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Article Dans Une Revue Agronomy for Sustainable Development Année : 2005

Bentazone adsorption and desorption on agricultural soils

Arnaud Boivin
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Richard Cherrier
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Michel Schiavon
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Résumé

Herbicide fate and transport in soils greatly depend upon adsorption-desorption processes. Batch adsorption and desorption experiments were performed with the herbicide bentazone using 13 contrasted agricultural soil samples. Bentazone was found to be weakly sorbed by the different soils, showing average Freundlich adsorption coefficients (Kf) value of 1.4 ± 2.3 mg1 - nf Lnf kg-1. Soil organic matter content did not have a significant effect on bentazone sorption (r2 = 0.12), whereas natural soil pH appeared to be a key factor (r2 = 0.68). A large part (average of 96.9 ± 4.1%) of the sorbed bentazone was released into aqueous solution after successive desorption steps, although some hysteresis was observed for each soil. Whereas soil pH was found to also influence bentazone desorption, other soil properties did not show well-defined relationships with sorption.
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hal-00886288 , version 1 (11-05-2020)

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  • HAL Id : hal-00886288 , version 1

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Arnaud Boivin, Richard Cherrier, Michel Schiavon. Bentazone adsorption and desorption on agricultural soils. Agronomy for Sustainable Development, 2005, 25 (2), pp.309-315. ⟨hal-00886288⟩
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