Treatment of fluvially deposited streamside mine waste - material from Nine Mile Creek, Idaho.
Paulson-AJ; Balderrama-R; Zahl-E; Cox-RL
NIOSH 1995 Jul; :1-68
The size separation of flood plain material contaminated with mine waste was tested to determine if the interaction of water flow with geochemical processes could be changed sufficiently to reduce release rates of metals in a manner that would allow on-site disposal of all material as the sole remediation action. The initial release of metals from the gravel fraction seemed to be controlled by adhered fines, even though the wet-separation process removed more of this finer material. In ancillary separation tests, aggressive water treatment of the coarser fraction was required to limit initial metal release. This treatment involved thoroughly removing the finer fraction. Gravity separation of the finest fraction produced a concentrate high in lead. In contrast, conventional flotation to remove sulfide minerals was ineffective because the material had been weathered and heavily oxidized on the flood plain.
Heavy-metals; Sulfides; Sulfates; Waste-treatment; Chemical-deposition
Report of Investigations
NTIS Accession No.
SRL; SLRC; RERC
National Institute for Occupational Safety and Health