Phosphogypsum Radioactive Element

The concentrations of 238U, 226Ra, 232Th and 40K maintained in phosphate rock (PR), phosphoric acid (PA) and phosphogypsum (PG) samples and its possible radiation hazards, have been measured. The radionuclides in phosphate rock have been redistributed unsymmetrically between phosphoric acid and phosphogypsum during the production process. …

The radioactive elements such as 237Np, 239Pu, 241Am, 99Tc, and 90Sr are soluble and contaminate groundwater, so ocean dumping and/or deep bored wells of radioactive waste containing these radioactive elements are not safe disposal methods. The reduced form of these radioactive elements is insoluble, immobilized, and gets precipitated.

Phosphogypsum (PG) is a solid by-product of the phosphate industry, rich in contaminants and produced in large quantities. Raw materials and stabilized specimens, consisting of bentonite-lime-PG mixtures, were characterized by mineralogical, microstructural, chemical, alpha-particle, and gamma-ray spectrometry analysis before hydration and after …

Usually, PG contains radioactive elements. The radioactivity of PG (in particular (α)) is due to the radium content resulting from the decomposition of uranium (present in the …

For the Russian Federation, an urgent issue is the search for new raw materials sources of rare earth elements (REE) [1, 2].Phosphogypsum, a large-tonnage product of apatite processing in the production of extraction phosphoric acid for mineral fertilizers, can serve as one of the promising sources of REE [3–7].In addition to rare earth elements, phosphogypsum …

Radioactive equilibrium and radionuclides fractionation in phosphogypsum. State of radioactive equilibrium is an excellent tool for studying radionuclides fractionation and their distribution in …

Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. The phosphate ore and the resulting phosphogypsum contain radium, which …

Phosphogypsum, a waste product from manufacturing fertilizer, emits radon, a radioactive gas. It also contains the radioactive elements …

Phosphogypsum (PG: CaSO4·2H2O) is a waste product generated by the phosphate industry. World production of this waste exceeds 200 million tonnes per year.

Phosphogypsum is a solid byproduct of the production of phosphoric acid, a major constituent of many fertilizers that has chemical and radioactive properties may cause environmental problems.

Phosphogypsum contains some heavy metals and radioactive elements that could pose serious environmental risks. Therefore, it is critical to ensure that the exposure to these impurities does not ...

This present work aims to mitigate the radioactive contaminants in Phosphogypsum (PG), a by-product generated from phosphate rock processing, by applying a new chemical additive before precipitation to repurpose it for construction materials. ... Nonetheless, the presence of hazardous minor elements in phosphogypsum and the associated leaching ...

Radioactive Elements. Phosphogypsum stacks present challenges due to the presence of radioactive elements embedded within their structure. These mounds contain naturally occurring radioactive materials (NORM), which are introduced during the processing of phosphate ores. As these ores are refined, trace amounts of uranium, thorium, and their ...

It goes through a chain of seven more transformations into unstable elements before reaching stability. A common unit of activity is the curie, named after Marie and Pierre Curie, who discovered radium. ... The scenarios assumed that the home has no floor to shield against the gamma rays associated with radioactive isotopes in the phosphogypsum ...

Phosphogypsum is primarily CaSO 4 ·2H 2 O, but also contains impurities of environmental concern such as residual acids, fluoride, heavy metals and naturally-occurring …

It goes through a chain of seven more transformations into unstable elements before reaching stability. A common unit of activity is the curie, named after Marie and Pierre Curie, who discovered radium. ... Radiation and Phosphogypsum; Radiation and Phosphoric Acid; Radioactivity and Phosphatic Clay Ponds; Phosphate Companies and EPA's Toxic ...

The paper presents the results of the dissolution characteristics of heavy and radioactive elements from PG, which is a by-product result from the industry of phosphate fertilizers. ... Favora DIT, Silva PSC (2006) Partitioning of radionuclides and trace elements in phosphogypsum and its source materials based on sequential extraction methods ...

ABSTRACT. For a detailed characterization of the 5.7 10 6 mt phosphogypsum (PG) stack in the vicinity of Bacau city, Romania, the air dose rate (ADR) was measured in 72 points covering the stack surface, while 10 samples of stack material were collected for future analysis. Radiometric determinations showed for the ADR values varying between 364 ± 53 and 489 ± 8 …

Phosphogypsum waste is a potential, secondary rare earth element (REE) source that is available in very large volumes. Extraction and purification of REE from this complex waste was studied using resin-in-leach (RIL) followed by batch elution.

The main forms of the presence of trace elements in phosphogypsum (PG). 3.4. Radionuclide composition of PG. In term of PG radioactivity, sedimentary phosphate ores are naturally enriched in radioactive elements. The radioactivity varies by phosphate rock type and is primarily caused by the U-238 and Th-232 decay series. Because U-235 is not as ...

Phosphogypsum, leaching, heavy elements, radioactive elements. The essential purpose of this paper is to illustrate and inspect the leaching characteristics of Iraqi Phosphogypsum (PG).

Usually, PG contains radioactive elements. The radioactivity of PG (in particular (α)) is due to the radium content resulting from the decomposition of uranium (present in the phosphate ore). ... The resulting radiation dose caused by phosphogypsum used as a construction or plaster material can be considered to be negligible [18,19].

The essential purpose of this paper is to illustrate and inspect the leaching characteristics of Iraqi Phosphogypsum (PG). The paper presents the results of the dissolution characteristics of heavy and radioactive elements from PG, …

Another matter of concern is the leachability of hazardous elements from phosphogypsum and thus the contamination of groundwater underlying phosphogypsum stacks (May & Sweeney, 1982, pp. 1–19, 1983, pp. 1–19). Since phosphogypsum waste is generally transported and disposed as aqueous slurry, phosphogypsum piles can be affected by tidal ...

3.3 Trace element and rare earth composition The form elements take in a solid such as phosphogypsum can be attributed to a number of processes, including precipitation in an essentially pure phase, fluid inclusions, co-precipitation, solid solution formation, and adsorption onto surfaces of the solid phase.

Phosphogypsum, a by-product of phosphate fertilizer production, is produced in large quantities worldwide. ... Natural abundances and mineralogical partitioning of trace elements in selected Alberta soils. Canadian Journal of Soil Science 60, 763-771. Google Scholar ... Montgomery, Alabama, U.S.A.: Eastern Environmental Radiation Facility ...

Figure 4: Effect of Solid to Liquid ratio on removed heavy and radioactive elements from Phosphogypsum by deionized water B. Effect of temperature For each phosphogypsum sample, the temperature was found to play a vital role in determining the removal efficiency of heavy and radioactive elements. A temperature range from 25 to 85 °C was ...

Natural phosphates used in the manufacturing of phosphoric acid, like many other ores, include radioactive elements, which get concentrated in phosphogypsum. Notably, radioactive elements present in phosphate deposits is uranium, which occurs naturally in concentrations ranging from 50 to 150 mg/kg . This presence of radioactive components in ...

for phosphogypsum by water deionized and obtain on a solution that contains heavy and radioactive elements (Cu, Zn, Pb, Cd, U, Ni, K, and Th ), were ... radioactive element concentration was ...

Phosphogypsum, leaching, heavy elements, radioactive elements. The essential purpose of this paper is to illustrate and inspect the leaching characteristics of Iraqi Phosphogypsum (PG). The paper presents the results of the dissolution characteristics of heavy and radioactive elements from PG, which is a by-product result from the industry of phosphate …