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 (K-f) value of 1.4 +/- 2.3 mg(1-nf) kg(-1). Soil organic matter content did not have a significant effect on bentazone sorption (r(2) = 0.12), whereas natural soil pH appeared to be a key factor (r(2) = 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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DiazinonBentazone is used as herbicide in wheat field
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 (K-f) value of 1.4 +/- 2.3...