Record Display for the EPA National Library Catalog


Main Title Purification of Mine Water by Freezing.
CORP Author Applied Science Labs., Inc., State College, Pa.
Year Published 1971
Report Number EPA-14010-DRZ; 01817,; 14010-DRZ-02/71
Stock Number PB-213 121
Additional Subjects ( Mine waters ; Freezing) ; ( Water pollution ; Mine waters) ; Metals ; Acids ; Iron inorganic compounds ; pH ; Coal mines ; Calcium oxides ; Sulfates ; Purification ; Water pollution control ; Mine acid drainage
Library Call Number Additional Info Location Last
NTIS  PB-213 121 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 65p
Partial freezing of acid mine water was used to the extent of 50% conversion to ice. Various metal and acid components in the product water were consistently reduced 85 to 90%. Acid mine water that had been treated with lime was used in similar freezing experiments and observed to have a reduction of metal ions. The pH remained substantially unchanged and the hardness of the water was reduced by nearly 100%. Considerable variations resulted even with efforts toward good control and reproducibility of operation. A firm conclusion as to reduction of sulfate and reduction of certain individual metals was prevented because of difficulties with analytical results. (Author)