Effect of liming on hexazinone sorption and desorption behavior in various soils

Santos, Luiz Odonil Gomes dos; Souza, Matheus de Freitas; Chagas, Paulo Sérgio Fernandes das; Fernandes, Bruno Caio Chaves; Silva, Tatiane Severo; Dombroski, Jéferson Luiz Dallabona; Souza, Carolina Malala Martins; Silva, Daniel Valadão

doi:10.1080/03650340.2018.1557323

Cited by 14 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result is different compared to the others studied that evaluating the sorption of other herbicides. In these studies, the clay is frequently associated with the higher sorption capacity of soils (DOS SANTOS et al, 2018;MENDES et al, 2017). The fact may be related to the low clay content of the Northeast Brazilian soils (Table 1).…”

Section: Resultsmentioning

confidence: 96%

“…These soils have the highest organic matter content compared to the others studied soils (Table1). Studies have demonstrated that the organic matter is the soil attribute with the highest importance for sorption of organic pollutants (DOS SANTOS et al, 2018;FARIA et al, 2018). For example, in several programs that aim decontaminate soils exposure to herbicides application, the organic compounds, such as biochar, are an efficiency to adsorb the molecules, reducing the amount of herbicide in the soil solution (MENDES et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…Once in the soil, herbicides can undergo different processes. Sorption and desorption are examples and define the amount of a herbicide available in the soil solution (DOS SANTOS et al, 2018). In the soil solution, the herbicides can be absorbed by plants, promoting weed control.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sorption and desorption of ametryn in different types of soils

Cortez¹,

Chagas²,

Silva³

et al. 2019

Biosci. J.

Self Cite

View full text Add to dashboard Cite

Knowledge of factors related to the dynamics of herbicides in the environment is of fundamental importance to predicting the behavior of herbicides in soils with different attributes, to select appropriate dosages, as well as to avoid harmful effects on the environment and subsequent crops. The objective of this work was to evaluate the sorption and desorption of ametryn in seven soils with different attributes. Initially, the equilibrium time was determined by the "Batch Equilibrium". Then, it was performed the sorption test with different concentrations (0.5; 1; 2; 4; 8; 16; 24 and 32 mg L-1) of ametryn in 0.01 mol L-1 CaCl2. 10 mL of these solutions were added to samples of 2.00 g of each soil, remaining under rotary shaking for 4 hours. After centrifugation and filtration, the ametryn concentration in the supernatant was determined by high-performance liquid chromatography. Desorption was evaluated using the tubes containing 16 mg L-1 prior to sorption testing. The results indicated that the sorption and desorption of ametryn depend on the physicochemical attributes of the soil. Sorption was higher in soils with high organic matter content and high ion exchange capacity, while desorption was inversely proportional to sorption.

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Sorption and desorption of ametryn in different types of soils

Cortez¹,

Chagas²,

Silva³

et al. 2019

Biosci. J.

Self Cite

View full text Add to dashboard Cite

show abstract

“…A study conducted by Koskinen et al (1996), using six types of sandy soils with depths varying from 0-5 to 90-95 cm also demonstrated the relationship between OC and the sorption of hexazinone, obtaining low values of K d and K oc , which ranged, respectively, from 1.10 to 0.0119 L kg -1 and from 25.7 to 20.9 L kg -1 at the respective depths of 0-5 and 90-95 cm. Santos et al (2018) also reported low K f values of hexazinone, ranging from 0.06 to 0.73 mg 1-1/n kg -1 L 1/n in Brazilian soils. The values obtained in the q max were <0.28 g kg -1 (0-10 cm soil depth) ( Table 2) and represent the maximum capacity of hexazinone sorption in the different soil profiles.…”

Section: Hexazinone Sorption and Soil Depthmentioning

confidence: 95%

Influence of Soil Depth on Sorption and Desorption Processes of Hexazinone

et al. 2020

View full text Add to dashboard Cite

Herbicides with a high leaching capacity, such as hexazinone, tend to reach deeper soils more easily, where retention of the product affects its availability in the soil solution. Therefore, it is important to understand the behavior of hexazinone at a variety of soil depths. The objective of this research was to evaluate the sorption and desorption of hexazinone throughout the soil profile. The sorption and desorption processes of 14C-hexazinone [triazine-6-14C] at three soil depths (0-10, 10-20, and 20-30 cm) were evaluated by the equilibrium batch method, and the radioactivity of the herbicide was quantified by liquid scintillation spectrometry. Five different concentrations of hexazinone (0.12, 0.19, 0.25, 0.31, and 0.38 µg mL-1) in a methanol solvent were used. The concentrations of the herbicide in equilibrium and sorbed in the soil were adjusted by using isotherms according to the Linear, Freundlich, and Langmuir models. Hexazinone sorption at soil depths of 0-10, 10-20, and 20-30 cm showed decreasing Freundlich coefficients (Kf) with values of 0.18, 0.11, and 0.08 g (1-1/n) L1/n kg-1 (50.49, 47.58, and 46.37% sorbed), and in the desorption the Kf were 7.96, 7.93, and 9.82 g (1-1/n) L1/n kg-1 (26.17, 26.58, and 28.68% desorbed), respectively. The small difference in organic carbon content between soil depths was sufficient to affect hexazinone retention, interfering with the bioavailability of this product in the soil solution for weed control.

show abstract