Environmental assessment and management of metal-rich wastes generated in acid mine drainage passive remediation systems

► Chemical stability of metal-rich solid wastes from AMD treatments plants is tested. ► TCLP and EN 12457-2 tests show discrepancies when applied to metal-rich wastes. ► Landfill environmental conditions severely control metal release from the residues. ► Metal selective leachability encourages future use of the residue as metal ore.