.scitotenv.2015.05.045

Cited by 15 publications

(33 citation statements)

References 31 publications

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“…The absence of significant isotope changes might be less influenced by biodegradation, which is assumed to induce significant isotope changes in pesticides based on kinetic isotope fractionation (e.g., [ 7 ]). Like our results, other studies reported that pesticide δ 13 C compositions from sterilized soil (less dominated by microbial activity) showed a consistent pattern (on average δ 13 C < 1.0‰) for fenopropathrin, deltamethrin, α-cypermethrin [ 9 ], and lambda-cyhalothrin [ 8 ] under GC–IRMS. Even unsterilized soil (assuming active microbial biodegradation) showed a δ 13 C increase of approximately <2‰ within 40 days [ 8 , 9 ].…”

Section: Resultssupporting

confidence: 87%

“…Like our results, other studies reported that pesticide δ 13 C compositions from sterilized soil (less dominated by microbial activity) showed a consistent pattern (on average δ 13 C < 1.0‰) for fenopropathrin, deltamethrin, α-cypermethrin [ 9 ], and lambda-cyhalothrin [ 8 ] under GC–IRMS. Even unsterilized soil (assuming active microbial biodegradation) showed a δ 13 C increase of approximately <2‰ within 40 days [ 8 , 9 ]. Such a negligible isotope change was also reported in a short-term lab-scale experiment (similar to 45 days in this study) in other pesticides such as butachlor, S-metachlor, and metalaxyl as analyzed by GC–IRMS [ 7 ].…”

Section: Resultssupporting

confidence: 87%

“…This applicability is based on the fact that naturally occurring stable isotope compositions of elements (e.g., 13 C/ 12 C) in pesticide residues are closely related to stable isotope ratios of their source (parental compounds). Further, the carbon isotope ratio of the pesticide is changed only negligibly or slightly by plant absorption [ 6 , 7 ] and abiotic degradation processes (e.g., photolysis and hydrolysis) [ 8 ]. In contrast, soil type (sterile vs. non-sterile soil) and biodegradation processing fairly increase carbon isotope ratios in pesticides <13.5‰, e.g., throughout the incubation period (e.g., from days to months) [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…Microorganisms tend to metabolize chemical substances with lighter isotopes of elements (e.g., 12 C) because of the lower energy required for breaking the bonds with the lighter isotope (i.e., the kinetic isotope effect). Thus, biodegradation leads to more compounds with heavier isotopes of elements (e.g., 12 C) remaining in the substrates than those with the lighter isotope, increasing the stable isotope variables [ 8 , 9 ]. Such distinctive isotopic variability in pesticides from abiotic or biodegradation processing helps detect the dynamic behavior of pesticide molecules in environments [ 3 , 6 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

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Stable Isotope Analysis of Residual Pesticides via High Performance Liquid Chromatography and Elemental Analyzer–Isotope Ratio Mass Spectrometry

et al. 2022

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To broaden the range of measurable pesticides for stable isotope analysis (SIA), we tested whether SIA of the anthranilic diamides cyantraniliprole (CYN) and chlorantraniliprole (CHL) can be achieved under elemental analyzer/isotope ratio mass spectrometry with compound purification in high-performance liquid chromatography (HPLC). Using this method, carbon isotope compositions were measured in pesticide residues extracted from plants (lettuce) grown indoors in potting soil that were treated with 500 mg/kg CHL and 250 mg/kg CYN and were followed up for 45 days. Our results show that the CYN and CHL standard materials did not have significant isotope differences before and after clean-up processing in HPLC. Further, when applied to the CYN product and CHL product in soil, stable isotope differences between the soil and plant were observed at <1.0‰ throughout the incubation period. There was a slight increase in the variability of pesticide isotope ratio detected with longer-term incubation (CHL, on average 1.5‰). Overall, we measured the carbon isotope ratio of target pesticides from HPLC fraction as the purification and pre-concentration step for environmental and biological samples. Such negligible isotopic differences in pesticide residues in soils and plants 45 days after application confirmed the potential of CSIA to quantify pesticide behavior in environments.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stable Isotope Analysis of Residual Pesticides via High Performance Liquid Chromatography and Elemental Analyzer–Isotope Ratio Mass Spectrometry

et al. 2022

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“…Pyrethroid degradation studies with compound-specific stable isotope assays have focused on biodegradation, using CSIA to study the microbial degradation of lambda-cyhalothrin in soil. 90 Changes in the carbon isotope ratio have been observed, and the enrichment factor ε of lambda-cyhalothrin has been identified. This may be because soil biodegradation is mainly responsible for lambda-cyhalothrin disintegration.…”

Section: Pesticide Categories and Csia Technologymentioning

confidence: 99%

Photodegradation of pesticides using compound-specific isotope analysis (CSIA): a review

et al. 2021

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Degradation Processes of Pesticides Used in Potato Cultivations

Kurek

Barchańska

Turek

2016

Reviews of Environmental Contamination and Toxicology

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Potato is one of the most important crops, after maize, rice and wheat. Its global production is about 300 million tons per year and is constantly increasing. It grows in temperate climate and is used as a source of starch, food, and in breeding industry.Potato cultivation requires application of numerous agro-technical products, including pesticides, since it can be affected by insects, weeds, fungi, and viruses. In the European Union the most frequently used pesticides in potato cultivations check are: thiamethoxam, lambda-cyhalothrin and deltamethrin (insecticides), rimsulfuron (herbicide) and metalaxyl (fungicide).Application of pesticides improves crop efficiency, however, as pesticides are not totally selective, it affects also non-target organisms. Moreover, the agrochemicals may accumulate in crops and, as a consequence, negatively influence the quality of food products and consumer health. Additional risks of plant protection products are related to their derivatives, that are created both in the environment (soil, water) and in plant organisms, since many of these compounds may exhibit toxic effects.This article is devoted to the degradation processes of pesticides used in potato crop protection. Attention is also paid to the toxicity of both parent compounds and their degradation products for living organisms, including humans. Information about the level of pesticide contamination in the environment (water, soil) and accumulation level in edible plants complement the current knowledge about the risks associated with widespread use of thiamethoxam, lambda-cyhalothrin and deltamethrin, rimsulfuron and metalaxyl in potato cultivation.

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Stable carbon isotope fractionation during the biodegradation of lambda-cyhalothrin

Cited by 15 publications

References 31 publications

Stable Isotope Analysis of Residual Pesticides via High Performance Liquid Chromatography and Elemental Analyzer–Isotope Ratio Mass Spectrometry

Stable Isotope Analysis of Residual Pesticides via High Performance Liquid Chromatography and Elemental Analyzer–Isotope Ratio Mass Spectrometry

Photodegradation of pesticides using compound-specific isotope analysis (CSIA): a review

Degradation Processes of Pesticides Used in Potato Cultivations

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