Full-scale Field Trials of a Bactericidal Treatment to Control Acid Mine Drainage.
Pres Annu Mtg Geol Soc Am New Orleans Louisiana Oct 1982 1982 Oct; 14(7):531-532
Sodium lauryl sulfate (sls) is one of several anionic detergents known to be effective in inhibiting the iron-oxidizing bacterium, thiobacillus ferrooxidans. Since t. Ferrooxidans plays a critical role in determining the rate of pyrite oxidation, the Bureau of Mines investigated the use of sls as a method to control the formation of acid mine drainage. In previously reported pilot-scale tests, the detergent successfully controlled t. Ferrooxidans and thereby reduced acid production 60 to 90 pct. During 1982, the Bureau conducted five full-scale field trials at active and abandoned surface mines and coal refuse piles. The first of these tests was at a 10-acre inactive refuse pile near Beckley, West Virginia. After a 3-month lag period, average acidity decreased from 900 mg/l to 350 mg/l and iron decreased from over 100 mg/l to 2 mg/l. An 8-acre active section of a large refuse pile was treated similarly; acidity and sulfate decreased from over 4,000 mg/l to less than 100 mg/l and iron decreased from 1,000 mg/l to 2 mg/l or less. At both sites, a single application was effective for about 4 months. Other field tests have been conducted at active and abandoned surface mines in Ohio and West Virginia.
Pres. Annu. Mtg., Geol. Soc. Am., New Orleans, Louisiana, Oct. 1982, V. 14, No. 7, PP. 531-532