Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1007/s11356-014-3575-3 |
| Document | Shareable Link |
| Title (Primary) | Microbial nitrogen transformation in constructed wetlands treating contaminated groundwater |
| Author | Coban, O.; Kuschk, P.; Wells, N.S.; Strauch, G.; Knoeller, K. |
| Source Titel | Environmental Science and Pollution Research |
| Year | 2015 |
| Department | UBT; CATHYD |
| Volume | 22 |
| Issue | 17 |
| Page From | 12829 |
| Page To | 12839 |
| Language | englisch |
| Keywords | Nitrogen; Ammonium; Constructed wetland; Nitrification; Denitrification; Isotope fractionation |
| UFZ wide themes | RU2; |
| UFZ inventory | 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. |
| 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 |
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