Behavior of Atrazine and Its Degradation Products Deethylatrazine and Deisopropylatrazine in Oxisol Samples

Amadori, Maristela Fiorese; Barreto-Rodrigues, Márcio; Rebouças, Caio C.; Peralta‐Zamora, Patricio; Grassi, Marco Tadeu; Abate, Gilberto

doi:10.1007/s11270-016-3078-6

Cited by 10 publications

(8 citation statements)

References 27 publications

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“…In the same study, a different pattern with a clayey Xanthic Haplustox from northeastern Brazil was observed, where, in addition to a lag phase of about 7 days, approximately 74 % of the initially applied 14 C-ATZ was mineralized by the end of the incubation period. Results from this study, together with data from other authors indicated that, in addition to the history of herbicide application (Bonfleur et al, 2010), physical and chemical properties of the soil (Dick et al, 2010), local environmental conditions, such as rainfall (Correia et al, 2007), topography (Aquino et al, 2013) and agricultural practices, such as straw cover (Amadori et al, 2016) and the addition of organic residues (Silva et al, 2016) may also affect the extent of ATZ dissipation.…”

Section: Accelerated Solvent Extractionsupporting

confidence: 58%

“…v.76, n.1, p.63-71, January/February 2019 respectively. Regarding ATZ retention in straw and its formation of metabolites, a previous experiment performed in a maize field in Brazil (Paraná State) reported ATZ concentrations two-fold higher in comparison to DEA and DIA even after 180 days of ATZ application (Amadori et al, 2016). Degradation of ATZ into its metabolites observed in the straw from Microcosms 3 and 5 may also have been caused by fungi, since the presence of fungal colonies in both microcosms were visible to the naked eye.…”

Section: Extractable Atz and Its Metabolitesmentioning

confidence: 82%

“…Previous laboratory and field studies on Brazilian soils evaluated the patterns of ATZ dissipation (Aquino et al, 2013;Correia et al, 2007) while others considered the role of straw (covering or mixed into the soil (Amadori et al, 2016;Araldi et al, 2015;Silva et al, 2016) or the extent of enhanced ATZ degradation (Bonfleur et al, 2010;Martinazzo et al, 2010). Nevertheless, a simultaneous study of ATZ degradation patterns with radiolabeled herbicide, focusing on the role of the straw cover simulating a no-tillage system has not so far been reported for Brazilian agricultural soils.…”

Section: Introductionmentioning

confidence: 99%

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Atrazine degradation patterns: the role of straw cover and herbicide application history

Leal

Dick

Stahl

et al. 2019

Sci. agric. (Piracicaba, Braz.)

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In Brazil, atrazine (ATZ) is widely applied to maize (Zea mays L.) fields for weed control. The presence of ATZ and its metabolites in soil and water matrices has become a matter of some concern for governmental authorities as well as for society at large. This study evaluated the patterns of ATZ degradation (mineralization, extractable and non-extractable ATZ residues, and metabolite formation) in a Brazilian Typic Paleudult. Soil samples from a cultivated area under a no-tillage system with a history of ATZ application were incubated with 14 C-ATZ in both the presence and absence of straw cover on the soil surface, and the evolved 14 CO 2 was determined by liquid scintillation. Samples from an area with native vegetation, adjacent to the cultivated area, were also incubated as a control. A higher mineralization of ATZ was observed in the cultivated soil (> 85 %) in comparison with the native soil (10 %) after 85 days of incubation. In addition to the higher mineralization and hydroxyatrazine (HA) formation, a rapid decrease in the water-extractable residues was observed in the cultivated soil. When the cultivated soil was covered with straw, mineralization was reduced by up to 30 % although a small amount of remobilization to the soil occurred within the 85 days. Straw cover hindered the degradation of ATZ in cultivated soils; whereas an accelerated biodegradation was due to repeated applications of ATZ, which may have selected microbiota more skilled at biodegrading the herbicide.

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Section: Accelerated Solvent Extractionsupporting

confidence: 58%

Section: Extractable Atz and Its Metabolitesmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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Atrazine degradation patterns: the role of straw cover and herbicide application history

Leal

Dick

Stahl

et al. 2019

Sci. agric. (Piracicaba, Braz.)

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“…The higher concentration of the 3 herbicides obtained in the deeper horizons would suggest that microbial decomposition was partially responsible for the results. This interpretation is supported by the presence of larger microbial populations in the surface horizons (Figure 1) because of the presence of greater carbon, phosphorus, and nitrogen resources [29,58].…”

mentioning

confidence: 86%

Persistence of acetochlor, atrazine, and S‐metolachlor in surface and subsurface horizons of 2 typic argiudolls under no‐tillage

Bedmar

Giménez

Costa

et al. 2017

Enviro Toxic and Chemistry

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Variations in soil properties with depth strongly influence the degradation and persistence of herbicides, underlining the importance of studying these processes in soil horizons with distinctively different properties. The persistence of the herbicides acetochlor, atrazine, and S-metolachlor was measured in samples of the A, B, and C horizons of 2 Typic Argiudolls from Argentina under no-till management. The soils studied differed in soil organic carbon (OC) content, pH, particle size distribution, and structure. Quantification of herbicides in soil was done through high-performance liquid chromatography with diode array detector. There were interactions of herbicide × horizon (p < 0.01) that resulted in degradation rates (k) of all herbicides decreasing, and their corresponding dissipation half-life (DT50) values increasing, with soil depth. Herbicide persistence across all soils and horizons ranged from 15 to 73 d for acetochlor, 13 to 29 d for atrazine, and 82 to 141 d for S-metolachlor, which had significantly (p < 0.01) greater persistence than atrazine and acetochlor. The DT50 values of herbicides were negatively correlated with the contents of OC (correlation coefficients ranging from -0.496 to -0.773), phosphorus (-0.427 to -0.564), and nitrogen-nitrate (-0.507 to -0.662), and with microbial activity (-0.454 to -0.687) and the adsorption coefficient (-0.530 to -0.595); DT50s were positively correlated with pH (0.366 to 0.648). Adsorption was likely the most influential process in determining persistence of these herbicides in surface and subsurface horizons. The present study can potentially improve the prediction of the fate of acetochlor, atrazine, and S-metolachlor in soils because it includes much needed information on the degradation of the herbicides in subsurface horizons. Environ Toxicol Chem 2017;36:3065-3073. © 2017 SETAC.

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“…In addition, it is considered a moderately persistent chemical in the environment as it has a long half-life, and greater mobility in soils than some other herbicides such as dipropetryne and simetryn [7]. Atrazine, due to its high toxicity, persistence, and mobility in the environment [8,9], was banned by the European Union in 2003, but it is still one of the most widely used herbicides against broad leaf weeds today in many countries, for example, the USA, Brazil, and Argentina [10]. Therefore, for a safe environment, the rapid elimination of atrazine from the site of contamination is considered to be of vital importance.…”

Section: Introductionmentioning

confidence: 99%

Study on the Isolation of Two Atrazine-Degrading Bacteria and the Development of a Microbial Agent

Zhu

Jin³

et al. 2019

Microorganisms

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Two bacteria capable of efficiently degrading atrazine were isolated from soil, and named ATLJ-5 and ATLJ-11. ATLJ-5 and ATLJ-11 were identified as Bacillus licheniformis and Bacillus megaterium, respectively. The degradation efficiency of atrazine (50 mg/L) by strain ATLJ-5 can reach about 98.6% after 7 days, and strain ATLJ-11 can reach 99.6% under the same conditions. The degradation of atrazine is faster when two strains are used in combination. Adding the proper amount of fresh soil during the degradation of atrazine by these two strains can also increase the degradation efficiency. The strains ATLJ-5 and ATLJ-11 have high tolerance to atrazine, and can tolerate at least 1000 mg/L of atrazine. In addition, the strains ATLJ-5 and ATLJ-11 have been successfully made into a microbial agent that can be used to treat atrazine residues in soil. The degradation efficiency of atrazine (50 mg/kg) could reach 99.0% by this microbial agent after 7 days. These results suggest that the strains ATLJ-5 and ATLJ-11 can be used for the treatment of atrazine pollution.

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Behavior of Atrazine and Its Degradation Products Deethylatrazine and Deisopropylatrazine in Oxisol Samples

Cited by 10 publications

References 27 publications

Atrazine degradation patterns: the role of straw cover and herbicide application history

Atrazine degradation patterns: the role of straw cover and herbicide application history

Persistence of acetochlor, atrazine, and S‐metolachlor in surface and subsurface horizons of 2 typic argiudolls under no‐tillage

Study on the Isolation of Two Atrazine-Degrading Bacteria and the Development of a Microbial Agent

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