Hydrobiologia

, Volume 364, Issue 1, pp 99–104

Presence of and phosphate release from polyphosphates or phytate phosphate in lake sediments

  • Han Golterman
  • Joëlle Paing
  • Laura Serrano
  • Elena Gomez
Article

Abstract

NaOH is often used as an extractant for thefractionation of sediment-bound phosphates. Besidesorthophosphate, a certain quantity of phosphate whichis called ‘non-reactive NaOH-extractable phosphate’is also extracted. In recent literature it has beensuggested that this fraction consists of bacterialpolyphosphates and might be responsible for the phosphate release from aquatic sediments under anoxicconditions.

In a previous publication we have already shown thatNaOH is not an accurate extractant as both theconcentration of NaOH and the duration of theextraction have an influence on the quantity ofphosphate extracted, due to the hydrolysis of organicphosphates.

In this article we show that cold NaOH does not onlyextract iron-bound phosphate but phytate phosphate aswell. Non-reactive phosphate in this extract was notrelated to the presence of polyphosphate, but mainlyto phytate and humic phosphates. As it has been shownthat phytate may disappear from sediments when theybecome anoxic, we suggest that phytate mineralizationmay be an important mechanism for anoxic phosphaterelease from sediments.

sediments polyphosphates phytate-phosphate phosphate fractionation 

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Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Han Golterman
    • 1
  • Joëlle Paing
    • 3
  • Laura Serrano
    • 4
  • Elena Gomez
    • 3
  1. 1.Association ‘Leiden-Camargue’ArlesFrance
  2. 2.Mas dou BochiArlesFrance
  3. 3.Département Sciences de l‘Environnement, Faculté de PharmacieMontpellierFrance
  4. 4.Dept. de EcologíaUniversidad de SevillaSevillaSpain

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