Research
| Title： | The Fate of Ammonium in Integrated Vertical-flow Constructed Wetlands Using Stable Isotope Technique |
|---|---|
| First author： | Hu, Yun; He, Feng; Wang, Long; Sun, Jian; Huang, Tao; Wu, Zhenbin |
| Journal： | POLISH JOURNAL OF ENVIRONMENTAL STUDIES |
| Years： | 2016 |
| DOI： | 10.15244/pjoes/61534 |
| Abstract： | The fate of ammonium (NH4+) was investigated using the N-15 tracer stable isotope technique in integrated vertical-flow constructed wetlands (IVCWs). Two types of IVCW systems were built: unplanted IVCWs (control) and planted IVCWs. The results showed that a high NH4+ removal efficiency (95.4%) in the planted IVCWs. Plants not only removed NH4+ by direct uptake (13.6 +/- 0.7%) but also improved the NH4+ removal capacity of IVCWs, compared with the control. Besides plant uptake, microbial conversion was the dominant mechanism of NH4+ removal in IVCWs, and a large proportion (75.2-85.6%) of added NH4+ may be permanently removed via anammox and nitrification-denitrification processes in IVCWs. |
