ALISON TURNER, CHARLOTTE BRAUNGARDT
Column experiments, based on the European standard up-flow percolation test (TS 14405), were applied to waste rock from an abandoned Pb/Zn mine in southwest England. The aim was to investigate the range and magnitude of pollutants transported from mine waste tips to surface watercourses. The dynamic leaching test was chosen to mimic the transport of rainwater through mine spoil, thereby providing a laboratory proxy for field conditions. A range of metals (Cd, Cu, Mn, Pb, Zn) and major ions were determined in the column leachate, covering solid:liquid ratios of 0-10 L kg-1. The highest concentrations of Zn (200 μmol L-1), Cu (17.4 μmol L-1) and Cd (0.70 μmol L-1) in the leachate were observed at low L/S ratios. Leachate concentrations decreased exponentially for most elements, except Pb, which maintained high concentrations (up to 80 μmol L-1) throughout the experiment. Batch extractions with L/S ratios of 2, 5 and 10 L kg-1 were applied to the same material. Concentrations in the supernatant were generally comparable to results from column experiments, but differences at high L/S were attributed to the dynamic mode of leaching. This discrepancy highlights the limitations of using laboratory experiments to predict pollutant sources at abandoned mine sites.
@article{e2a5ccf0-de82-4f91-976b-fbfa282bb72a,
title={DYNAMIC UP-FLOW PERCOLATION TESTS - A MODEL FOR MINING WASTE LEACHATE GENERATION},
author={ALISON TURNER and CHARLOTTE BRAUNGARDT},
year={2009},
language={en}
}TY - JOUR TI - DYNAMIC UP-FLOW PERCOLATION TESTS - A MODEL FOR MINING WASTE LEACHATE GENERATION AU - ALISON TURNER AU - CHARLOTTE BRAUNGARDT PY - 2009 LA - en ER -
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