WATER QUALITY AND METAL TRANSPORT IN WATER-COVERED MINE TAILINGS DEPOSITS AT SULPHIDE ORE MINES - IN SITU MEASUREMENTS AND MODELLING BY DGT SAMPLERS

摘要

This poster to Mine Water 2009, presents results from studies of metals in the surface layers of a mine tailing sediment from a water covered pyrite mine tailing dam in Norway. We used the Diffusive Gradients in Thin films (DGT) probe in parallell with Diffusive Equilbrium in Thin Films (DET) probe and a modified peeper to collect metals in porewater. Metals were determined with Inductively Coupled Plasma Mass Spectrometry (ICPMS). The aim was to get high resolution (5-10mm) profile of pore water metal concentrations of the top sediment, to assess potential for leakage of metals over the sediment surface, and to describe processes in the top sediments regulating the release of metals. Results from this study are presented, and show that DGT/DET technology is a new and useful tool in such studies.