title: Using a two site-reactive model for simulating one century changes of Zn and Pb concentration profiles in soils affected by metallurgical fallout.
abstract: Predicting the transfer of contaminants in soils is often hampered by lacking validation of mathematical models. Here, we applied Hydrus-2D software to three agricultural soils for simulating the 1900-2005 changes of zinc and lead concentration profiles derived from industrial atmospheric deposition, to validate the tested models with plausible assumptions on past metal inputs to reach the 2005 situation. The models were set with data from previous studies on the geochemical background, estimated temporal metal deposition, and the 2005 metal distributions. Different hypotheses of chemical reactions of metals with the soil solution were examined: 100% equilibrium or partial equilibrium, parameterized following kinetic chemical extractions. Finally, a two-site model with kinetic constant values adjusted at 1% of EDTA extraction parameters satisfactory predicted changes in metal concentration profiles for two arable soils. For a grassland soil however, this model showed limited applicability by ignoring the role of earthworm activity in metal incorporation.
authors.affiliation: Departamento de Solos, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
authors.forename: Fábio Joel Kochem
authors.initials: FJ
authors.lastname: Mallmann
authors.forename: Danilo Rheinheimer
authors.initials: DR
authors.lastname: dos Santos
authors.forename: Philippe
authors.initials: P
authors.lastname: Cambier
authors.forename: Jérôme
authors.initials: J
authors.lastname: Labanowski
authors.forename: Isabelle
authors.initials: I
authors.lastname: Lamy
authors.forename: Maria Alice
authors.initials: MA
authors.lastname: Santanna
authors.forename: Daniel
authors.initials: D
authors.lastname: Tessier
authors.forename: Folkert
authors.initials: F
authors.lastname: van Oort
mesh_terms: D000383:Agriculture; D004784:Environmental Monitoring; D049673:History, 20th Century; D049674:History, 21st Century; D007700:Kinetics; D007854:Lead / Q000737:chemistry* / Q000266:history; D008669:Metallurgy; D008962:Models, Theoretical; D012989:Soil Pollutants / Q000737:chemistry* / Q000266:history; D015032:Zinc / Q000737:chemistry* / Q000266:history
chemical_list: D012989:Soil Pollutants; D007854:Lead; D015032:Zinc