Silver in Welsh soils:Physical and chemical distribution studies
- Jones, K. C.
- Davies, B. E.
- Peterson, P. J.
DOIAbstract
Profile distributions of Ag and other metals (Cd, Cu and Pb) in contaminated and uncontaminated soils from west Wales, U.K. are presented. Background Ag levels were <0.1 μg Ag g-1, whilst profiles contaminated by past mining activities contained up to 9 μg Ag g-1. Silver showed a marked surface enrichment in all cases. Adsorption of AgNO3 by various soil samples was satisfactorily modelled by the Freundlich isotherm equation. Values for k (a constant related to the binding capacity) ranged between 50 and 1450. The Langmuir isotherm equation gave a less satisfactory summary of the adsorption behaviour. Radioactive 110mAg added to intact cores of an alluvial and a peat soil and subjected to leaching over one year (at the annual precipitation ...
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