Articles | Volume 20, issue 1
Review article
18 Jan 2016
Review article |  | 18 Jan 2016

Carbon and nitrogen dynamics and greenhouse gas emissions in constructed wetlands treating wastewater: a review

M. M. R. Jahangir, K. G. Richards, M. G. Healy, L. Gill, C. Müller, P. Johnston, and O. Fenton

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Cited articles

á Norði, K. and Thamdrup, B.: Nitrate-dependent anaerobic methane oxidation in a freshwater sediment, GeochiM. Cosmochim. Acta, 132, 141–150, 2014.
Addy, K., Kellogg, D. Q., Gold, A. J., Groffman, P. M., Ferendo, G., and Sawyer, C.: In situ push-pull method to determine groundwater denitrification in riparian zones, J. Environ. Qual., 31, 1017–1024, 2002.
Bachand, P. A. M. and Horne, A. J.: Denitrification in constructed free-water surface wetlands: II. Effects of vegetation and temperature, Ecol. Eng., 14, 17–32, 2000.
Baily, A., Rock, L., Watson, C. J., and Fenton, O.: Spatial and temporal variations in groundwater nitrate at an intensive dairy farm in south-east Ireland: Insights from stable isotope data, Agril. Ecosysts. Environ., 308–318, 2011.
Beaulieu, J. J., Tank, J. L., Hamilton, S. K., Wollheim, W. M., Hall, R. O., and Mulholland, P. J.: Nitrous oxide emission from denitrification in stream and river networks, P. Natl. Acad. Sci., 108, 214–219, 2011.
Short summary
Removal efficiency of carbon and nitrogen in constructed wetlands is inconsistent and does not reveal whether the removal processes are from physical attenuation or transformation to other reactive forms. Previous research did not consider "pollution swapping" driven by transformational processes. Herein the biogeochemical dynamics and fate of carbon and nitrogen and their potential impact on the environment, as well as novel ways in which these knowledge gaps may be eliminated, are explored.