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Treatment of Mine Drainage from Abandoned Mines by Biological Iron Oxidation and Lime-stone Neutralization.
Harris-RL; Tiernan-TO; Hinders-J; Et Al
For Reference Only At Bureau Libraries :113 pages
To treat or mediate small flows from acid mine drainage (AMD) sources, a low-cost and low-maintenance treatment method was developed and field tested at an AMD site in Ohio. Phase I studies commenced in June 1982 using a portable bog with five chambers of sphagnum moss (41.3 Ft3) to one of limestone (8.3 Ft3). AMD flow rates ranged from 2 to 18 gal.H-1(0.12 to 1.1 L.Min-1). Phase II studies began in July 1983 during which the chamber ratio of 5:1 for sphagnum to limestone was altered to 4:2. AMD flows averaged 22 gal.H-1 (1.4 L.Min-1). During Phase II, the first chamber length of 12 linear ft (8.3 Ft3) of sphagnum moss was found to reduce on average 88% of the ferrous iron at a rate of 5.5 Mg.L-1.H-1 (1.8 Mg.L-1.Ft-3 of moss). Four chamber lengths or 48 linear ft (33.0 Ft3) of moss reduced on average 50% to 60% of the total iron concentrations in the AMD water at a rate of 1.8 Mg.L-1.H-1 (0.6 Mg.L-1.Ft-3 of moss). Once the AMD flow was stabilized, the portable bog was found to be effective in treating the low-flow AMD by increasing ph and reducing the acidity, ferrous iron, and total iron concentrations. Research done under Contract J0113033 by Peer Consultants, Inc.
CP; Final Contract Report;
For Reference Only At Bureau Libraries
Peer Consultants, Inc.
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division