Nitrogen-phosphate Fertilizers Based on Activation of Phosphorite Powder with Partially Ammoniated Mix of Phosphoric and Sulphuric Acids

Rasulov, A. A.; Namazov, Sh. S.; Sultonov, B. E.

doi:10.9734/csji/2020/v29i930201

Cited by 2 publications

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“…Indeed, the fertilizers used are responsible for this contribution. The work has shown that nitrogenphosphate based fertilizers can contain up to 83.3 mg Zn/Kg of fertilizer (Rasulov et al, 2020).…”

Section: Concentrations Of Trace Metalsmentioning

confidence: 99%

The Study of Peri-Urban Soil Contamination in the Kenitra Region, Morocco – Characterization and Assessment Using a Statistical Approach

El Idrissi,

Mabrouki,

Baghdad

et al. 2024

Ecol. Eng. Environ. Technol.

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The peri-urban solid waste in the Kenitra region is experiencing a significant change in terms of quantity and quality. High concentrations of both inorganic and organic materials are present in these wastes, posing a significant threat of pollution. This research sought to analyze the extent of soil contamination by heavy metals, providing valuable insights to prompt proactive interventions and propose alternative solutions for sustainable waste management. The objective of this work was to study peri-urban soil contamination in the Kenitra region-Morocco. For that purpose, several soil contamination indicators were analyzed, namely: nitrogenous, fertilizer and heavy metals concentration, soil pH, etc. The analyzed soil samples were taken from water from the different points at the levels of the studied region. The analysis shows that the studied soils are polluted with Zn, Mg, Cu, Ni, Cr, Cd, Pb, and other chemical elements. The results obtained suggest a correlation between soil pollution and the concentrations of the measured heavy metals. Furthermore, the analysis shows that heavy metals, contamination is particularly related to the presence of lead, cadmium, and zinc. The zinc contamination in the soil is about 390 mg/kg for a standard of between 0.2 and 2 mg/kg. Lead concentrations are 53 mg/kg for a standard of 0.3 mg/kg. On the basis of Moroccan standards, the soil is contaminated by lead, cadmium, and zinc.

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Section: Concentrations Of Trace Metalsmentioning

confidence: 99%

The Study of Peri-Urban Soil Contamination in the Kenitra Region, Morocco – Characterization and Assessment Using a Statistical Approach

El Idrissi,

Mabrouki,

Baghdad

et al. 2024

Ecol. Eng. Environ. Technol.

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“…It has been established that an increase in the weight fraction of phosphate raw materials from 5 to 30 g in relation to 100 g of EPA leads to a decrease in its decomposition coefficient (C dec ) from 72.32 to 26.90; from 89. 14 CaO : P 2 O 5 = 3.0). The first raw material is processed into nitrocalcium phosphate fertilizer (NCPF -6 % N; 16 % P 2 O 5 ) at JSC "Samarqandkimyo", the second was obtained according to the method described in [7], which was subjected to chemical enrichment, that is, 52 % nitric acid to dissolve and remove calcite in the form of calcium nitrate.…”

Section: Introductionmentioning

confidence: 96%

Processing of a Washed Dry Concentrate Containing 26% P2o5 Into Ammophosphate, Sulpho- And Nitroammophosphate Fertilizers

Rasulov,

Namazov,

Seytnazarov

et al. 2024

JCTM

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The process of obtaining ammophosphate by means of phosphoric acid decomposition of washed dried concentrate (WDC) with 26 % Р2О5 and 10 % СО) - raw material for the production of thermally fired concentrate, has been studied. The extraction phosphoric acid contains (mass. %): 16.46 P2O5, 0.06 CaO, 1.11 MgO, 0.27 Fe2O3, 0.41 Al2O3, 2.98 SO3 and 0.99 F. The mass ratio of WPPA: WDC ranged from 100: 10 to 100: 30. Then acidic phosphate pulps (at 65°C) after 45 minutes were ammoniated to pH = 3.8, granulated and dried at 85 - 90°C. It has been shown that the nitrogen content in the finished product ranges from 4.92 - 7.11 %, total phosphorus (P2O 5t.) 41.48 - 46.44 %, phosphorus assimilated by plants (P2O5acceptable) 34.79 - 45.11 %, water-soluble phosphorus (P2O 5w.s.) 23.49 - 37.73 %. The addition of 5 - 7.5 % H2SO4 or HNO3 in the form of a monohydrate makes it possible to intensify the process of phosphoric acid decomposition of phosphate raw materials and to obtain sulfo- and nitroammophosphate with significantly highcontents of P2O5 acceptable and P2O5 w.s.. So, with a weight fraction of WDC equals to 30 and weight fractions of H2SO4 - 5 and 7.5, there have been 37.6 and 34.47 % P2O5 total in sulfoammophosphate; 24.11 and 22.06 % CaO t. , 88.75 and 96.4 % P2O5 acceptable: P2O5t., 77.39 and 79.54 % P2O5 w.s. : P2O5t., 6.03 and 7.08 % nitrogen, respectively. In the case of using HNO3, nitroammophosphate contains the largest amount of nitrogen due to additionally introduced nitric acid, but the phosphate raw material has a relatively low decomposition coefficient. The strength of granules of all brands of fertilizers averages 3.50 MPa and are quite suitable for bulk storage and transportation. Material balances for the production of ammophosphate, sulfoammophosphate and nitroammophosphate have been calculated.

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Nitrogen-phosphate Fertilizers Based on Activation of Phosphorite Powder with Partially Ammoniated Mix of Phosphoric and Sulphuric Acids

Cited by 2 publications

References 0 publications

The Study of Peri-Urban Soil Contamination in the Kenitra Region, Morocco – Characterization and Assessment Using a Statistical Approach

The Study of Peri-Urban Soil Contamination in the Kenitra Region, Morocco – Characterization and Assessment Using a Statistical Approach

Processing of a Washed Dry Concentrate Containing 26% P2o5 Into Ammophosphate, Sulpho- And Nitroammophosphate Fertilizers

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