Record Display for the EPA National Library Catalog


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
Author Title of a Work
DeLaune, R. D.,
Engler, Robert M.,
Gotoh, S.,
Patrick, W. H.
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
Description Access URL
Library Call Number Additional Info Location Last
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
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.
"Grant no. 800428." Includes bibliographical references (pages 78-79).