Emissions of NO and N2O in wetland microcosms for swine wastewater treatment

被引：11
|
作者：
Zhang, Shunan [1 ,2 ,3 ]
Liu, Feng [1 ,2 ]
Xiao, Runlin [1 ,2 ]
Li, Yong [1 ,2 ]
Zhou, Juan [1 ,2 ,3 ]
Wu, Jinshui [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China
[2] Chinese Acad Sci, Inst Subtrop Agr, Changsha Res Stn Agr & Environm Monitoring, Changsha 410125, Hunan, Peoples R China
[3] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
来源：
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2015年 / 22卷 / 24期
关键词：
Nitric oxide; Nitrous oxide; Greenhouse gas; N removal; Constructed wetland; NITROUS-OXIDE PRODUCTION; CONSTRUCTED WETLANDS; NITRIC-OXIDE; GREENHOUSE GASES; COD/N RATIO; REMOVAL; METHANE; CH4; DENITRIFICATION;
D O I：
10.1007/s11356-015-5210-3
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Nitric oxide (NO) and nitrous oxide (N2O) emitted from wetland systems contribute an important proportion to the global warming effect. In this study, four wetland microcosms vegetated with Myriophyllum elatinoides (WM), Alternanthera philoxeroides (WA), Eichhornia crassipes (WE), or without vegetation (NW) were compared to investigate the emissions of NO and N2O during nitrogen (N) removal process when treating swine wastewater. After 30-day incubation, TN removal rates of 96.4, 74.2, 97.2, and 47.3 % were observed for the WM, WA, WE, and NW microcosms, respectively. Yet, no significant difference was observed in WM and WE (p > 0.05). The average NO and N2O emissions in WE was significantly higher than those in WM, WA, and NW (p < 0.05). In addition, the emission of N2O in WE accounted for 2.10 % of initial TN load and 2.17 % of the total amount of TN removal, compared with less than 1 % in the other microcosms. These findings indicate that wetland vegetated with M. elatinoides may be an optimal system for swine wastewater treatment, based on its higher removal of N and lower emissions of NO and N2O.
引用
收藏
页码：19933 / 19939
页数：7
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