Phosphorus Partition Ratio

Key words phosphorus partition ratio, duplex converter processing, sihcon, Basicity... 

As shown in Figure 4, the variation of the phosphorus partition ratio with basicity (mass% CaO/mass % Si02), at 1643 K, for FeO concentration at 20 mass %. The Lp increased with increasing basicity (1.5 2.1), which was in contradiction with that reported by Somnath Basu et al. [10]. The phosphorus was oxidized by FeO in slag to... 

Figure 5. Variation of the phosphorus partition ratio with different FeO content...

When compound (VII) was heated to 130° for 2-5 hr. it isomerized to OO -diethyl S-ethylmercaptoethyl phosphoro-thiolate (VIII). This was shown by successive partitioning of the heated product between suitable solvents, the partition ratios of the radioactive phosphorus being determined after each extraction. If only one compound is present all the ratios would be the same if two or more compounds are present, the observed over-all partition ratios would change in systematic fashion. 

Equations 17—20 result from contact between hot metal and slag, and the sulfur and carbon come dissolved in the hot metal. Likewise, the manganese, silicon, and phosphorus which are produced are dissolved into the hot metal. The heats of solution for these elements in some cases depend on concentration, and are not included in the heats of reaction listed above. The ratio of the concentration of the oxide (or element for sulfur) in the slag to the concentration of the element in the hot metal is the partition ratio, and is primarily a function of slag chemistry and temperature. 

Where (%P) and [%P] stood for the mass percent of phosphorus in slag and semi-steel, respectively. Because dephosphorization did not reach equftibrium and the Lp was the apparent partition ratio of the reaction. 

Figure 38.8 Effects of P04 scavenging on cellular partitioning of P and N P ratios in eight natural estuarine bloom samples of prokaryotic and eukaryotic algae. (A) Fractions of total cell-associated P in the intracellular (filled bars) and surface-adsorbed (open bars) pools (B) Nitrogen to phosphorus (N P) ratios calculated using total cellular P (filled bars) and intracellular P pools after removal of surface-adsorbed P with the oxalate reagent (open bars). Error bars represent the standard deviations of triplicate samples, and the dashed lines indicate the Redfield ratio. Fu et al. (2005a), Limnology and Oceanography.

Quantity/intensity relationships are often used to describe soil capacity to buffer phosphorus concentration in soil pore water. The quantity (0 refers to the amount of phosphorus adsorbed on soil surface, whereas intensity (/) refers to the concentration of P in soil pore water. This ratio can also be viewed as partition coefficient (K ), as indicated by liner sorption isotherms. The ratio expressed as either QII or is influenced by various physicochemical properties of soils, including clay content, high concentration of Fe and Al oxides, CaCOj content, organic matter content, pH, and redox potential. 

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