Characterizing chemical transformation of organophosphorus compounds by 13C and 2H stable isotope analysis

Wu, Langping; Chládková, Barbora; Lechtenfeld, Oliver J.; Lian, Shujuan; Schindelka, Janine; Herrmann, Hartmut; Richnow, Hans H.

doi:10.1016/j.scitotenv.2017.09.233

Cited by 43 publications

(34 citation statements)

References 42 publications

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“…After pesticides are applied to the target organism, they are degraded by microbes, chemical reactions, or light [37]. Depending on the environmental conditions and the pesticide's chemical characteristics [38], degradation may take from hours to days or even years [39]. Pesticide degradation processes control pesticide persistence in soils and yield different metabolites [40].…”

Section: Pesticide Degradationmentioning

confidence: 99%

“…Increased average temperature leads to a lower level of soil organic matter and results in enhanced potential for soil erosion with increased rates of the movement of water as well as organic and inorganic chemicals [91]. Moreover, owing to temperature increases, the capacity of soil to store and cycle carbon is altered [92], and the size and frequency of crack formation in soils will probably increase [38]. Bloomfield et al (2006) further indicate that crack formation will lead to a more rapid and direct movement of water and solutes from the soil surface to a depth or directly to field drains, which could result in losses of pesticides in target areas and cause the pollution of ground and surface water.…”

Section: Influence On Soil Condition and Crop Growthmentioning

confidence: 99%

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Agriculture Development, Pesticide Application and Its Impact on the Environment

Tudi

Ruan

Wang

et al. 2021

IJERPH

916

354

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Pesticides are indispensable in agricultural production. They have been used by farmers to control weeds and insects, and their remarkable increases in agricultural products have been reported. The increase in the world’s population in the 20th century could not have been possible without a parallel increase in food production. About one-third of agricultural products are produced depending on the application of pesticides. Without the use of pesticides, there would be a 78% loss of fruit production, a 54% loss of vegetable production, and a 32% loss of cereal production. Therefore, pesticides play a critical role in reducing diseases and increasing crop yields worldwide. Thus, it is essential to discuss the agricultural development process; the historical perspective, types and specific uses of pesticides; and pesticide behavior, its contamination, and adverse effects on the natural environment. The review study indicates that agricultural development has a long history in many places around the world. The history of pesticide use can be divided into three periods of time. Pesticides are classified by different classification terms such as chemical classes, functional groups, modes of action, and toxicity. Pesticides are used to kill pests and control weeds using chemical ingredients; hence, they can also be toxic to other organisms, including birds, fish, beneficial insects, and non-target plants, as well as air, water, soil, and crops. Moreover, pesticide contamination moves away from the target plants, resulting in environmental pollution. Such chemical residues impact human health through environmental and food contamination. In addition, climate change-related factors also impact on pesticide application and result in increased pesticide usage and pesticide pollution. Therefore, this review will provide the scientific information necessary for pesticide application and management in the future.

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Section: Pesticide Degradationmentioning

confidence: 99%

Section: Influence On Soil Condition and Crop Growthmentioning

confidence: 99%

Agriculture Development, Pesticide Application and Its Impact on the Environment

Tudi

Ruan

Wang

et al. 2021

IJERPH

916

354

View full text Add to dashboard Cite

show abstract

“…Detailed soil and sub-event CSIA data allowed us to determine the evolution of pesticide degradation extent and export losses across the catchment. Additional insights on mechanisms of bond cleavage however, could have been obtained using multi-element CSIA of nitrogen, hydrogen or chlorine (Wu et al, 2018). Unfortunately, the ability to implement multi-element isotope analysis was reduced by current limitations in CSIA quantification from environmental samples.…”

Section: Perspectives For Pesticide Csia Applications At Catchment Scalementioning

confidence: 99%

Pesticide degradation and export losses at the catchment scale: Insights from compound-specific isotope analysis (CSIA)

et al. 2018

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Although pesticides undergo degradation tests prior to use, determining their export, degradation and persistence under field conditions remains a challenge for water resource management. Compound specific isotope analysis (CSIA) can provide evidence of contaminant degradation extent, as it is generally independent of non-destructive dissipation (e.g., dilution, sorption, volatilization) regulating environmental concentrations. While this approach has been successfully implemented in subsurface environments, its application to pesticides in near-surface hydrological contexts at catchment scale is lacking. This study demonstrates the applicability of CSIA to track pesticide degradation and export at catchment scale and identify pesticide source areas contributing to changes in stable isotope signature in stream discharge under dynamic hydrological contexts. Based on maximum shifts in carbon stable isotope signatures (ΔδC  = 4.6 ± 0.5‰) of S-metolachlor (S-met), a widely used herbicide, we estimate maximum degradation to have reached 96 ± 3% two months after first application. Maximum shifts in nitrogen isotope signatures were small and inverse (ΔδN=-1.3±0.6‰) indicating potential secondary isotope effects during degradation. In combination with a mass balance approach including S-met main degradation products, total catchment non-destructive dissipation was estimated to have reached 8 ± 7% of the applied product. Our results show that CSIA can be applied to evaluate natural attenuation of pesticides at catchment scale. By providing a more detailed account of pesticide dissipation and persistence under field conditions we anticipate the contribution of pesticide CSIA to the improvement of regulatory and monitoring strategies.

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“…The photodegradation process is was also inuenced by pH. Thus, it 27 The P-O bonds in phosphates are resistant to inorganic hydrolysis, thus any changes observed in oxygen isotope composition ( 18 O/ 16 O) may be used as a signature to distinguish phosphonates from phosphor-esters and organophosphorus, due to the changes in the phosphate d 18 O. 47,48 Sandy et al 29 used the oxygen isotope labelling of ambient water and atmospheric oxygen, and hypothesized that photoexcited water produces hydroxyl radicals, while atmospheric oxygen produces peroxyl radicals for nucleophilic substitution reactions.…”

Section: Organophosphorus Compoundsmentioning

confidence: 99%

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

et al. 2021

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Characterizing chemical transformation of organophosphorus compounds by 13C and 2H stable isotope analysis

Cited by 43 publications

References 42 publications

Agriculture Development, Pesticide Application and Its Impact on the Environment

Agriculture Development, Pesticide Application and Its Impact on the Environment

Pesticide degradation and export losses at the catchment scale: Insights from compound-specific isotope analysis (CSIA)

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

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