| Autor: |
M.I.C. MARINHO, W.M. SOUZA, M.F. CABRAL, M.D. CASTRO NETO, M.E.L.R. QUEIROZ, A.A. SILVA |
| Jazyk: |
English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Planta Daninha, Vol 36 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
0100-8358 |
| DOI: |
10.1590/s0100-83582018360100140 |
| Popis: |
ABSTRACT: The characterization of sorption-desorption for imazethapyr and imazapic in six agricultural soils was performed to assess the availability of these herbicides in pollution processes. In this pursuit, the batch equilibrium method and high-performance liquid chromatography were used. The magnitude of Kf values ranging from 0.38 to 2.52 mg1-n kg-1 Ln for imazethapyr and 0.43 to 2.72 mg1-n kg-1 Ln for imazapic indicate weak sorption in the evaluated soils. Soil pH (5.1 to 6.1) and iron oxalate affect sorption-desorption of both herbicides but the type and percentage of clay can be the main factor affecting these two processes. A high desorption percentage (>70%) was found in Regosol, Dystric Plinthosol, Ferralsol (for both herbicides), and Dystric Gleysol (only imazapic) soils, which implies in leaching risks of these imidazolinone herbicides into groundwater. Lower desorption ( |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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