High Spatial and Fast Changes of Iron Redox State and Phosphorus Solubility in a Seasonally Flooded Temperate Wetland Soil

详细信息    查看全文

• 作者：Michael Prem ; Hans Christian Bruun Hansen ; Walter Wenzel ; Lisa Heiberg…
• 关键词：Iron oxides ; Phosphate sorption ; Eutrophication ; Reductive dissolution ; Water pollution
• 刊名：Wetlands
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：35
• 期：2
• 页码：237-246
• 全文大小：1,129 KB
• 参考文献：1. Aldous, A, McCormick, P, Ferguson, C, Graham, S, Craft, C (2005) Hydrologic regime controls soil phosphorus fluxes in restoration and undisturbed wetlands. Restor Ecol 13: pp. 341-347 CrossRef
  2. Borggaard, OK, Szilas, C, Gimsing, AL, Rasmussen, LH (2004) Estimation of soil phosphate adsorption capacity by means of a pedotransfer function. Geoderma 118: pp. 55-61 CrossRef
  3. Christensen, JH, Christensen, OB (2003) Severe summertime flooding in Europe. Nature 421: pp. 805-806 CrossRef
  4. R Core Team (2014). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. Available at http://www.R-project.org/
  5. Courtwright, J, Findlay, SEG (2011) Effects of microtopography on hydrology, physicochemistry, and vegetation in a tidal swamp of the Hudson River. Wetlands 31: pp. 239-249 CrossRef
  6. European Union (2000) European Union Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 establishing a framework for Community action in the field of water policy. Off J Eur Commun L327
  7. Fakih, M, Davranche, M, Dia, A, Nowack, B, Petitjean, P, Chatellier, X, Gruau, G (2008) A new tool for in situ monitoring of Fe-mobilization in soils. Appl Geochem 23: pp. 3372-3383 CrossRef
  8. Gao, S, Tanji, KK, Scardaci, SC, Chow, AT (2002) Comparison of redox indicators in a paddy soil during rice-growing season. Soil Sci Soc Am J 66: pp. 805-817 CrossRef
  9. Grybos, M, Davranche, M, Gruau, G, Petitjean, P (2007) Is trace metal release in wetland soils controlled by organic matter mobility or Fe-oxyhydroxides reduction?. J Colloid Interface Sci 314: pp. 490-501 CrossRef
  10. Heiberg, L, Pedersen, TV, Jensen, HS, Kjaergaard, C, Hansen, HCB (2010) A comparative study of phosphate sorption in lowland soils under oxic and anoxic conditions. J Environ Qual 39: pp. 734-743 CrossRef
  11. Heiberg, L, Koch, CB, Kjaergaard, C, Jensen, HS, Hansen, HCB (2012) Vivianite precipitation and phosphate sorption following iron reduction in anoxic soils. J Environ Qual 41: pp. 938-949 CrossRef
  12. Heron, G, Crouzet, C, Bourg, ACM, Christensen, TH (1994) Speciation of Fe(II) and Fe(III) in contaminated aquifer sediments using chemical extraction techniques. Environ Sci Technol 28: pp. 1698-1705 CrossRef
  13. Hoffmann, CC, Kjaergaard, C, Uusi-K?mpp?, J, Hansen, HCB, Kronvang, B (2009) Phosphorus retention in riparian buffers: review of their efficiency. J Environ Qual 38: pp. 1942-1955 CrossRef
  14. Hoffmann, CC, Kronvang, B, Audet, J (2011) Evaluation of nutrient retention in four restored Danish riparian wetlands. Hydrobiologia 674: pp. 5-24 CrossRef
  World reference base for soil resources 2006, first update 2007. FAO, Rome
  15. Kjaergaard, C, Heiberg, L, Jensen, HS, Hansen, HCB (2012) Phosphorus mobilization in rewetted peat and sand at variable flow rate and redox regimes. Geoderma 173-74: pp. 311-321 CrossRef
  16. Kronvang, B, Hoffmann, CC, Dr?ge, R (2009) Sediment deposition and net phosphorus retention in a hydraulically restored lowland river floodplain in Denmark: combining field and laboratory experiments. Mar Freshw Res 60: pp. 638-646 CrossRef
  17. Loeb, R, Lamers,
• 刊物主题：Freshwater & Marine Ecology; Environmental Management; Ecology; Hydrogeology; Coastal Sciences; Landscape Ecology;
• 出版者：Springer Netherlands
• ISSN：1943-6246

文摘

Wetland soils may act as sinks for phosphorus from agricultural soils but P sorption is sensitive to soil redox conditions. When soils become flooded and anoxic, FeIII is reduced and P sorption decreases. To get improved knowledge about the relationship between redox state and P solubility under field conditions, a grid of 4?×- sampling points laid out in an Fe-rich meadow soil bordering a Danish river were monitored during 11?weeks in the spring comprising in total five sampling dates. The redox state was quantified as the degree of Fe reduction (DRFe), i.e. percentage of soluble plus sorbed FeII to total pedogenic, non-silicate Fe. Average DRFe was highest (76?%) at beginning of April and decreased to 36?% within 9?weeks. The temporal and spatial variation of DRFe and the soil solution concentrations of Fe and P were high. Thus, average P in solution (Psol) ranged from 24 to 4?μM, closely correlated with average DRFe (R 2--.83). Soils farthest away from the river drained first and hence exhibited the biggest change in DRFe and Psol over time. The study demonstrates the great spatial and temporal variability of redox state and P solubility in such wetlands. Some likely consequences of redox oscillations are indicated.