| Main Title |
Ammonia Toxicity to Fishes. Effect of pH on the Toxicity of the Un-ionized Ammonia Species. |
| Author |
Thurston, Robert V. ;
Russo, Rosemarie C. ;
Vinogradov, German A. ;
|
| CORP Author |
Montana State Univ., Bozeman. Fisheries Bioassay Lab.;Environmental Research Lab.-Duluth, MN. |
| Year Published |
1981 |
| Report Number |
EPA-600/J-81-550; |
| Stock Number |
PB82-207820 |
| Additional Subjects |
Toxicology ;
Fishes ;
Ammonia ;
pH ;
Water quality ;
Bioassay ;
Reprints ;
Salmo gairdneri ;
Rainbow trout ;
Fathead minnows ;
Pimephales promelas ;
Toxic substances
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB82-207820 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
6p |
| Abstract |
United States and European water quality criteria to protect aquatic life assume that the toxicity of aqueous ammonia is attributable to the un-ionized (NH3) chemical species, and that the ionized (NH4+) species is nontoxic or significantly less toxic than NH3. Data are presented here on the toxicity of ammonia to rainbow trout (Salmo gairdneri) and to fathead minnows (Pimephales promelas) from two series of 96-h flow-through toxicity tests in which pH was controlled within the range 6.5-9.0. Results show that the toxicity of ammonia in terms of NH3 increased at lower pH values. It is concluded that NH4+ exerts some measure of toxicity and/or that increased H+ concentration increases the toxicity of NH3. It is recommended that water quality criteria be revised to consider the pH dependence of the toxicity of ammonia. |
| Supplementary Notes |
Pub. in Environmental Science and Technology, v15 n7 p837-839 Jul 81. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Ammonia Toxicity to Fishes. Effect of pH on the Toxicity of the Un-ionized Ammonia Species. |
| PUB Date Free Form |
Jul 81 |
| Category Codes |
6T; 6F; 57Y; 68D |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/03 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
323815261 |
| Origin |
NTIS |
| Type |
CAT |
