Controls of oxygen isotope ratios of nitrate formed during nitrification in soils
- 1. Institut fuer Geologie, Ruhr-Universitaet Bochum, Bochum (Germany)
- 2. Geographisches Institut, Ruhr-Universitaet Bochum, Bochum (Germany)
- 3. Ottawa-Carleton Geoscience Centre, University of Ottawa, Ottawa, ON (Canada)
Description
The isotopic composition of nitrate is increasingly used to determine sources and transformations of nitrogen in terrestrial and aquatic ecosystems. Oxygen isotope ratios of nitrate appear to be particularly useful, since they allow the differentiation between nitrate from atmospheric deposition (δ18Onitrate between +25 and +70 per mille), nitrate from fertilizers (δ18Onitrate +23 per mille), and nitrate derived from nitrification processes in soils (δ18Onitrate < +15 per mille). For the latter, it is assumed that two of the oxygen atoms in the NO3 molecule derive from H2O (with negative δ18O values dependent upon location) and one oxygen derives from atmospheric O2 (δ18O = +23.5 per mille).. The objective of this study was to experimentally determine the extent to which water oxygen controls the δ18O value of nitrate, which is formed during nitrification in soils
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Additional details
Publishing Information
- Imprint Title
- Isotope techniques in water resources development and management. Proceedings
- Imprint Pagination
- [CD-ROM]
- Journal Issue
- no. 2/C
- Series
- C and S papers series
- Journal Page Range
- [2 p.]
- ISSN
- 1562-4153
Conference
- Title
- International symposium on isotope techniques in water resources development and management
- Dates
- 10-14 May 1999
- Place
- Vienna (Austria)
INIS
- Country of Publication
- International Atomic Energy Agency (IAEA)
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 31009489
- Subject category
- S58: GEOSCIENCES;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ENVIRONMENTAL TRANSPORT; FERTILIZERS; GROUND WATER; ISOTOPE RATIO; NITRATES; NITROGEN 15; OXYGEN 18; POLLUTION SOURCES; SURFACE WATERS; WATER POLLUTION
- Descriptors DEC
- EVEN-EVEN NUCLEI; HYDROGEN COMPOUNDS; ISOTOPES; LIGHT NUCLEI; MASS TRANSFER; NITROGEN COMPOUNDS; NITROGEN ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; OXYGEN COMPOUNDS; OXYGEN ISOTOPES; POLLUTION; STABLE ISOTOPES; WATER
Optional Information
- Notes
- Data in PDF format; Acrobat Reader for Windows 3.x, 95, 98, NT and Macintosh included. 1 ref., 1 fig
- Secondary number(s)
- IAEA-CSP--2/C; IAEA-SM--361