FIGURE 8.8 Results of the study considering bio-weathering scenario.
8.4 Metal leaching and recovery
Slags are valuable carriers of metals whose extraction appears to be reasonable treatment way
in order gain metals that would otherwise be lost in these wastes. This method relies on
treating the waste with an extracting solution. The latter may be a traditional chemical agent
(chemical leaching) or solution containing microorganisms assisting as the extracting agents
(bioleaching). The choice of method and conditions depends on slag properties, mainly metal
leachability govern by solid phase being its carrier.
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