DOI: 10.1016/j.watres.2018.08.043
Scopus记录号: 2-s2.0-85053049293
论文题名: High ammonium loading can increase alkaline phosphatase activity and promote sediment phosphorus release: A two-month mesocosm experiment
作者: Ma S.N. ; Wang H.J. ; Wang H.Z. ; Li Y. ; Liu M. ; Liang X.M. ; Yu Q. ; Jeppesen E. ; Søndergaard M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 145 起始页码: 388
结束页码: 397
语种: 英语
英文关键词: Alkaline phosphatase activity
; Ammonium loading
; Dissolved oxygen
; Sediment phosphorus release
Scopus关键词: Ammonia
; Aquatic ecosystems
; Aquatic organisms
; Biochemical oxygen demand
; Chlorine compounds
; Effluent treatment
; Effluents
; Nitrogen fertilizers
; Phosphatases
; Phosphorus
; Regression analysis
; Sediments
; Wastewater treatment
; Alkaline phosphatase activity
; Contributing factor
; Diffusive gradients in thin films
; Effluent discharge
; In-situ measurement
; Phosphorus release
; Sediment water interface
; Wastewater treatment plants
; Dissolved oxygen
; ammonium compound
; aquatic organism
; concentration (composition)
; dissolved oxygen
; effluent
; enzyme
; enzyme activity
; experimental study
; mesocosm
; phosphatase
; phosphorus
; sediment analysis
; sediment pollution
; sediment-water interface
; toxicity
; wastewater
; wastewater treatment
英文摘要: In aquatic ecosystems, ammonium is one of the dominant substances in the effluent discharge from wastewater treatment plants and its impact has been widely explored as it is thought, in its toxic form (NH3), to cause stress on organisms. Little is, however, known about its potential effect on the release of phosphorus (P) from the sediment. In a two-month mesocosm (150 L) experiment, we tested if high loading of ammonium promotes sediment P release and investigated the dominant underlying mechanisms. A gradient of five target ammonium loading levels was used by adding NH4Cl fertilizer: no addition/control (N0), 3 (N1), 5 (N2), 10 (N3), and 21 (N4) mg NH4Cl L−1 (NH4Cl expressed as nitrogen). We found that: 1) significant sediment P release for N3 and N4 but minor release or retention for N0, N1, and N2 were detected both by the total phosphorus concentration (TP) in the overlying water and in situ measurements of diffusive gradients in thin-films (DGT) at the sediment-water interface; 2) overall, TP correlated significantly and positively with total nitrogen (TN) concentrations in the water. Further correlation and path analyses suggested that stimulated alkaline phosphatase activity (APA) was likely the dominant mechanisms behind the ammonium-induced sediment P release and decreased dissolved oxygen (DO) levels (an approximate reduction from 9.2 to 6.6 mg O2 L−1) was likely a contributing factor, particularly in the beginning of the experiment. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112421
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing, 100000, China; Department of Bioscience and Arctic Research Centre, Aarhus University, Silkeborg, 8600, Denmark; Sino-Danish Centre for Education and Research, Beijing, 100049, China
Recommended Citation:
Ma S.N.,Wang H.J.,Wang H.Z.,et al. High ammonium loading can increase alkaline phosphatase activity and promote sediment phosphorus release: A two-month mesocosm experiment[J]. Water Research,2018-01-01,145