Measurements of N2O from composted organic wastes
Article Abstract:
Nitrous oxide (N2O) is an important trace gas that is 200 times more efficient than carbon dioxide for absorbing infrared radiation. It is also the source of nitrogen oxides which cause ozone layer depletion. There is evidence suggesting that N2O in the atmosphere is increasing due to the increase in the anthropogenic sources of N2O emissions. Although it is important, a further increase in the rate of N2O emissions pose risks to the environment and human health. A study measuring N2O emissions from natural sources such as sludge and livestock waste compost is presented.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Preliminary investigation into the effects of carbonation on cement-solidified hazardous wastes
Article Abstract:
Carbonation is seen to have a major influence on the properties of cement-solidified waste forms. It significantly alters CSH gel products which play a large role in the fixation of toxic species. Calcite is also produced from the direct reaction of portlandite with CO2. The formation of calcium carbonate leads to the increase in hydration of C3S, thus achieving higher strength values. A significant reduction in leachable metals extracted is also noted.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Supercritical fluids tackle hazardous wastes
Article Abstract:
The Texaco Chemical Co is currently building the world's first supercritical water oxidation (SWO) reactor for treating organic wastes. SWO and supercritical fluid extraction (SFE) are gaining recognition as environmentally safe methods for treating toxic waste. Although both SWO and SFE suffer from problems in terms of reactor corrosion and scale-up limitations, the two techniques can be an attractive alternative for some applications.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1993
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