| Main Title |
Combined Effects of Chlorine and Ammonia on Litter Breakdown in Outdoor Experimental Streams. |
| Author |
Newman, R. M. ;
Perry, J. A. ;
|
| CORP Author |
Minnesota Univ., St. Paul. Dept. of Forest Resources.;Environmental Research Lab., Duluth, MN. |
| Publisher |
c1989 |
| Year Published |
1989 |
| Report Number |
EPA-R812468; EPA/600/J-89/274; |
| Stock Number |
PB90-185141 |
| Additional Subjects |
Chlorine ;
Water pollution ;
Ammonia ;
Aquatic plants ;
Streams ;
Tables(Data) ;
Graphs(Charts) ;
Biodeterioration ;
Reprints ;
Decontamination ;
Potamogeton crispus
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB90-185141 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
13p |
| Abstract |
The response of Potamogeton crispus L. breakdown to controlled doses of different levels of chlorine and chlorine + ammonia was investigated over two years in outdoor experimental streams. In 1985, downstream riffles of 2 streams were dosed (observed in-stream concentrations) at ca. 10 micro g/L Total Residual Chlorine (TRC), one stream at 64 micro g/L TRC and one stream at 230 micro g/L TRC. Two control streams were not dosed and the upstream riffles of each stream served as within stream controls. In Aug-Sep, all three streams with chlorine + ammonia (6, 56 and 146 micro g/L TRC + 2.5 mg/L ammonia) and the 70 micro g/L TRC alone stream had significantly lower decomposition rates in the downstream dosed sites. For these streams, downstream decay rates ranged from 46% (high chlorine + ammonia) to 73% (low chlorine + ammonia) of the upstream control rates. No other up-down pairs were different during the trial. Up and downstream sites of the stream dosed with 2.5 mg/L ammonia alone were nearly identical for both trials (<3% difference). These results indicate that TRC at less than 250 micro g/L can significantly reduce litter decomposition and strongly suggest that addition of ammonia to chlorinated water can increase the toxic effect of chlorine. (Copyright (c) 1989 Kluwer Academic Publishers.) |
| Supplementary Notes |
Pub. in Hydrobiologia, v184 p69-78 Nov 89. Sponsored by Environmental Research Lab., Duluth, MN. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Combined Effects of Chlorine and Ammonia on Litter Breakdown in Outdoor Experimental Streams. |
| Category Codes |
68D; 48G |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/03 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
011721504 |
| Origin |
NTIS |
| Type |
CAT |
