Consulta: creatorFacets:"JUNQUEIRA,L.V."
Registros recuperados: 2
Data/hora: 09/06/2024 12:44:47

Diuron Sorption, Desorption and Degradation in Anthropogenic Soils Compared to Sandy Soil
Provedor de dados: 87
Autores: ALMEIDA,C.S.; MENDES,K.F.; JUNQUEIRA,L.V.; ALONSO,F.G.; CHITOLINA,G.M.; TORNISIELO,V.L.
ABSTRACT: The aim of this study was to evaluate diuron sorption, desorption and degradation in two anthropogenic soils (Terra Preta de Índio - TPI) in contrast to a sandy soil (Quartzarenic Neosol - NQo). Sorption-desorption studies were performed by the batch equilibrium method and biodegradation in biometric bottles using radiolabeled diuron in 14C. Freundlich coefficient (Kf) values ranged from 13.50 to 50.41 µmol(1-1/n) L1/n kg-1 in TPI-2 and TPI-1, respectively, indicating very high diuron sorption in anthropogenic soils, following the order: TPI-1 ≥ TPI-2 &gt; NQo (99.10, 98.95 and 60.8%, respectively). Diuron desorption was very low in anthropogenic soils, ranging from 1.36 (TPI-1) to 1.70% (TPI-2), and 24% to NQo. Accumulated diuron mineralization...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bound residue; Mineralization; Sorption isotherms; Amazonian soils.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100233

Influence of Soil Depth on Sorption and Desorption Processes of Hexazinone
Provedor de dados: 87
Autores: CHITOLINA,G.M.; MENDES,K.F.; ALMEIDA,C.S.; ALONSO,F.G.; JUNQUEIRA,L.V.; TORNISIELO,V.L.
ABSTRACT: 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...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Retention isotherms; Mobile herbicide bioavailability.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100216