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At-source Control of Acid Mine Drainage.
Lisboa 90: Int'l Symp Acid Mine Water in Pyritic Environ Portugal 9/16-19/90 PP 85-96 :85-96
At present, there is no general solution to the problem of acid drainage from mined lands. There are, however, many options to diminish acid discharges, especially where the oxidizing pyrite is located at or near the land surface. These techniques include barrier methods that isolate the pyrite from oxygen or water, chemical additives, and inhibition of iron-oxidizing bacteria. This paper emphasizes technology developed during the last decade that includes the addition of high volumes of alkalinity and/or phosphate, the use of surface geophysics to identify problem source areas, the sealing of fractured streambeds using polyurethane grout, and the use of anionic surfactants to inhibit the activity of iron- oxidizing bacteria.
Lisboa 90: Int'l Symp. Acid Mine Water in Pyritic Environ. Portugal, 9/16-19/90, PP. 85-96
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division