DOI: 10.1016/j.watres.2018.06.005
Scopus记录号: 2-s2.0-85049322328
论文题名: Anoxic nitrogen cycling in a hydrocarbon and ammonium contaminated aquifer
作者: Wells N.S. ; Kappelmeyer U. ; Knöller K.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 373
结束页码: 382
语种: 英语
英文关键词: Biodegradation
; Chemolithotrophic N cycling
; Contaminated groundwater
; Nitrate dual isotopes
; Nitrite
; Stable isotopes
Scopus关键词: Aquifers
; Biodegradation
; Contamination
; Genes
; Groundwater resources
; Hydrocarbons
; Hydrogeology
; Isotopes
; Nitrogen oxides
; Alternative electron acceptors
; Contaminated aquifer
; Contaminated groundwater
; Fate and transport
; Isotopic composition
; N cycling
; Nitrite
; Stable isotopes
; Groundwater pollution
; ammonia
; ground water
; hydrocarbon
; iron
; nitrate
; nitric oxide
; oxygen
; ammonium
; anoxic conditions
; aquifer pollution
; biodegradation
; environmental fate
; hydrocarbon
; isotopic composition
; nitrate
; nitrite
; nitrogen cycle
; pollutant transport
; stable isotope
; aquifer
; Article
; nitrogen cycling
; oxidation reduction potential
; priority journal
英文摘要: Nitrogen fate and transport through contaminated groundwater systems, where N is both ubiquitous and commonly limits pollutant attenuation, must be re-evaluated given evidence for new potential microbial N pathways. We addressed this by measuring the isotopic composition of dissolved inorganic N (DIN = NH4 +, NO2 −, and NO3 −) and N functional gene abundances (amoA, nirK, nirS, hszA) from 20 to 38 wells across an NH4 +, hydrocarbon, and SO4 2− contaminated aquifer. In-situ N attenuation was confirmed on three sampling dates (0, +6, +12 months) by the decreased [DIN] (4300 - 40 μM) and increased δ15N-DIN (5‰–33‰) over the flow path. However, the assumption of negligible N attenuation within the plume was complicated by the presence of alternative electron acceptors (SO4 2−, Fe3+), both oxidizing and reducing functional genes, and N oxides within this anoxic zone. Active plume N cycling was corroborated using an NO2 − dual isotope based model, which found the fastest (∼10 day) NO2 − turnover within the N and electron donor rich central plume. Findings suggest that N cycling is not always O2 limited within chemically complex contaminated aquifers, though this cycling may recycle the N species rather than attenuate N. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112635
Appears in Collections: 气候减缓与适应
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作者单位: Dept. of Catchment Hydrology, Helmholtz Centre for Environmental Research – UFZ, Theodor-Lieser Str. 4, Halle (Saale), 06120, Germany; Dept. of Environmental Biotechnology, Helmholtz Centre for Environmental Research – UFZ, Permoserstr. 15, Leipzig, 04318, Germany; Centre for Coastal Biogeochemistry, School of Environment, Science & Engineering, Southern Cross University, Military Rd, Lismore, NSW 2480, Australia
Recommended Citation:
Wells N.S.,Kappelmeyer U.,Knöller K.. Anoxic nitrogen cycling in a hydrocarbon and ammonium contaminated aquifer[J]. Water Research,2018-01-01,142