12 Phosphogypsum: Properties and Potential Use in Agriculture 231 • Discuss the uses of phosphogypsum in agriculture as a fertilizer, amendment to degraded soils, and as an additive fertilizer industry. • Define the PG impacts on crop production, soil, water, and environment. 2 Phosphogypsum Generation and Storage Processes ...
The use of heat treatment can remove all impurities by subjecting the phosphogypsum to a temperature between 130 and 150 °C [125]. However, soluble phosphates are difficult to remove, and for this reason they affect the setting time and the level of strength of the cement [ 126 ].
Phosphogypsum (PG) is a by-product of phosphate fertilizer production that contains radioactive and hazardous elements. This review evaluates the geochemical …
The use of phosphogypsum in a dose of 1.5 t/ha contributed to the significant accumulation of organic carbon in the topsoil of the studied sod-podzolic soils – in comparison with the...
This study contributes to sustainable construction practices by exploring the use of phosphogypsum, a commonly discarded byproduct, in the production of recycled aggregates. Addressing both environmental and economic aspects of sustainability, we investigate the feasibility of employing phosphogypsum as a primary raw material, in …
The U.S. EPA prohibits the use of phosphogypsum because of the radioactivity. An exception is made for phosphogypsum with an average concentration of less than 10 pCi/g radium which can be used as an agricultural amendment, but for no other use. Phosphogypsum in north Florida has 10 pCi/g radium.
If you want to use phosphogypsum to partially replace cement, 10 % is the best percentage to use. 3. Even the flexural strength of the concrete can be enhanced by as much as 10 % with a single blast. Flexural strength also tends to diminish with increases of greater than 10 %. 4.
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 tons of PG is produced per ton of phosphoric acid production, where worldwide PG generation exceeds 300 million tons annually. The vast majority of produced PG is discarded …
Previous studies have utilized the PHREEQC model to understand the behavior of radionuclides in coastal Brazil 11,12, geochemistry in Mexico 13, and radionuclide transport in Germany 14.
phosphogypsum into the nonallowable category and therefore made phosphogypsum illegal for agricultural use (U.S. Gypsum Company 1990). Since then the U.S. Environmental Protection Agency (Federal Register 6/3/92) has permitted the controlled use of phosphogypsum in agriculture if radium-226 levels are <10 pCi g-1. This …
Phosphogypsum (PG) is the primary byproduct generated during the production of phosphoric acid, an intermediate product in phosphate fertilizer production, from calcium phosphate (apatite) ore. PG also exists in very small amounts in nature where it is the result of natural guano processes as they took for instance place in the …
Phosphogypsum (PG) is a solid waste produced from decomposition of phosphate rock in sulfuric acid. It can improve the physicochemical properties of soil. However, the application of PG will ...
Gulf of Mexico Science 16 (1). Phosphogypsum (PG), a solid by-product of phosphoric acid production in the fertilizer industry, contains radionuclides and trace …
Phosphogypsum utilization has evolved along three broad use groupings: (1) Chemical raw material (2) Agricultural applications (3) Construction materials. Each of these uses will be considered in more detail, but it should be pointed out that for years Florida has not been in the forefront of the efforts to utilize phosphogypsum.
Phosphogypsum (PG) waste is a by-product generated from wet-process phosphoric acid (H3PO4) manufacturing during phosphate rock decomposition. Worldwide, the annual production of PG ranges between 100 and 300 million tons, with only a few quantities utilized in several application domains (about 15%), the unused PG is usually …
Phosphogypsum (PG) is a by-product of phosphoric acid production from phosphate rocks, containing radioactive elements and impurities. This review examines …
The issue has drawn attention, at least in part, because phosphogypsum includes radioactive elements. It is stored in huge stacks. Opposition to phosphogypsum in roads. Opponents raised questions about the potential hazards of using phosphogypsum, including whether it could harm people working on roads and …
DOI: 10.1002/tqem.21707 Corpus ID: 225159492; Efficiency of the use of neutralized phosphogypsum, phosphorite processing waste, in agriculture @article{Efremova2020EfficiencyOT, title={Efficiency of the use of neutralized phosphogypsum, phosphorite processing waste, in agriculture}, author={Saniya Y. …
Preliminary Evaluation of the Use of Phosphogypsum for Reef Substrate. Ii. ... Thirty-three such stockpiles, totaling millions of tons of PG, are currently extant in the Gulf of Mexico region. The ...
It is estimated only 15% of the phosphogypsum is used for secondary commercial purposes and the common applications can include its use in cement production, building materials (e.g., bricks and ...
Phosphogypsum (PG ), a solid by-product of phosphoric acid production in the fertilizer industry, contains radionuclides and trace metals in concentrations which are potentially …
The phosphogypsum valorization became a necessity when the U.S. Environmental Protection Agency (EPA) legislation was modified in 1992 and allowed the use of PG with an average 226 Ra of less than 370 Bq/kg for agricultural applications such as a soil amendment. Other areas in the world, however, looked at PG as a valuable raw …
The present work aims to contribute to finding more recycling routes for phosphogypsum (PG) and its potential uptake in the material construction industry as paving blocks. Laboratory testing was conducted to formulate mixes using PG as fine sand replacement. An optimal 20% substitution rate was proved. Industrially processed …
The paper presents the results of the application of raw phosphogypsum as an adsorbent for the preliminary treatment of coke-chemical wastewater with an initial concentration of phenol 395 mg/L. Studies in batch mode have proved that phenol removal is promoted by increasing the adsorbent dose and effluent temperature, the optimal …
Phosphogypsum stack in West-Central Florida. By Seán Kinane/WMNF News (2010). The House on Wednesday passed a bill that would clear the way for demonstration projects about using phosphogypsum, a byproduct of the phosphate industry, in building roads.. House members voted 81-25 to approve the bill (HB 1191), …
Phosphogypsum (PG), a solid by-product of phosphoric acid production, contains radionuclides and trace metals in concentrations which may pose a potential hazard to human health and the ...
Phosphogypsum (PG) is a by-product of the phosphate fertilizer industry that is produced during the phosphoric acid production process. Annual global PG production ranges between 100 to 300 Mt, with only 15% of that utilized while the rest is usually placed on large dumps with potential serious human and environmental impacts.
The EPA has long banned the use of phosphogypsum, the waste left behind from mining phosphate rock., saying it contains "radioactive material." The EPA has long banned the use of phosphogypsum ...
Background: Alkaline soils with high calcium carbonate and low organic matter are deficient in plant nutrient availability. Use of organic and bio-fertilizers has been suggested to improve their properties. Therefore, a greenhouse experiment was conducted to evaluate the integrative role of phosphogypsum (PG; added at 0.0, 10, 30, and 50 g PG kg-1), …