Titolo: Metal contamination from abandoned mining sites: experimental investigation on possible remediation techniques
Data di pubblicazione: 2004
Abstract: A case of abandoned mine site remediation, with particular emphasis on stream sediment contaminated by heavy metals, is considered. Solid samples were collected in the mining area of Monte Narba, SE Sardinia (Italy). Mineralogical, chemical and physical characterisation has been carried out. Ex situ metal leaching with acidic solutions has been tested as a potential remediation technique, by varying temperature, mixing velocity, leachant concentration, and solid/liquid weight ratio. The results of the experimental section show that the extractive process is strongly influenced by chloride anion concentration in solution, temperature and solid/liquid ratio. Combining these three factors, it is possible to reach a high extractive efficiency for lead removal. Finally, although the scaling up of the process requires more detailed information, a possible plant flow-sheet for the application of the investigated technique to full scale is proposed.
Tipologia:1.1 Articolo in rivista

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