Forms of Phosphorus in the Surficial Sediments of Lake Erie

Abstract

The phosphorus in 48 surficial Lake Erie sediment samples was present in three major forms: phosphorus associated with apatite, nonapatite inorganic phosphorus (NAIP), and organic phosphorus. The apatite was of natural, detrital origin. It existed as particles ranging from fine sand to clay in size but mostly as silt-sized particles and was concentrated in nearshore sediments. Both NAIP and organic phosphorus was concentrated in fine-grained sediments accumulating in offshore depositional areas. NAIP was associated with amorphous hydrated ferric oxide in the oxidized microzone but was present as vivianite (Fe3(PO4)2∙8H2O) and possibly other forms also in the reduced zone. The organic phosphorus content of the sediment was closely related to organic carbon content. The phyllosilicate, organic matter, and reactive iron and manganese components of the sediments existed in intimate association.

The effect of the Mt. Mazama ashfall on the planktonic diatom community of Lake Washington1

“…Sedimentary phosphorus was measured by methods reported by Williams et al (1976). Silicon and phosphorus in lake water were measured by standardprocedures (Am.…”

Evaluation of phosphorus bioavailability in sediments of three contrasting lakes in China and the UK

“…Early schemes (Chang and Jackson, 1957) partitioned soil phosphorus into labile P, aluminium-bound P, iron-bound P, calcium-bound P, reductant soluble P, occluded P and organic P using various chemical extractants. Later work modi®ed the procedure (Williams et al, 1967) and applied the scheme to fractionation of phosphorus in lake sediments (Williams et al, 1971(Williams et al, , 1976. With the enrichment of phosphorus in lake sediments, forms of phosphorus in lake sediments have been increasingly investigated and its potential bioavailability has met with growing interest.…”

Phosphorus: Chemism and Interactions

“…Among numerous extraction schemes used, the procedures widely adopted are those developed by Williams (1976), Hieltjes & Lijklem (1980), Rutenberg (1992) and Galterman (1993). Together with the cited procedures, in the literature can be found other sequential schemes (Delaney, et al, 1997;Kleberg et al, 2000).…”

“…This fraction generally represents the phosphorus in apatite (Williams et al, 1976;William et al, 1980) and phosphorus bound to Ca (Golterman, 1996(Golterman, , 1982 and was extracted in step 2 (Tab. 3).…”