Cation competition in a natural subsurface material: Prediction of transport behavior

Article Article scientifique Article Cation competition in a natural subsurface material: Prediction of transport behavior eng 2002 author Vulava V. M. author Kretzschmar Roland-Philippe 541557 author Barmettler K. author Voegelin Andréa 705362 author Grolimund - Berset Denise 775658 author Borkovec Michal 134121 1-7 10.1029/2001WR000262 0043-1397 http://doi.wiley.com/10.1029/2001WR000262 Predicting the transport of reactive chemicals in subsurface porous media requires accurate adsorption models. This study compares the ability of various cation exchange models to quantitatively capture the transport behavior of major cations (i.e., calcium and sodium) in soil laboratory columns over a wide range of pore water composition. Experimental breakthrough curves were compared with model predictions without adjustable parameters. Various one‐site and multisite cation exchange models were independently calibrated with batch adsorption data. Our results show that a one‐site cation exchange model based on the well‐known Gaines‐Thomas convention yields good predictions of cation transport behavior, although some deviations from experimental data remain. The most reliable predictions were obtained with multisite cation exchange models with a distribution of various types of exchange sites. Multicomponent chromatography Affinity spectra Reactive transport Exchange conventions Exchange equilibrium Dewey 540 40 Département de chimie minérale, analytique et appliquée 145 false Water Resources Research 38 5 96a71a0e-746a-4c71-8d51-205a5d2115a2 Article (Published version) Public Cation_MB_2002.pdf 308604 application/pdf openAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée

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Cation competition in a natural subsurface material: Prediction of transport behavior	Water Resources Research			2002	339	230

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Kretzschmar, Roland-Philippe