title: Propanil in a Manitoba soil: an interactive spreadsheet model based on conventional chemical kinetics.
abstract: An interactive spreadsheet model has been created for quantitative predictions of propanil sorption and reaction in a slurried Manitoba clay soil. Based on experimental values for the numbers of empty and filled sorption sites as reactants and products, the reaction mechanism has been described with conventional chemical kinetics. The on line HPLC μ extraction method revealed labile sorption, intraparticle diffusion, and a chemical reaction. Laidler's integral rate law for second order kinetics describes the labile sorption. Desorption, intraparticle diffusion, and the chemical reaction are all described by first order kinetics. The time dependent effects of initial concentration and amount of slurried soil can be predicted for sorption, intraparticle diffusion, and the amount of reaction product. Suggested applications include storm runoff and inputs for fate and transport hydrology models.
authors.affiliation: Department of Chemistry, Saint Mary's University, Halifax, Nova Scotia B3H. 3C3, Canada. dgamble@ns.sympatico.ca
authors.forename: Donald S
authors.initials: DS
authors.lastname: Gamble
authors.forename: G R Barrie
authors.initials: GR
authors.lastname: Webster
authors.forename: Marc
authors.initials: M
authors.lastname: Lamoureux
mesh_terms: D006540:Herbicides / Q000032:analysis / Q000737:chemistry; D007700:Kinetics; D008350:Manitoba; D008956:Models, Chemical; D011411:Propanil / Q000032:analysis* / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry
chemical_list: D006540:Herbicides; D012989:Soil Pollutants; D011411:Propanil