Use of partially acidulated phosphate rocks as phosphate fertilizers

1993 ◽  
Vol 35 (1-2) ◽  
pp. 47-59 ◽  
Author(s):  
S. S. S. Rajan ◽  
B. C. Marwaha
Keyword(s):  
Phosphate Rocks ◽  
Phosphate Fertilizers ◽  
Partially Acidulated Phosphate Rocks

Partially acidulated phosphate rocks: Phosphorus release characteristics

1990 ◽  
Vol 22 (2) ◽  
pp. 109-117 ◽  
Author(s):  
J. Hagin ◽  
S. S. S. Rajan ◽  
M. K. Boyes ◽  
M. Upsdell
Keyword(s):  
Phosphorus Release ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks

scholarly journals Uranium, thorium and potassium contents and radioactive equilibrium states of the uranium and thorium series nuclides in phosphate rocks and phosphate fertilizers.

RADIOISOTOPES ◽  
1985 ◽  
Vol 34 (10) ◽  
pp. 529-536 ◽  
Author(s):  
Kazuhisa KOMURA ◽  
Mikio YANAGISAWA ◽  
Jiro SAKURAI ◽  
Masanobu SAKANOUE
Keyword(s):  
Equilibrium States ◽  
Phosphate Rocks ◽  
Phosphate Fertilizers ◽  
Radioactive Equilibrium ◽  
Thorium Series

Comparison of Bray I and Pi tests for evaluating plant-available phosphorus from soils treated with different partially acidulated phosphate rocks

1989 ◽  
Vol 114 (2) ◽  
pp. 211-216 ◽  
Author(s):  
R. G. Menon ◽  
S. H. Chien ◽  
L. L. Hammond
Keyword(s):  
Available Phosphorus ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks

Determination of total arsenic and arsenic (III) in phosphate fertilizers and phosphate rocks by HG-AAS after multivariate optimization based on Box-Behnken design

Talanta ◽  
2009 ◽  
Vol 80 (2) ◽  
pp. 974-979 ◽  
Author(s):  
Samuel M. Macedo ◽  
Raildo M. de Jesus ◽  
Karina S. Garcia ◽  
Vanessa Hatje ◽  
Antonio F. de S. Queiroz ◽  
...  
Keyword(s):  
Total Arsenic ◽  
Phosphate Rocks ◽  
Multivariate Optimization ◽  
Phosphate Fertilizers ◽  
Box Behnken Design

Partially acidulated phosphate rocks made from phosphoric acid using direct acidulation-granulation techniques

1987 ◽  
Vol 12 (1) ◽  
pp. 85-98 ◽  
Author(s):  
A. C. Braithwaite ◽  
D. A. Rogers
Keyword(s):  
Phosphoric Acid ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks

Phosphate rocks and partially-acidulated phosphate rocks as controlled release P fertilizers

1993 ◽  
Vol 35 (1-2) ◽  
pp. 25-31 ◽  
Author(s):  
J. Hagin ◽  
R. Harrison
Keyword(s):  
Controlled Release ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks ◽  
P Fertilizers

Agronomy, modelling and economics of reactive phosphate rocks as slow-release phosphate fertilizers for grasslands

1993 ◽  
Vol 36 (3) ◽  
pp. 229-238 ◽  
Author(s):  
A. G. Sinclair ◽  
P. D. Johnstone ◽  
L. C. Smith ◽  
M. B. O'Connor ◽  
L. Nguyen
Keyword(s):  
Slow Release ◽  
Phosphate Rocks ◽  
Phosphate Fertilizers ◽  
Reactive Phosphate

scholarly journals Obtaining the partially acidulated phosphate rocks by means of intermediate-grade phosphate and diluted phosphoric acid: Influence of some parameters

2016 ◽  
Vol 18 (3) ◽  
pp. 39-43
Author(s):  
Abbes Mizane ◽  
Ahmed Boumerah ◽  
Noureddine Dadda ◽  
Rabah Rehamnia ◽  
Salah Belhait
Keyword(s):  
Phosphoric Acid ◽  
Reaction Times ◽  
Water Soluble ◽  
Particle Sizes ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks ◽  
Water Soluble P ◽  
Conversion Rates ◽  
Soluble P ◽  
Phosphoric Acid Concentration

Abstract In this work, some parameters during the partial acidulation by phosphoric acid of phosphate 53.75% BPL (bone phosphate of lime) having different particle sizes are determined. P2O5 recovery is obtained by performing a series of reactions using phosphoric acid diluted from 10 to 40 wt.% and with reaction times ranging from 10 to 50 minutes. The best conversion rates are obtained with the following reaction parameters: phosphates size: 88-177 μm, reaction time: 50 minutes and phosphoric acid concentration: 40 wt.%. In the second part, the water-soluble P2O5 of PAPRs (Partially Acidulated Phosphate Rocks) obtained with phosphoric acid 30% and 40 wt.% is measured. The results of experiments showed that the water-soluble P2O5 has reached 15.2% for PAPRs obtained by reacting phosphate 88 μm with phosphoric acid 40 wt%.

Partially acidulated phosphate rocks: Controlled release phosphorus fertilizers for more sustainable agriculture

1994 ◽  
Vol 37 (1) ◽  
pp. 69-78 ◽  
Author(s):  
S. S. S. Rajan ◽  
M. B. O'Connor ◽  
A. G. Sinclair
Keyword(s):  
Controlled Release ◽  
Sustainable Agriculture ◽  
Phosphate Rocks ◽  
Partially Acidulated Phosphate Rocks ◽  
Phosphorus Fertilizers
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