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Treatment of Percolate from Metal Sulfide Mine Tailings with a Permeable Reactive Barrier of Transformed Red Mud

Metal sulfide tailings of the Sardinian (Italy) abandoned Baccu Locci arsenic mine show high concentrations of aluminum, arsenic, cadmium, copper, manganese, lead, and zinc in acid percolate (pH = 4) and have been classified as "dangerous waste." This paper shows that the release of toxic...

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Published in:Water environment research 2010-04, Vol.82 (4), p.319-327
Main Authors: Zijlstra, J.J.P., Dessì, R., Peretti, R., Zucca, A.
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Language:English
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description Metal sulfide tailings of the Sardinian (Italy) abandoned Baccu Locci arsenic mine show high concentrations of aluminum, arsenic, cadmium, copper, manganese, lead, and zinc in acid percolate (pH = 4) and have been classified as "dangerous waste." This paper shows that the release of toxic metals can be strongly reduced when the tailings are placed on a reactive permeable bed (7 wt %) of porous, alkaline pellets of transformed red mud (TRM). During a laboratory percolation test, two columns with 80 kg of waste, of which one contained a bottom layer of TRM pellets, were each alimented with 600 L of de-ionized water. Comparing pH, electroconductivity, metal, and sulfate concentrations of collected percolate from both columns demonstrates efficient neutralization (pH = 7.4) and removal of metals (80 to 99%) for the column with the permeable reactive bottom layer.
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source Wiley:Jisc Collections:Wiley Read and Publish Open Access 2024-2025 (reading list); Access via JSTOR
subjects acid rock drainage
Aluminum
Arsenic
Chelating Agents - chemistry
column leaching
Electrical resistivity
Field study
Industrial Waste
Leaching
Lead
Mine waste
Mining
Mud
permeable reactive barrier
Pollution
Quartz
Sulfates
Sulfides - chemistry
Tailings
transformed red mud pellet
Waste Disposal, Fluid - methods
Zinc
title Treatment of Percolate from Metal Sulfide Mine Tailings with a Permeable Reactive Barrier of Transformed Red Mud
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