Original paper

Phosphorus fractions and phosphorus sorption characteristics of freshwater sediments and their relationship to sediment composition

Borovec, Jakub; Hejzlar, Josef

Archiv für Hydrobiologie Volume 151 Number 4 (2001), p. 687 - 703

31 references

published: Jul 9, 2001

DOI: 10.1127/archiv-hydrobiol/151/2001/687

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Abstract

Phosphorus was fractionated within a set of sediments operationally divided into acidic, neutral, and alkaline groups. Relationships among fractional distribution of P, concentrations of sediment components important for P-sorption (Fe, Al, organic carbon (OC)), and P-sorption parameters were analyzed using a redundancy analysis method. The NaOH25-P fraction prevailed within the group of acidic sediments from forest lakes. NaOH25-P followed by BD-P and HCl-P was the largest fraction in the neutral and alkaline sediment groups. Fe and Al were found to be positively correlated with P in the BD and HCl fractions, respectively. A combination of Fe, Al, and OC was positively correlated with P in the NaOH25 fraction. Maximum sediment P-sorption capacity was the only sorption parameter correlated with P-fractionation; Al and OC in the NaOH25 fraction were the most significant explanatory constituents. None of the other sorption parameters (initially adsorbed P, adsorption/desorption equilibrium concentration) were correlated with the results of fractionation analysis.

Keywords

Nutrients in aquatic systems • sorption/desorption of phosphorus • NaOH25-P fraction