Articles | Volume 18, issue 11
https://doi.org/10.5194/hess-18-4687-2014
https://doi.org/10.5194/hess-18-4687-2014
Research article
 | 
27 Nov 2014
Research article |  | 27 Nov 2014

Iron oxidation kinetics and phosphate immobilization along the flow-path from groundwater into surface water

B. van der Grift, J. C. Rozemeijer, J. Griffioen, and Y. van der Velde

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Short summary
Exfiltration of anoxic groundwater containing Fe(II) to surface water is an important mechanism controlling P speciation in the lowland catchments. Due to changes in pH and temperature, the Fe(II) oxidation rates were much lower in winter than in summer. This study also shows a fast transformation of dissolved P to structural P during the initial stage of the Fe oxidation process resulting in low dissolved P concentrations in the surface water throughout the year.