DOI: 10.1007/s10533-013-9879-4
Scopus记录号: 2-s2.0-84897446130
论文题名: Sulphate reduction and calcite precipitation in relation to internal eutrophication of groundwater fed alkaline fens
作者: Cirkel D.G. ; Van Beek C.G.E.M. ; Witte J.P.M. ; Van der Zee S.E.A.T.M.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 117, 期: 2018-02-03 起始页码: 375
结束页码: 393
语种: 英语
英文关键词: Alkaline fens
; Calcite
; Internal eutrophication
; Pyrite oxidation
; Sulphate reduction
; Upward seepage
Scopus关键词: alkalinity
; atmospheric deposition
; calcite
; concentration (composition)
; dissolution
; eutrophication
; fen
; geoaccumulation
; groundwater pollution
; oxidation
; phosphorus
; porewater
; precipitation (chemistry)
; pyrite
; soil organic matter
; soil pollution
; sulfate
; water quality
; wetland
; Europe
英文摘要: Although in Europe atmospheric deposition of sulphur has decreased considerably over the last decades, groundwater pollution by sulphate may still continue due to pyrite oxidation in the soil as a result of excessive fertilisation. Inflowing groundwater rich in sulphate can change biogeochemical cycling in nutrient-poor wetland ecosystems. Incoming sulphate loads may induce internal eutrophication as well as the accumulation of dissolved sulphide, which is phytotoxic. We, however, argue that upwelling sulphate rich groundwater may also promote the conservation of rare and threatened alkaline fens, since excessive fertilisation and pyrite oxidation also produces acidity, which invokes calcite dissolution, and increased alkalinity and hardness (Ca2+ + Mg2+) of the inflowing groundwater. Our observations in a very species-rich wetland nature reserve show that sulphate is reduced and effectively precipitates as iron sulphides when this calcareous and sulphate rich groundwater flows upward through the organic soil of the investigated nature reserve. Furthermore, we show that sulphate reduction coincides with an increase in alkalinity production, which in our case results in active calcite precipitation in the soil. In spite of the occurring sulphate reduction we found no evidence for internal eutrophication. Extremely low phosphorous concentration in the pore water could be attributed to a high C:P ratio of soil organic matter and co-precipitation with calcite. Our study shows that seepage dependent alkaline fen ecosystems can be remarkably resilient to fertilisation and pyrite oxidation induced groundwater quality changes. © 2013 Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83701
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: KWR Watercycle Research Institute, Groningenhaven 7, 3433 PE Nieuwegein, Netherlands; Environmental Sciences, Soil Physics and Land Management group, Wageningen University, Droevendaalsesteeg 3a, Wageningen, 6708 PB, Netherlands; Department of Systems Ecology, VU University, De Boelelaan 1085, 1081 HV Amsterdam, Netherlands
Recommended Citation:
Cirkel D.G.,Van Beek C.G.E.M.,Witte J.P.M.,et al. Sulphate reduction and calcite precipitation in relation to internal eutrophication of groundwater fed alkaline fens[J]. Biogeochemistry,2014-01-01,117(2018-02-03)