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Tritiated Water as a Tracer in the Dump Leaching of Copper.

Authors
Armstrong-FE; Evans-GC; Fletcher-GE
Source
NTIS: PB 200 048 :39 pages
Link
NIOSHTIC No.
10008749
Abstract
Tritiated water has been used as a tracer to follow the path of leach liquids as they flow through a coppermine dump. Semipermeable layers, produced within the dump by compaction and "stratification" of deposited dump material, restrict the vertical movement of water. Knowledge of this restriction would aid in the optimization of the leaching process. The portion of the dump of particular interest was approximately 2,000 feet long, 800 feet wide, and 200 feet high. A total of 94 curies of tritiated water was injected into the dump at the rate of 650 gpm over a period of 39 hours. The leach liquid was sampled at natural surface outflows and through a series of wells, some drilled to the bottom of the dump and others to intermediate levels. More than 3,300 samples were analyzed, most by liquid scintillation counting, but a few hundred by gas counting. Data obtained permitted calculation of flow paths, recycle times, total fluid volume, and estimates of retention times in various portions of the dump.
Publication Date
19710101
Document Type
IH; Report of Investigation;
Fiscal Year
1971
NTIS Accession No.
PB-200048
NTIS Price
A04
Identifying No.
RI 7510
NIOSH Division
BERC;
Source Name
NTIS: PB 200 048
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