The Fate of Ammonium in Integrated Vertical-flow Constructed Wetlands Using Stable Isotope Technique

被引：6
|
作者：
Hu, Yun [1 ,2 ]
He, Feng [1 ]
Wang, Long [1 ,2 ]
Sun, Jian [1 ,2 ]
Huang, Tao [1 ,2 ]
Wu, Zhenbin [1 ]
机构：
[1] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
POLISH JOURNAL OF ENVIRONMENTAL STUDIES | 2016年 / 25卷 / 03期
基金：
中国国家自然科学基金;
关键词：
ammonium; integrated vertical-flow constructed wetland; N-15; tracer; plant uptake; stable isotope technique; HORIZONTAL SUBSURFACE FLOW; NITROGEN TRANSFORMATIONS; OXIDATION; REMOVAL; MICROBIOLOGY; SYSTEMS; N-15;
D O I：
10.15244/pjoes/61534
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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.
引用
收藏
页码：1027 / 1032
页数：6
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