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Transport and trans...
Transport and transformation of de-icing urea from airport runways in a constructed wetland system
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Thorén, AK (författare)
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- Legrand, Catherine (författare)
- Högskolan i Kalmar,Naturvetenskapliga institutionen
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- Herrmann, Jan (författare)
- Högskolan i Kalmar,Naturvetenskapliga institutionen
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(creator_code:org_t)
- 2003
- 2003
- Engelska.
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Ingår i: Water Science and Technology. - 0273-1223 .- 1996-9732. ; 48:5, s. 283-290
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- Urea, NH2-CO-NH2, is used as a de-icing agent at Kalmar Airport, southeast Sweden. During 1998-2001, urea contributed on average 30% of the yearly nitrogen (N) transport of 41,000 kg via Tornebybacken stream to the coastal zone of the Baltic Sea. In order to reduce stream transport of N from airport, agricultural and other diffuse sources, a wetland was constructed in 1996. Annual wetland retention of total-N varied in the range of 2,500-8,1100 kg (6-36% of influent) during 1998-2001, according to mass balances calculated from monthly sampling. During airport de-icing, January-March 2001, 660 kg urea-N out of 2,600 kg applied urea-N reached the wetland according to daily sampling. This indicated that 75% of the urea was transformed before entering the wetland. Urea was found to be only a minor part (8%) of total-N in the wetland influent. Calculations of cumulative urea-N loads at the wetland inlet and outlet respectively, showed a significant urea. transformation during February 2001 with approximately 40% of the incoming urea-N being transformed in the wetland system. These results show that significant amounts of urea can be transformed in a wetland system at air temperatures around 0degreesC.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Annan naturresursteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Other Environmental Engineering (hsv//eng)
Nyckelord
- Terrestrial, freshwater and marine ecology
- Terrestrisk, limnisk och marin ekologi
- Environmental engineering
- Miljöteknik
- Akvatisk ekologi
- Aquatic Ecology
- Environmental technology
- Miljöteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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