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Laboratory Study of Submerged Metal-mine Tailings 1: Effect of Solid-liquid Contact Time and Aeration on Contaminant Concentrations.

Authors
Doepker-RD; Drake-PL
Source
Trans SME 1991 288:1824-1830
Link
NIOSHTIC No.
10011741
Abstract
The dissolution of metals from various metal-mine tailings has been studied through a series of submerged tailings batch tests at U.S. Bureau of Mines laboratories. Tailings selected for this study included both reactive (as determined by column leaching studies) and benign tailings. Metal mobilization in aerated (97 pct saturated with oxygen) samples appeared to be consistently greater than metal dissolution from stagnant (79 or 70 pct saturated with oxygen) waters. In the early weeks of the study, sulfate concentrations increased with solid-liquid contact time, while calcium dissolution remained nearly constant. Metal concentrations varied in relation to solid-liquid contact time and aeration. Leachate ph appeared to be nearly independent of solid-liquid contact time for basic tailings. Reactive tailings having both a submerged and a surface component demonstrated increased metal mobility.
Publication Date
19910101
Document Type
OP;
Fiscal Year
1991
NTIS Accession No.
NTIS Price
Identifying No.
OP 107-91
NIOSH Division
SRC;
Source Name
Trans. SME, V. 288, 1991, PP. 1824-1830
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