Main Title |
Determination of Mine Waste Acidity. |
Author |
Salott, B. V. ;
Bart, E. F. ;
Ettinge, M. B. ;
Tollive, W. E. ;
|
CORP Author |
Federal Water Pollution Control Administration, Cincinnati, Ohio. |
Year Published |
1967 |
Stock Number |
PB-217 486 |
Additional Subjects |
( Mine waters ;
Acidity) ;
( Water pollution ;
Mine waters) ;
Water analysis ;
Hydrogen peroxide ;
Oxidation ;
Iron ;
Mine acid drainage
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-217 486 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
27p |
Abstract |
Pollution from acid mine drainage is a chronic problem. The current vigorous interest has led to a re-examination of the methods of measuring total acidity, which are clearly based on the limited laboratory capabilities of prior years. Defined acid-metal mixtures containing iron(III), aluminum(III), iron(II), and hydrogen ion were reacted with sodium hydroxide under varying titration conditions. Results showed that at 25C a reliable measure of the total acidity can be obtained by oxidizing iron(II) with hydrogen peroxide and stopping the titration at pH 7.3. Hydroloysis of Fe(III) and Al(III) was complete at pH 7.3 before formation of aluminate ion. Positive interference due to manganese and hardness can be held to a minimum by proper selection of sample volume. Acidity due to carbon dioxide is easily removed by aeration. The procedure was applied to the analysis of acid mine sample with added standards with recoveries of 98 to 103%. (Author) |
PUB Date Free Form |
Jan 67, |
Category Codes |
13B; 68D |
NTIS Prices |
PC A03/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326553545 |
Origin |
NTIS |
Type |
CAT |