Dispersion of radionuclides and heavy metals from …
Phosphogypsum is classified into naturally occurring radioactive materials containing radionuclides such as 238 U, 226 Ra and 232 Th, and heavy metals which are …
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Phosphogypsum
Phosphogypsum is radioactive due to the presence of naturally occurring uranium (5 ... Of the radioactive elements that occur in quantity, radium is considered the most toxic. Radon is a chemical element; it has symbol Rn and atomic number 86. It is a radioactive noble gas and is colorless and odorless.
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Rare Finds Florida's Phosphate Mines Source of Rare Earth Elements …
It holds phosphogypsum waste, a radioactive byproduct of phosphate processing – and potential source of rare earth elements. (Serra Sowers/WUFT News) Rare Finds Scientists say Florida phosphates are significant sources of rare earth elements, highly sought for everything from cell phones to EVs.
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The Solubility of Phosphogypsum and Recovery of Heavy and Radioactive …
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 fertilizers. …
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BIOSORPTION OF RADIOACTIVE ELEMENTS FROM …
phosphogypsum samples, as well as the changes in radioactive elements content. KEY WORDS: Radioactive elements, Biosorption, Saccharomyces cerevisiae, Phosphogypsum CORRESPONDENCE: Mohamed G. Battah Faculty of science, Benha University, Egypt. E-mail: maamay57@yahoo Nahed M. Elayat * Nora Sh. Gad**
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Radioactive Material From Fertilizer Production | US EPA
Phosphogypsum, a waste product from manufacturing fertilizer, emits radon, a radioactive gas. It also contains the radioactive elements uranium, thorium and radium. Phosphate rock mining is the fifth largest mining industry in the United States in terms of the …
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Recovery and Separation of Rare and Radioactive Elements …
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 …
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Phosphogypsum analysis: total content and extractable element …
Phosphogypsum is not a commercial product and it is stocked in large open areas or accumulated in lakes inducing to a major environmental problem due to the presence of toxic and radioactive elements. The increasing world agricultural demand is the real responsible for the severity of this environmental problem. Nevertheless, there are some ...
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Production Waste Management: Qualitative and Quantitative
Phosphogypsum (PG: CaSO4·2H2O) is a waste product (or by-product) from the production of phosphoric acid, the main component in the production of concentrated simple and complex fertilizers. The world production of phosphogypsum exceeds 200 million tons per year. PG discharged into water bodies (seas, rivers) or disposed of in land dumps may contain …
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Soil contamination by trace elements and radioelements …
Agricultural soil contaminated by phosphogypsum pile stocked in plan air remains a major problem in M'Dhilla city southwestern of Tunisia. The present effort aimed to enhance the knowledge of trace elements and radioactivity abundance and to assess the corresponding environment. X-ray fluorescence s …
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RADIATION RISKS FROM SELECTED USES OF BY …
phosphogypsum also contains these radionuclides. The radium is of particular concern because it decays to form radon, a cancer-causing, radioactive gas. Phosphogypsum has few uses …
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EPA gives preliminary approval for phosphogypsum use in …
The EPA said Wednesday that it would grant a pending approval to Mosaic Fertilizer LLC to use a material called phosphogypsum in a few sections of road on the …
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PHOSPHOGYPSUM ANALYSIS: TOTAL CONTENT AND EXTRACTABLE ELEMENT
Phosphogypsum is not a commercial product and it is stocked in large open areas or accumulated in lakes inducing to a major environmental problem due to the presence of toxic and radioactive elements. The increasing world agricultural demand is the real responsible for the severity of this environmental problem.
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Gypsum and Phosphogypsum
Radioactive Elements: One of the significant concerns associated with phosphogypsum is its elevated content of naturally occurring radioactive elements, such as uranium and radium. The phosphate rock …
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The treatment of phosphogypsum leachate is more urgent …
Guerrero et al. found that the heavy metals, phosphorus, fluorine, and radioactive elements in the PG-L were hundreds of orders of magnitude higher than those in PG (Guerrero et al., 2021). Mingfu Meng et al. used a model based on water balance analysis to predict the generation of leachate from wet PG piles, and successfully predicted the ...
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Assessment of Natural Radioactivity in Phosphogypsum …
The production of one metric ton of phosphoric acid generates five of phosphogypsum (Papastefanou et al. 2006).Contrary to natural gypsum, phosphogypsum contains various impurities, including acidity remnants, fluorinated substances, trace elements such as arsenic, zinc, cadmium, chromium, lead, and radioactive compounds (Dalia et al. …
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Phosphogypsum: Properties and Potential Use in …
Discuss the potential uses of phosphogypsum in agriculture (4) Define the effects of PG on crop production, soil, water, and the environment. Phosphogypsum contains some heavy metals and radioactive elements that could pose serious environmental risks.
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Radiation and Phosphogypsum
Radiation and Phosphogypsum • Both natural gypsum and phosphogypsum contain radioactivity, but phosphogypsum contains more. • In the manufacture of phosphoric acid, the acid is filtered through cloth to remove solids. The radium is filtered out with the solids. The solid portion is known as phosphogypsum. ...
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(PDF) Phosphogypsum Processing Method
Phosphogypsum is not a commercial product and it is stocked in large open areas or accumulated in lakes inducing to a major environmental problem due to the presence of toxic and radioactive elements.
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BIOSORPTION OF RADIOACTIVE ELEMENTS FROM …
monazite and barite. Heavy metals and trace elements such as cadmium (Cd) and nickel (Ni) are also detected. Phosphate ores are naturally highly radioactive, and their radioactivity originates mainly from 238U and 232Th. Phosphogypsum (PG) is …
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Harmless disposal of phosphogypsum synergized red mud: Harmful element
Soluble P 2 O 5 and fluorine in phosphogypsum can jeopardize the environment and even human health. The application in building materials is a pathway to consume phosphogypsum on a large scale. However, the presence of soluble phosphorus causes significant retardation that reduces the early strength of building materials containing …
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Radioactivity in Future Phosphogypsum: New predictions …
Phosphogypsum (PG), a significant Technologically Enhanced Naturally Occurring Radioactive Material (TENORM) (IAEA, 2003), is a by-product of phosphoric acid production …
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Hurricane Milton threatens to scatter Florida's toxic …
Both of these elements are radioactive and pose cancer risks. In addition to radioactive materials, phosphogypsum stacks contain toxic heavy metals like arsenic, lead, and mercury.
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Phosphogypsum circular economy considerations: A critical …
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. ... Radioactive elements, most notably 226 Ra, 232 Th, 4 0 K result in the typical radioactivity indexes (I = (Ra/300) + (Th/200) + (K/3000)) of 1.33 ...
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Phosphogypsum as a component of calcium sulfoaluminate …
The CaSO 4 ·2H 2 O content in phosphogypsum (PG) exceeds 90%, which renders it suitable to be used as a component of calcium sulfoaluminate (CSA) cement. In this study, PG was utilized as a component of CSA cement. The immobilization of soluble phosphorus (s-P 2 O 5) and heavy metals in PG, the radioactivity and the performances of CSA cement …
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Radioactive waste roads in Florida: …
Florida is another step closer to paving its roads with phosphogypsum — a radioactive waste material from the fertilizer industry — after Gov. Ron DeSantis signed a controversial bill into law...
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Rapid removal of uranium (VI) by phosphogypsum …
Uranium is a naturally occurring radioactive element in the earth's crust. It exists in minerals and isotopes, such as uranium, cyan uranium, and other secondary uranium minerals [1], [2].The development of uranium mining and uranium nuclear industry has caused a large amount of uranium-containing wastewater to be discharged into the environment, causing …
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Phosphogypsum: Is Florida paving roads with …
As a result, phosphogypsum gives off traces of "the radioactive elements uranium, thorium, and radium," according to the agency. It can also emit the radioactive gas radon, which has been known to ...
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Effects and microbial mechanisms of phosphogypsum and …
The degradation of organic matter (OM) and CH 4 emissions during composting greatly influence the composting efficiency and greenhouse effect. This study evaluated the effects of adding phosphogypsum (PPG) and medical stone (MS) on OM breakdown, CH 4 emissions, and their underlying mechanisms. MS accelerated the breakdown of OM in the …
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(PDF) BIOSORPTION OF RADIOACTIVE ELEMENTS FROM PHOSPHOGYPSUM …
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.
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