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题名: Quantification of N2O and NO emissions from a small-scale pond-ditch circulation system for rural polluted water treatment
作者: Ma, Lin1, 2; Tong, Weijun1, 2; Chen, Hongguang1, 2; Sun, Jian1, 2; Wu, Zhenbin1; He, Feng1
关键词: Pond-ditch circulation system (PDCS) ; Nitrous oxide (N2O) ; Nitric oxide (NO) ; Emission flux ; Partial least squares (PLS)
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
发表日期: 2018-04-01
DOI: 10.1016/j.scitotenv.2017.11.192
卷: 619, 页:946-956
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: The pond-ditch circulation system(PDCS) is an efficient and economical solution for the restoration of degraded ruralwater environments. However, little is known about nitrous oxide (N2O) and nitric oxide (NO) emissions in the microbial removal process of nitrogen in PDCSs, and their contribution to nitrogen removal. The aim of this study was to quantify N2O and NO emissions from the PDCS, evaluate their capacities, and elucidate the key environmental factors controlling them. The results showed that N2O and NO fluxes were in the ranges 1.1-2055.1 mu g Nm(-2) h(-1) and 0.1-6.8 mu g Nm(-2) h(-1) for the PDCS, respectively. Meanwhile, the N2O and NO fluxes from the two ponds in the PDCS were significantly higher than those in the static system. Moreover, the amount of N2O and NO emissions in the PDCS accounted for 0.17-4.32% of the total nitrogen (TN) removal. According to the partial least squares (PLS) approach and Pearson's correlation coefficients, nitrate nitrogen in water (W-NO3-N), dissolved oxygen in water (W-DO), dissolved oxygen in sediment (DO), pH in water (W-pH), pH in sediment (pH), total kjeldahl nitrogen (TKN), and soil organic carbon (SOC) significantly affected the N2O flux (p < 0.05), whereas W-NO3--N, DO, and nitrite nitrogen in sediment (NO2--N) significantly affected the NO emission (p < 0.05). (c) 2017 Elsevier B.V. All rights reserved.
关键词[WOS]: NITROUS-OXIDE EMISSION ; DOMESTIC WASTE-WATER ; FLOW CONSTRUCTED WETLANDS ; GREENHOUSE-GAS EMISSIONS ; NITRIC-OXIDE ; DISSOLVED-OXYGEN ; OXIDIZING BACTERIA ; NUTRIENT REMOVAL ; SLUDGE TREATMENT ; NORTH CHINA
语种: 英语
项目资助者: National Natural Science Foundation of China(51709255) ; China Postdoctoral Science Foundation(2017M622555)
WOS记录号: WOS:000424144200096
ISSN号: 0048-9697
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/50652
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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