Main Title |
Nitrate removal from water at the water-mud interface in wetlands / |
Author |
Patrick, W. H. ;
Patrick, Jr., W. H. ;
Delaune, R. D. ;
Engler, R. M. ;
Gotoh., S.
|
Other Authors |
|
CORP Author |
Louisiana State Univ., Baton Rouge. Agricultural Experiment Station.;Environmental Research Lab., Corvallis, Oreg. |
Publisher |
U.S. Environmental Protection Agency, Office of Research and Development, Corvallis Environmental Research Laboratory, |
Year Published |
1976 |
Report Number |
EPA-600/3-76-042; EPA-R-800428 |
Stock Number |
PB-253 791 |
OCLC Number |
02321854 |
Subjects |
Nitrates ;
Nitrification ;
Soils--Nitrogen content ;
Water--Nitrogen content
|
Additional Subjects |
Limnology ;
Marshes ;
Oxidation reduction reactions ;
Nitrogen ;
Soils ;
Inorganic nitrates ;
Nitrification ;
Ammonium ;
Oxygen ;
Diffusion ;
Anaerobic processes ;
Aerobic processes ;
Interfaces ;
Soil profiles ;
Flooding ;
Measurement ;
Louisiana ;
Denitrification ;
Organic matter
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EJBD |
EPA 600/3-76-042 |
c.1 |
Headquarters Library/Washington,DC |
03/10/2014 |
ELBD ARCHIVE |
EPA 600/3-76-042 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
ELBD RPS |
EPA 600-3-76-042 |
repository copy |
AWBERC Library/Cincinnati,OH |
11/12/2014 |
ESAD |
EPA 600-3-76-042 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
NTIS |
PB-253 791 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
viii, 80 pages : illustrations ; 28 cm |
Abstract |
The oxidized and reduced layers in flooded soil were characterized by vertical distribution of the oxidation-reduction (redox) potential and concentrations of manganous manganese, ferrous iron, sulfide, nitrate and ammonium. The apparent thickness of the oxidized layer was different when evaluated by the distribution of these various components in the profile. Flood water NO3 removal rates of intermittently-flooded freshwater swamp soils and continuously-flooded saline marsh soils indicated that the area of NO3 reduction was in the soil, added organic matter increased the rate of NO3 reduction and the reduction rate was approximately twice as fast in the marsh soil as in the swamp soil. Atmospheric O2 over a flooded soil increased denitrification up to a concentration of approximately 20%. The N loss appeared to be related to the thickness of the sediments aerobic layer. Ammonium nitrogen in a flooded soil exposed to O2 from the water column undergoes sequential nitrification and denitrification. Ammonium nitrogen is nitrified in the aerobic zone, diffuses to the anaerobic zone where it is denitrified to N2 and N2O and then diffuses from the system. |
Notes |
"Grant no. 800428." Includes bibliographical references (pages 78-79). |