We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
基于<sup>15</sup>N稳定同位素示踪技术的植物组合湿地对氨氮去除途径研究.
- Authors
徐英华; 李希; 谢陈; 李裕元; 吴金水
- Abstract
Constructed wetlands (CWs) are an important method for the ecological remediation of polluted water bodies. Their removal efficiency of nitrogen (N) is remarkable. The N removal efficiency varies across CWs with different plant species. The questions are whether this efficiency is improved in CWs with plant combinations, and how is the removal path worthy of further study. In this study, Myriophyllum elatinoides and Pontederia cordata were used as research objects and examined through controlled laboratory experiments. The pathways for ammonia nitrogen (NH4+-N) removal were investigated using the 15N stable isotope tracer technique in M. elatinoides, P. cordata, and M. elatinoides + P. cordata combination. Compared with single plant, M. elatinoides and P. cordata, N removal amount of M. elatinoides + P. cordata combination was increased by 1.8% and 3.6%, respectively. According to the 15N mass balance, the contributions to N removal by M. elatinoides, P. cordata, and their combination through sediment adsorption were 8.30%, 7.96%, and 6.94%, respectively, through plant uptake were 41.76%, 35.34%, and 48.67%, respectively, and through microbial action were 49.94%, 56.71%, and 44.39%, respectively. Microbial action played a dominant role in N removal process in CWs. Compared with single plant CWs, plant combination CWs could improve N removal efficiency and enhance NH4+-N uptake by plants from water. This study is helpful to better understand the removal pathway of NH4+-N in plant combinations CWs.
- Publication
Journal of Ecology & Rural Environment, 2024, Vol 40, Issue 7, p933
- ISSN
1673-4831
- Publication type
Article
- DOI
10.19741/j.issn.1673-4831.2023.1168