Parameterization and evaluation of sulfate adsorption in a dynamic soil chemistry model.

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Sulfate adsorption was implemented in the dynamic, multi-layer soil chemistry model SAFE. The process is modeled by an isotherm in which sulfate adsorption is considered to be fully reversible and dependent on sulfate concentration as well as pH in soil solution. The isotherm was parameterized by a site-specific series of simple batch experiments at different pH (3.8–5.0) and sulfate concentration (10–260 mol l−1) levels. Application of the model to the Lake Gårdsjön roof covered site shows that including sulfate adsorption improves the dynamic behavior of the model and sulfate adsorption and desorption delay acidification and recovery of the soil. The modeled adsorbed pool of sulfate at the site reached a maximum level of 700 mmol/m2 in the late 1980s, well in line with experimental data.
Original languageEnglish
Pages (from-to)119-125
JournalEnvironmental Pollution
Issue number1
Publication statusPublished - 2003

Subject classification (UKÄ)

  • Chemical Engineering


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