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Transport and transformation of de-icing urea from airport runways in a constructed wetland system
University of Kalmar, School of Pure and Applied Natural Sciences.ORCID iD: 0000-0001-7155-3604
University of Kalmar, School of Pure and Applied Natural Sciences.
2003 (English)In: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Water Science and Technology, Vol. 48, no 5, p. 283-290Article in journal (Refereed) Published
Abstract [en]

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. 

Place, publisher, year, edition, pages
2003. Vol. 48, no 5, p. 283-290
National Category
Ecology Other Environmental Engineering
Research subject
Natural Science, Aquatic Ecology; Environmental Science, Environmental technology
Identifiers
URN: urn:nbn:se:lnu:diva-1646OAI: oai:DiVA.org:lnu-1646DiVA, id: diva2:308692
Note

8th International Conference on Wetland Systems for Water Pollution Control, ARUSHA, TANZANIA, SEP 16-19, 2002

Available from: 2010-04-06 Created: 2010-04-06 Last updated: 2017-12-12Bibliographically approved

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Legrand, CatherineHerrmann, Jan

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf