Articles | Volume 14, issue 14
https://doi.org/10.5194/bg-14-3585-2017
https://doi.org/10.5194/bg-14-3585-2017
Research article
 | 
27 Jul 2017
Research article |  | 27 Jul 2017

Sediment phosphorus speciation and mobility under dynamic redox conditions

Chris T. Parsons, Fereidoun Rezanezhad, David W. O'Connell, and Philippe Van Cappellen

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Latest update: 08 Oct 2025
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Short summary
Phosphorus (P) has accumulated in sediments due to past human activities. The re-release of this P to water contributes to the growth of harmful algal blooms. Our research improves our mechanistic understanding of how P is partitioned between different chemical forms and between sediment and water under dynamic conditions. We demonstrate that P trapped within iron minerals may be less mobile during anoxic conditions than previously thought due to reversible changes to P forms within sediment.
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