Nitrogen transformations in a waterhyacinth-based water treatment system. [Eichornia crassipes (Mart. ) Solms]
Fate of added /sup 15/NH/sub 4/-N and /sup 15/NO/sub 3/-N in waterhyacinth (Eichhornia crassipes (Mart.) Solms)-based water treatment system was evaluated under controlled conditions. Labeled /sup 15/NH/sub 4/-N uptake by waterhyacinth exceeded /sup 15/NO/sub 3/-N uptake. Total /sup 15/N recovery by waterhyacinth ranged from 57 to 72% for added /sup 15/NO/sub 3/-N and 70 to 89% for added /sup 15/NH/sub 4/-N. Both sediment and detritus were potential sources of N for waterhyacinths. Waterhyacinths cultured in sewage effluent removed 55% of the added /sup 15/NH/sub 4/-N and 14% of the added /sup 15/NO/sub 3/-N, respectively. Three to 44% of the added /sup 15/NH/sub 4/-N was lost through nitrification in the water column and subsequent denitrification in the underlying sediments, whereas 24 to 86% of the added /sup 15/NO/sub 3/-N was lost through denitrification. In a system without plants, 13 to 89% of the added /sup 15/NH/sub 4/-N and 48 to 96% of the added /sup 15/NO/sub 3/-N were lost from the system through a combination of nitrification/denitrification and NH/sub 3/ volatilization.
- Research Organization:
- Univ. of Florida, Gainesville (USA)
- OSTI ID:
- 5350727
- Journal Information:
- J. Environ. Qual.; (United States), Vol. 17:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LIQUID WASTES
DENITRIFICATION
WATER HYACINTHS
USES
AMMONIUM COMPOUNDS
DETRITUS
EVAPORATION
METABOLISM
NITRATES
NITRIFICATION
NITROGEN 15
NITROGEN COMPOUNDS
REMOVAL
SEDIMENTS
TRACER TECHNIQUES
WATER TREATMENT
AQUATIC ORGANISMS
CHEMICAL REACTIONS
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
NITROGEN ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PLANTS
STABLE ISOTOPES
WASTES
520101* - Environment
Aquatic- Basic Studies- Radiometric Techniques- (-1989)