Record Display for the EPA National Library Catalog

RECORD NUMBER: 44 OF 65

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
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB-213 121 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 65p
Abstract
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)