Kinetics of Phosphorus Release in Soils with Different Textures in Intensive Cultivation Systems

Release kinetics of phosphorus in 17 sediments samples collected from Baihua Lake were determined, and the relationship between the phosphorus release kinetic parameters and the sediment composition was also investigated. The results showed that both the Elovich equation and power function equation were valid models for describing the phosphorus release data in the 17 sediments. Within the beginning 12 h, the rate of phosphorus release was high, and then decreased. Our correlation analysis demonstrates that there were no significant correlations between the maximum capacity of phosphorus release (Qmax) and the content of total nitrogen (TN), organic matter (OM), calcium-bound phosphorus (Ca-P), and organic phosphorus (OP). But the correlation between Qmax and iron/aluminum-bound phosphorus (Fe/Al-P) content was positive (R2 = 0.6064, P < 0.01), suggesting that Fe/Al-P might be the main contributor to the released phosphorus in the sediments.

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Characteristics and Kinetics of Phosphorus Release from Formulated Fertilizer in Clay Loam Soil

KIMIKA ◽

10.26534/kimika.v30i2.1-4 ◽

2019 ◽

Vol 30 (2) ◽

pp. 1-4

Author(s):

Vernadette J. Soriano ◽

Veronica P. Migo ◽

Monet Concepcion Maguyon-Detras ◽

Catalino G. Alfafara

Keyword(s):

Light Scattering ◽

Kinetic Model ◽

Dynamic Light Scattering ◽

Release Kinetics ◽

Phosphorus Release ◽

Particle Dynamic ◽

Clay Loam ◽

Clay Loam Soil ◽

Loam Soil ◽

Kinetics Of

A kinetic study for the phosphorus release of a formulated CaHAP-Z fertilizer was done to observe its behavior when applied to clay loam soil. The study of release kinetics of CaHAP-Z was done along with CaHAP and the control fertilizer Solophos™ to determine whether the formulated fertilizer can be an alternative for the conventional fertilizer. Results showed that the formulated fertilizer CAHAP-Z contains 3.73% phosphorus with 513.10 nm particle (Dynamic Light Scattering) indicating that the formulated fertilizer can be classified as a nanofertilizer. The formulated CaHAP-Z fertilizer showed the slowest release kinetics compared to the controls. In addition, this study showed that the simple Elovich kinetic model is the general equation that best fits to describe the phosphorus release of fertilizers.

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Kinetics of phosphorus release from sediments and its relationship with iron speciation influenced by the mussel (Corbicula fluminea) bioturbation

The Science of The Total Environment ◽

10.1016/j.scitotenv.2015.10.155 ◽

2016 ◽

Vol 542 ◽

pp. 833-840 ◽

Cited By ~ 41

Author(s):

Musong Chen ◽

Shiming Ding ◽

Ling Liu ◽

Di Xu ◽

Mengdan Gong ◽

...

Keyword(s):

Corbicula Fluminea ◽

Phosphorus Release ◽

Iron Speciation ◽

Kinetics Of

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Effect of Sodium and Magnesium on Kinetics of Phosphorus Release in Some Calcareous Soils of Western Iran

Soil and Sediment Contamination An International Journal ◽

10.1080/15320383.2011.571315 ◽

2011 ◽

Vol 20 (4) ◽

pp. 411-431 ◽

Cited By ~ 3

Author(s):

Zahra Varasteh Khanlari ◽

Mohsen Jalali

Keyword(s):

Calcareous Soils ◽

Phosphorus Release ◽

Western Iran ◽

Kinetics Of

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Study of the Chemical Interactions Between Iron Phosphides and Iron Silicides

Eurasian Chemico-Technological Journal ◽

10.18321/ectj195 ◽

2014 ◽

Vol 17 (1) ◽

pp. 67

Author(s):

G.M. Serzhanov ◽

V.M. Shevko ◽

B.A. Lavrov

Keyword(s):

Energy Minimization ◽

Phosphorus Release ◽

Iron Silicides ◽

Yellow Phosphorus ◽

Metallurgical Company ◽

Iron Phosphides ◽

Lower Temperature ◽

Phosphorus Production ◽

Kinetic Mode ◽

Kinetics Of

This article contains the research results of the thermodynamic modeling of interaction of iron phosphides Fe2P and FeP with FeSi2, obtained by a method of the total thermodynamic analysis on the basis of the program HSC-5.1 of the Finnish metallurgical company Outokumpu, developed on both a principle of the Gibbs energy minimization, and also kinetics of the phosphorus release by ferrosilicon from the electrothermal ferrophosphorus – a by-product of the yellow phosphorus production. It was found, that temperature of the beginning of the phosphorus formation in systems iron phosphides – FeSi2 depends on a mole ratio of phosphorus in the phosphides. At the increasing this ratio from 33.3 to 50%, the temperature of the beginning of the phosphorus formation decreases from 1362 K to 1290 K. At lower temperature (773 K) there is the formation of intermediate FeP2 and FeP in a system Fe2P-FeSi2 and intermediate FeP2 in a system FeP-FeSi2, which react with FeSi2 with temperature increasing and form a gaseous phosphorus. The process proceeds in kinetic mode and is characterized by apparent activation energy of 281-389 kJ/mol.

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