title: Is organic matter alone sufficient to predict isoproturon sorption in calcareous soils?
abstract: Eleven soils collected from Champagne-Ardenne area (France) were used to investigate isoproturon sorption in laboratory conditions. Our results identified the organic matter (OM) and the ratio of calcite content to OM content (Rt) as the main two parameters governing isoproturon retention in soils. While organic matter favored pesticide sorption, calcite had an antagonistic effect since it limited isoproturon retention. The Rt ratio of calcite content to organic matter content in soils appeared to be a parameter that should be considered in predictive models in addition to OM in regions presenting calcareous soils. Adsorption of isoproturon as a function of Rt and OM was successfully described through a simple empirical model.
authors: Institut de Chimie Moléculaire de Reims (ICMR, UMR CNRS 6229), Groupe Chimie de Coordination, France.
authors: Achouak
authors: A
authors: El Arfaoui
authors: Stéphanie
authors: S
authors: Sayen
authors: Michaël
authors: M
authors: Paris
authors: Amor
authors: A
authors: Keziou
authors: Michel
authors: M
authors: Couderchet
authors: Emmanuel
authors: E
authors: Guillon