Chemical and Microbial Binding Forms of Phosphorus Considering the Availability of Nitrate in Sediment‐Water Systems

Abstract

An analytical registration of P-transport processes in intact sediment cores from the shallow reservoir Radeburg I1 (near Dresden, Saxonia, Germany) was possible by application of KH232P04 and followed by sequential P-fractionation (PSENNER et al. 1984). Under oxygen free conditions and sufficient nitrate supply an activity accumulation was found in the uppermost sediment horizon. Nitrate influences above all the BD-fraction (reductant soluble P), so that an interaction between nitrate and the iron binding system could be proved. It could be shown by means of activated sludge (a model object for microbial polyphosphate accumulation from a lab plant qualified for biological P-and N-elimination) that added KH232P04 was bound within 5 h to about 75 % in the NaOH-fraction. The saturation of iron compounds in the activated sludge took place immediately after KH23*P04 had been added. In the same time the portion of the microbial immobilization of added 32P amounted to 7 % in the high-iron sediment from the Radeburg reservoir, whereas evidently in the heat-and HgCI2-sterilized sediments this portion was additionally ascertained in the BD-fraction, too,

Characterization of the bacterial population and chemistry in the bottom sediment of a laterally subdivided drinking water reservoir system

“…The remarkably low nitrate concentration in the deep hypolimnetic water of station E in February 2006 illustrates the high reductive power of the sediment at this point. The nitrate concentrations measured in 2005 in the upper 0.5 cm sediment layer of the main basin may point to the absence of a concurrent phosphate release from the sediment into the water body (Andrusch et al, 1992;Hupfer and Uhlmann, 1991;Maaßen et al, 2005). The low concentration or absence of nitrate in the sediment of all sampling points in 2006 could be explained by long winter stagnation (97 days) and an extremely short spring circulation (6 days).…”

Effects of nitrate on phosphorus release: comparison of two Berlin lakes

“…Usually, as long as the presence of nitrate keeps a sediment aerobic and enough aerobic sorption capacity is provided, P release is prevented or reduced [5][6][7][8]. A threshold value in the range of 1 mg L -1 NO 3 --N in stratified and 0.5 mg L -1 NO 3 --N in non stratified lakes was proposed to be sufficient to inhibit P release [9].…”

Planning and implementing forest operations to achieve sustainable forests: Proceedings of papers presented at the joint meeting of the Council on Forest Engineering and International Union of Forest Research Organizations.

“…Struwe and Kjoller retention in Viiratsi. Also, some investigations (1991) found up to 100 times higher denitrifying suggest that permanently high N concentration in activity in slurry incubations than in the black alder soil can cause P leaching (Andrusch et al 1992). On forest.…”