Record Display for the EPA National Library Catalog


Main Title Studies on Limestone Treatment of Acid Mine Drainage.
CORP Author Bituminous Coal Research, Inc., Monroeville, Pa.
Year Published 1970
Report Number FWPCA-DAST-33; FWPCA-14010-EIZ ;FWQA-63-01-68; FWPCA-14010-EIZ; 00620,; 14010-EIZ-01/70
Stock Number PB-195 282
Additional Subjects ( Coal mining ; Mine waters) ; ( Water pollution ; Mine waters) ; ( Mine waters ; Neutralizing) ; Drainage ; Limestone ; Particle size ; pH ; Particle shape ; Calcium ; Magnesium ; Activated carbon ; Zeta potential ; Iron inorganic compounds ; Magnetic separators ; Sludge ; Precipitates ; Coagulation ; Oxidation ; Hydroxides ; Pilot plants ; Mine acid drainage ; Water pollution control ; Iron hydroxides
Library Call Number Additional Info Location Last
NTIS  PB-195 282 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 106p
Four actual coal mine waters have been neutralized with limestone both on a batch scale and by utilizing a continuous flow apparatus. Variations in treatment procedure were necessary depending on the characteristics of the individual waters. A standardized test was established to evaluate the reactivity of the limestones. The following variables are of importance in evaluating limestones for coal mine water neutralization: (a) particle size, (b) Ca and Mg content, and (c) surface area. Ferrous iron oxidation has been accomplished with both synthetic and actual coal mine water at low pH in the presence of coal-derived activated carbon. Electrophoretic mobility studies on precipitates obtained by both lime and limestone neutralization of coal mine water yielded information which can be applied for more effective sludge removal. Magnetic sludges were prepared using two different iron-bearing waters. The conversion of precipitates to a magnetic form results in significant reductions in settled sludge volumes as well as increases in solids content. Data obtained in these studies indicate that the limestone process offers considerable promise for an improved lower cost method for treating several types of coal mine waters. (Author)