DOI: 10.1007/s10533-017-0365-2
Scopus记录号: 2-s2.0-85027137118
论文题名: Effects of storm size and frequency on nitrogen retention, denitrification, and N2O production in bioretention swale mesocosms
作者: Norton R.A. ; Harrison J.A. ; Kent Keller C. ; Moffett K.B.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 134, 期: 3 起始页码: 353
结束页码: 370
语种: 英语
英文关键词: Bioretention swales
; Denitrification
; N2O production
; Nitrogen retention
; Storm frequency
; Storm size
; Stormwater
Scopus关键词: biological production
; denitrification
; dissolved inorganic nitrogen
; dissolved organic nitrogen
; experimental study
; mesocosm
; nitrogen
; nitrous oxide
; retention
; storm
; wastewater treatment
英文摘要: Reported nitrogen (N) retention efficiencies for bioretention swales vary widely, but reasons for this are not well-understood, in part because almost no studies have measured (or characterized controls on) bioretention swale denitrification. Here, we apply a novel N2:Ar-based approach, in coordination with more established approaches, to estimate denitrification rates and compare bioretention N dynamics during artificial storms of two sizes (3.05 and 5.08 cm days−1) and following 4 inter-storm periods (initial storm with no prior storm, 1-, 7-, and 13-days). Denitrification rates during storms occurring after 7-days (520 ± 150 µmol N m−2 h−1) were significantly higher than those during an initialization storm (13 ± 34 µmol N m−2 h−1) or during a storm occurring one day after a previous storm (−63 ± 65 µmol N m−2 h−1). No significant differences in N processing were observed between 3.05 and 5.08 cm days−1 storms. Somewhat surprisingly, in all experiments [O2] remained near saturated, and N2O emissions were very low or undetectable. Mesocosms were largely a net sink for dissolved inorganic N (DIN) and a net source of dissolved organic N (DON). Denitrification was neither a dominant nor consistent pathway for N removal, accounting for a maximum of 23 ± 11% of DIN removal. Future research should continue to evaluate N assimilation as a N removal pathway in bioretention swales, as well as characterize N dynamics during unsaturated conditions associated with smaller rain events and during periods between the large storms examined here. © 2017, Springer International Publishing AG. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83246
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: School of the Environment, Washington State University- Vancouver, Vancouver, WA, United States; School of the Environment, Washington State University, Pullman, WA, United States
Recommended Citation:
Norton R.A.,Harrison J.A.,Kent Keller C.,et al. Effects of storm size and frequency on nitrogen retention, denitrification, and N2O production in bioretention swale mesocosms[J]. Biogeochemistry,2017-01-01,134(3)