Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1007/s11356-014-3575-3
Volltext Shareable Link
Titel (primär) Microbial nitrogen transformation in constructed wetlands treating contaminated groundwater
Autor Coban, O.; Kuschk, P.; Wells, N.S.; Strauch, G.; Knoeller, K.
Quelle Environmental Science and Pollution Research
Erscheinungsjahr 2015
Department UBT; CATHYD
Band/Volume 22
Heft 17
Seite von 12829
Seite bis 12839
Sprache englisch
Keywords Nitrogen; Ammonium; Constructed wetland; Nitrification; Denitrification; Isotope fractionation
UFZ Querschnittsthemen RU2;
UFZ Bestand Treatment of pollution in constructed wetlands: from the fundamental mechanisms to the full scale applications. WETPOL 2013
Abstract Pathways of ammonium (NH4 +) removal were investigated using the stable isotope approach in constructed wetlands (CWs). We investigated and compared several types of CWs: planted horizontal subsurface flow (HSSF), unplanted HSSF, and floating plant root mat (FPRM), including spatial and seasonal variations. Plant presence was the key factor influencing efficiency of NH4 + removal in all CWs, what was illustrated by lower NH4 +-N removal by the unplanted HSSF CW in comparison with planted CWs. No statistically significant differences in NH4 + removal efficiencies between seasons were detected. Even though plant uptake accounted for 32–100 % of NH4 + removal during spring and summer in planted CWs, throughout the year, most of NH4 + was removed via simultaneous nitrification-denitrification, what was clearly shown by linear increase of δ15N-NH4 + with decrease of loads along the flow path and absence of nitrate (NO3 ) accumulation. Average yearly enrichment factor for nitrification was −7.9 ‰ for planted HSSF CW and −5.8 ‰ for FPRM. Lack of enrichment for δ15N-NO3 implied that other processes, such as nitrification and mineralization were superimposed on denitrification and makes the stable isotope approach unsuitable for the estimation of denitrification in the systems obtaining NH4 + rich inflow water.
dauerhafte UFZ-Verlinkung
Coban, O., Kuschk, P., Wells, N.S., Strauch, G., Knoeller, K. (2015):
Microbial nitrogen transformation in constructed wetlands treating contaminated groundwater
Environ. Sci. Pollut. Res. 22 (17), 12829 - 12839 10.1007/s11356-014-3575-3