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Environmental Monitoring and Assessment

, Volume 169, Issue 1–4, pp 169–178 | Cite as

Sequential fractionation of phosphorus in sediments of El-Fayum lakes—Egypt

  • Amaal Mansour Abdel-Satar
  • Mohsen F. Sayed
Article

Abstract

The amounts and forms of potentially mobile phosphorus (P) in surface sediments of Qarun and Wadi El-Rayan lakes were evaluated during winter and summer using a sequential chemical extraction. Five sedimentary P fractions were separately quantified: loosely sorbed P (NH4Cl-P), iron-associated P (BD-P), calcium- bound P (HCl-P), metal oxide bound P (NaOH-P), and residual P (organic and refractory P). The results indicated that the fractional composition of the examined lakes was different while the total P concentrations were approached. The inorganic P in the surface sediment mainly consisted of Ca-P followed by Fe-P in Qarun Lake, while Al-P took the second order in Wadi El-Rayan lakes. The ranks order of the different P extracts were HCl-P > residual-P ≈ NaOH-P > NH4Cl-P > BD-P and residual-P > NH4Cl-P > HCl-P > NaOH-P > BD-P for Qarun and Wadi El-Rayan lakes, respectively.

Keywords

Lake sediment Phosphorus Sequential fractionation Qarun and Wadi El-Rayan lakes 

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.Inland Water and Aquaculture BranchNational Institute of Oceanography and Fisheries (NIOF)CairoEgypt

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