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Investigation of the Mechanics of Mine Acid Formation in Underground Coal Mine Drainage.

Walsh FM
NTIS: PB/83-233387 :69 pages
The objective of this program was to determine by laboratory experiments the kinetics and mechanics of the reactions that produce acid in coal mine drainage. The program was divided into three phases: in Phase I, five coal mines, representative of Appalachian coal mines, were chosen for sampling and an experimental design was identified suited to accomplish the program objectives. In phase II, the five mines were sampled and test protocols applied. The results showed most pyrite weathering to be based on oxidation in the presence of water. Iron bacteria, especially thiobacillus ferrooxidans, catalyzed the rate of pyrite weathering by a factor of three. An increase in initial iron concentration in a system that modeled the mine environment acted to inhibit bacterial catalysis of weathering. In Phase III, five tailings piles were sampled and the material obtained was used to evaluate this method of bacterial catalysis inhibition. The evaluation verified method effectiveness; inhibition over 80% of the release of weathering was observed.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
OFR 128-83
NIOSH Division
Source Name
NTIS: PB/83-233387
Performing Organization
Eco, Div. of Kor Inc.
Page last reviewed: November 12, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division