Glyphosate pollution of surface runoff, stream water, and drinking water resources in Southeast Brazil

Lima, Igor Barbosa; Boëchat, Iola G.; Fernandes, Marco D.; Monteiro, José A. F.; Rivaroli, Luciano; Gücker, Björn

doi:10.1007/s11356-022-24167-2

Cited by 18 publications

(5 citation statements)

References 60 publications

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“…Given the hydrophilicity of glyphosate, water bodies adjacent to a treated field are frequently polluted by glyphosate and AMPA [ 82 , 83 , 84 , 85 , 86 ], with associated possible human diseases [ 87 ]. Pires et al observed that, with a few exceptions, glyphosate concentration in water samples was higher than AMPA, at a ratio that could reach almost 30 for groundwater samples, much higher than in surface samples (highest ratio of 3.6).…”

Section: Occurrence Data Accumulation and Fatementioning

confidence: 99%

Chromatographic Methods for the Determination of Glyphosate in Cereals Together with a Discussion of Its Occurrence, Accumulation, Fate, Degradation, and Regulatory Status

Masci,

Caproni,

Nevigato

2024

MPs

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The European Union’s recent decision to renew the authorization for the use of glyphosate until 15 December 2033 has stimulated scientific discussion all around the world regarding its toxicity or otherwise for humans. Glyphosate is a chemical of which millions of tons have been used in the last 50 years worldwide to dry out weeds in cultivated fields and greenhouses and on roadsides. Concern has been raised in many areas about its possible presence in the food chain and its consequent adverse effects on health. Both aspects that argue in favor of toxicity and those that instead may indicate limited toxicity of glyphosate are discussed here. The widespread debate that has been generated requires further investigations and field measurements to understand glyphosate’s fate once dispersed in the environment and its concentration in the food chain. Hence, there is a need for validated analytical methods that are available to analysts in the field. In the present review, methods for the analytical determination of glyphosate and its main metabolite, AMPA, are discussed, with a specific focus on chromatographic techniques applied to cereal products. The experimental procedures are explained in detail, including the cleanup, derivatization, and instrumental conditions, to give the laboratories involved enough information to proceed with the implementation of this line of analysis. The prevalent chromatographic methods used are LC-MS/MS, GC-MS/SIM, and GC-MS/MS, but sufficient indications are also given to those laboratories that wish to use the better performing high-resolution MS or the simpler HPLC-FLD, HPLC-UV, GC-NPD, and GC-FPD techniques for screening purposes. The concentrations of glyphosate from the literature measured in wheat, corn, barley, rye, oats, soybean, and cereal-based foods are reported, together with its regulatory status in various parts of the world and its accumulation mechanism. As for its accumulation in cereals, the available data show that glyphosate tends to accumulate more in wholemeal flours than in refined ones, that its concentration in the product strictly depends on the treatment period (the closer it is to the time of harvesting, the higher the concentration), and that in cold climates, the herbicide tends to persist in the soil for a long time.

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Section: Occurrence Data Accumulation and Fatementioning

confidence: 99%

Chromatographic Methods for the Determination of Glyphosate in Cereals Together with a Discussion of Its Occurrence, Accumulation, Fate, Degradation, and Regulatory Status

Masci,

Caproni,

Nevigato

2024

MPs

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“…This impact is particularly pronounced among children in their developmental stages, potentially resulting in reduced intelligence [6,7]. Recent studies have detected trace herbicides in drinking wells across multiple countries, including numerous European countries [8][9][10], China [11,12], the United States [13,14], New Zealand [15], Argentina [16], and Brazil [17]. In the United States, at least one pesticide compound was identified in 491 out of 1204 wells [18].…”

Section: Introductionmentioning

confidence: 99%

Effects of Fall and Winter Cover Crops on Weed Suppression in the United States: A Meta-Analysis

Dong,

Zeng

2024

Sustainability

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Cover cropping recently emerged as a promising alternative to conventional tillage and herbicide use for weed suppression in agricultural systems. We investigated their effectiveness in weed control and the varying effects of different management strategies using a meta-analysis. Our analysis studied two categories: weed biomass control and weed density control. We employed a random-effect model to analyze weed biomass to address between-study heterogeneity and found that cover crop treatments led to a significant 62.6% reduction in weed biomass. These results are robust to outliers and publication bias. Furthermore, subgroup analysis found that planting a mixture of cover crop types was more effective than planting a single type. Additionally, planting a mixture of cover crop species, which are subcategories of cover crop types, was found to be more effective than planting a single species. Our analysis also unveiled a persistent, albeit diminishing, reduction in weed biomass even after the termination of cover crops. For weed density analysis, we used a fixed-effect model due to the absence of between-study heterogeneity and found a statistically significant reduction (45.4%) in weed density. Subgroup analysis revealed no significant difference in weed density control between legume and grass cover crop types.

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“…11 Furthermore, it may leach into aqueous environments, including underground water reserves 7,12 and surface waters. 13,14 There is ongoing debate regarding the toxicity of GLY and its metabolite aminomethylphosphonic acid (AMPA). 15−17 While certain studies suggest low human toxicity, 18 others emphatically point to serious risks, 15 including mutagenic, carcinogenic, and genotoxic effects even at low doses, 19 as well as fatal consequences in overdose cases.…”

Section: Introductionmentioning

confidence: 99%

“…Although GLY degrades in a few days in the soil, it can strongly adsorb onto soil minerals, leading to accumulation and persistence with a long half-life . Furthermore, it may leach into aqueous environments, including underground water reserves , and surface waters. , There is ongoing debate regarding the toxicity of GLY and its metabolite aminomethylphosphonic acid (AMPA). − While certain studies suggest low human toxicity, others emphatically point to serious risks, including mutagenic, carcinogenic, and genotoxic effects even at low doses, as well as fatal consequences in overdose cases . The United States Environmental Protection Agency sets the maximum contaminant level in drinking water at 700 mg/L, yet concentrations up to 105 mg/L have been found in freshwater supplies .…”

Section: Introductionmentioning

confidence: 99%

Quantum Simulations and Experimental Insights into Glyphosate Adsorption Using Graphene-Based Nanomaterials

S. Araújo,

Caldeira Rêgo,

Guedes-Sobrinho

et al. 2024

ACS Appl. Mater. Interfaces

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The increasing global demand for food and agrarian development brings to light a dual issue concerning the use of substances that are crucial for increasing productivity yet can be harmful to human health and the environment when misused. Herein, we combine insights from high-level quantum simulations and experimental findings to elucidate the fundamental physicochemical mechanisms behind developing graphene-based nanomaterials for the adsorption of emerging contaminants, with a specific focus on pesticide glyphosate (GLY). We conducted a comprehensive theoretical and experimental investigation of graphene-based supports as promising candidates for detecting, sensing, capturing, and removing GLY applications. By combining ab initio molecular dynamics and density functional theory calculations, we explored several chemical environments encountered by GLY during its interaction with graphene-based substrates, including pristine and punctual defect regions. Our results unveiled distinct interaction behaviors: physisorption in pristine and doped graphene regions, chemisorption leading to molecular dissociation in vacancy-type defect regions, and complex transformations involving the capture of N and O atoms from impurity-adsorbed graphene, resulting in the formation of new GLY-derived compounds. The theoretical findings were substantiated by FTIR and Raman spectroscopy, which proposed a mechanism explaining GLY adsorption in graphene-based nanomaterials. The comprehensive evaluation of adsorption energies and associated properties provides valuable insights into the intricate nature of these interactions, shedding light on potential applications and guiding future experimental investigations of graphene-based nanofilters for water decontamination.

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Glyphosate pollution of surface runoff, stream water, and drinking water resources in Southeast Brazil

Cited by 18 publications

References 60 publications

Chromatographic Methods for the Determination of Glyphosate in Cereals Together with a Discussion of Its Occurrence, Accumulation, Fate, Degradation, and Regulatory Status

Chromatographic Methods for the Determination of Glyphosate in Cereals Together with a Discussion of Its Occurrence, Accumulation, Fate, Degradation, and Regulatory Status

Effects of Fall and Winter Cover Crops on Weed Suppression in the United States: A Meta-Analysis

Quantum Simulations and Experimental Insights into Glyphosate Adsorption Using Graphene-Based Nanomaterials

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