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Phosphorus in sediment

The coefficient of variation obtained for the determination of total phosphorus in sediment at the 1400ppm level was 2.5%. Some 98-100% recovery of inorganic phosphate was obtained in spiking experiments carried out on sediments. [Pg.336]

Muhlhauser et al. [51] have discussed methods for the determination of acid hydrolysable phosphorus in sediments. [Pg.337]

Comparative studies of different methods for determination of total phosphorus in sediment have been made by various workers [80-82, 86-88]. [Pg.339]

Dobolyi and Bidlo [76] have described methods for the determination of phosphorus in lake sediments. Shulka et al. [75] investigated the interference by arsenic in the perchloric acid digestion procedure of Murphy and Riley [85] for the determination of phosphorus in sediments. Arsenite concentrations up to 20pg did not interfere but arsenate interfered. Between 1 and 45 pg arsenic g"1 was extracted from a lake sediment and in all cases the error in the determination of phosphorus due to the presence of arsenic was less than 1%. [Pg.339]

Berner, R.A., and Rao, J. (1994) Phosphorus in sediments of the Amazon River and estuary implications for the global flux of phosphorus to the sea. Geochim. Cosmochim. Acta 38, 2333-2339. [Pg.545]

Gachter, R., and Meyer, J.S. (1993) The role of microorganisms in mobilization and fixation of phosphorus in sediments. Hydrobiologia 253, 103-121. [Pg.583]

Berner R. A. (1990) Diagenesis of phosphorus in sediments from non-upwelling areas. In Phosphate Deposits of the World Vol. 3 Neogene to Modem Phosphorites. International Geological Correlation Project 156 Phosphorites (eds. W. C. Burnett and S. R. Riggs). Cambridge University Press, Cambridge, pp. 27-32. [Pg.4495]

Phosphorus in sediments can be divided into several different fractions according to chemical separation methods. Williams et al. (1976) outlined a scheme of three fractions apatite-P, organic P, and... [Pg.170]

Vairavamurthy A (1999) Speciation of phosphorus in sediments and humic materials as revealed by phosphorus -edge XANES spectroscopy. NSLS Users Report. [Pg.557]

Figure 7 Average accumulation of phosphorus in sediments through the Cenozoic (Follmi, 1995). Timescale as Figure 1. Figure 7 Average accumulation of phosphorus in sediments through the Cenozoic (Follmi, 1995). Timescale as Figure 1.
Increased erosion due to forest clear-cutting and widespread cultivation has increased riverine suspended matter concentrations, and thus increased the riverine particulate phosphorus flux. Dams, in contrast, decrease sediment loads in rivers and therefore diminish phosphorus-flux to the oceans. However, increased erosion below dams and diagenetic mobilization of phosphorus in sediments trapped behind dams moderates this effect. The overall effect has been a 50-300% increase in riverine phosphorus flux to the oceans above pre-agricultural levels. [Pg.572]

The forms of phosphorus in sediments and soils can be operationally defined by chemical extraction schemes. The major inorganic phosphorus components are considered to comprise those (i) adsorbed by exchange sites (ii) associated with iron, aluminium and manganese oxides (iii) associated with carbonate (iv) associated with calcium as apatite or (v) bound in a crystalline mineral form (e.g. silicates). The organic phosphorus fraction, on the other hand, is either considered as a whole, or operationally divided... [Pg.2]

Gel filtration chromatography has been widely used to separate high and low molecular mass phosphorus in sediments, soil solutions, and preconcentrated surface water. Steward and Tate (1971) showed, for example, that Sephadex G50 could be used to separate high molecular mass phosphorus that corresponded with the molecular weight of myo-inositol hexakisphosphate. Others used Sephadex gel filtration separations to demonstrate the presence and importance of inositol phosphates in preconcentrated lake water (Eisenreich and Armstrong, 1977), algal cultures (Minear, 1972),... [Pg.9]

Li RS, Yang H (2004) Adsorption and release of phosphorus in sediments of the Changjiang Estuary. Mar Environ Sci 23(3) 39-42 (in Chinese with English abstract)... [Pg.130]

Song JM (2000b) Transferable phosphorus in sediments of the Huanghe River Estuary adjacent waters. Mar Sci 24(7) 42-45 (in Chinese with English abstract) Song JM (2000c) Marine Chemistry in China. China Ocean Press, Beijing, pp.l-210 (in Chinese)... [Pg.133]

Edlund G, Carman R (2001) Distribution and diagenesis of organic and inorganic phosphorus in sediment of the Baltic proper. Chemosphere 45(6-7) 1053-1061 El-Azim HA, El-Moselhy KM (2004) Determination and partitioning of metals in sediments along the Suez Canal by sequential extraction. J Mar Syst 56(3-4) 363-374... [Pg.419]

Selective Extraction Techniques for Phosphorus in Sediments and Soiis... [Pg.3715]

See other pages where Phosphorus in sediment is mentioned: [Pg.334]    [Pg.4453]    [Pg.4504]    [Pg.97]    [Pg.165]    [Pg.375]    [Pg.2]    [Pg.12]    [Pg.16]    [Pg.315]    [Pg.316]    [Pg.99]    [Pg.100]    [Pg.200]    [Pg.336]    [Pg.371]    [Pg.381]    [Pg.138]   
See also in sourсe #XX -- [ Pg.1285 , Pg.1294 , Pg.1295 ]



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