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 Modified |
Checkout 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) |