Nitrous oxide emissions and the use of wetlands for water quality amelioration
Article Abstract:
Wetlands reduce the global riverine export of nitrate from terrestrial systems but appear to pollute the atmosphere by releasing large amounts of nitrous oxide. The diversion of water flow through an experimental wetland over a 20-week period showed a 200% increase in nitrate release and more than 95% reduction in nitrous oxide emission. The results were caused by the occurrence of more aerobic conditions that allowed the aerobic mineralization and nitrification of nitrogen-containing compounds and the absence of anaerobic denitrification.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Sulfate-induced eutrophication and phytotoxicity in freshwater wetlands
Article Abstract:
The addition of sulfate greatly increases ammonium, phosphate and potassium concentrations in treated soils because of the reduced uptake by plants and extra mineralization. The availability of readily decomposable organic matter, however, governs sulfate availability. The observed changes in free sulfide concentrations and in the rate of nutrient mobilization can be good indicators of changes in plant species composition of freshwater wetlands like direct eutrophication caused by the import of nutrients.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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Studies of CO2 hydrate formation and dissolution
Article Abstract:
An innovative way of conducting high-pressure experimentation is presented. A minimum ratio of carbon dioxide (CO2) to water was laid out to obtain stable traces of hydrate. Exposure to an intermittent flow of water caused the decomposition of the CO2 hydrate. A model of pathways in the the formation of CO2 hydrate is also presented.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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