Abstract:Cooperative adsorption involving anions and cations, termed ion-pair adsorption (IPA), is reported to increase the retention of some ions in certain soils. Sulfate and calcium can exhibit such interaction, and this affects their movement through the soil. Ion-pair adsorption is shown here in miscible displacement experiments with a variable-charge soil. The relevance of IPA under more realistic conditions is further investigated in a pot experiment. Rapeseed (Brassica napus) was grown at two different irrigati… Show more
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