The simultaneous modelling of metal ion and humic substance transport in column experiments |
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Authors: | Bryan Nick D Barlow Jenny Warwick Peter Stephens Sarah Higgo Jenny J W Griffin David |
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Institution: | Centre for Radiochemistry Research, Department of Chemistry, University of Manchester, Oxford Road, Manchester, UK M13 9PL. |
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Abstract: | Pulsed column experiments using Co, fulvic acid and porous sediment packing, along with up/down-flooding experiments using Eu, humic acid and intact sandstone blocks have been performed. The elution of metal and humic and their distribution along the sandstone columns have been measured. A mixed equilibrium and kinetic coupled chemical transport model has been used to simulate the results. In both cases, one exchangeable and one non-exchangeable component have been used to simulate the interaction of metal and humic substance. For the pulsed experiments, a simple equilibrium approach was used to model humic sorption, while a two component, kinetic model was required for the sandstone columns. |
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