Untersuchungen über den Phosphathaushalt des Amazonas

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“…It has been suggested that sediments act as a buffer on the phosphate content of the water (Carritt and Goodgal 1954;Gessner 1960), and our observations support this. In addition to the data in Table 1, the results of several other experiments with shorter contact times, which were performed in other years, show that the sediments are in equilibrium with water having a phosphate content between 0.7 and 0.9 pmole/ liter.…”

“…Carritt and Goodgal ( 1954) Gessner (1960) added phosphate to suspensions of sediments similar to those in the Amazon River and found that the sediments would adsorb additional phosphate as the concentration in the water was increased. Gessner ( 1960) and Carritt and Goodgal ( 1954) suggested that sediments act as a buffer on the concentration of phosphate in the overlying water.…”

Temporal Relation between Soluble Reactive Phosphorus and Factors in Stream Water and Sediments in Hoxie Gorge Creek, New York

“…These studies showed that sediments rapidly sorbed added B a d indicated that sediments may regulate the dissolved P concentration, a conclusion based on the close agreement between streamwater dissolved P me% EPC, (Gessner 1960;Taylor and Kunishi 1971;Meyer 1979). In Hoxie Gorge Creek, soluble reactive phosphoms (SRP) increased downstream and was highly correlated @ < 0.01) with the EPC, of the sediments dong the downstream gradient (Klotz 1988).…”

“…Because P is a highly particle reactive element, it is not surprising that some lotie ecologists have concentrated on P interaetisns with sediments to determine what controls its rate 0% supply. They have found that phosphate is taken up by and released from particles though sa complex series of geochemical 6 '~o r p t i~n 9 ' reactions known as the phosphate buffer mechanism (Froelick 1988 the aquatic sciences because it has been linked to the maintenance of the phosphate concentration of rivers, streams, and estuaries at nearly constant values (Gessner 1960;Bornersy et al 1965;Taylor md Kunishi 1971;Meyer 1979;K1ot.z 1988). The mechanism provides for an often large md potentially available reservoir of P to replenish that removed from solution by aquatic organisms (Froelich B 988).…”

The chemistry of aquatic phosphate: inorganic processes in rivers

“…In these waters, phosphate concentrations are controlled through an interaction with suspended sediments as demonstrated by the constancy of dissolved phosphate levels when suspensions of river or estuarine sediments are diluted with distilled and/or sea water, (Stephens-en, 1949;Rochford, 1951;Carritt & Goodgal, 1954;Jitts, 1959;Gessner, 1960;Pomeroy etal., 1965;Burns and Solomon, 1969;Butler and Tibbits, 1972;Wormald and Stirling, 1979;Chase and Sayles, 1980;Fox et al, 1985Fox et al, , 1986. This control appears to be the result of binary exchange between phosphate and amorphous ferric hydroxide in suspension or as surface coatings on suspended sediments (Fox, 1989(Fox, , 1990(Fox, , 1991.…”