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1. Introduction. Phosphogypsum (PG), a significant Technologically Enhanced Naturally Occurring Radioactive Material (TENORM) (IAEA, 2003), is a by-product of …
DOI: 10.1016/j.jenvrad.2022.106828 Corpus ID: 246594315; Radioactivity in Future Phosphogypsum: New predictions based on estimates of 'Peak P' and rock phosphate resources. @article{Willey2022RadioactivityIF, title={Radioactivity in Future Phosphogypsum: New predictions based on estimates of 'Peak P' and rock phosphate …
Research hotspots and trends of comprehensive utilization of phosphogypsum: Bibliometric analysis. Zhongqi Wei, Zhengbin Deng, in Journal of Environmental Radioactivity, 2022. Abstract. Phosphogypsum is a by-product of the phosphate fertilizer industry. It is generally treated by stacking, which not only causes environmental …
cal characterization of phosphogypsum (Duen˜as et al. 2010; Mitko et al. 2020; Predrag et al. 2020; Abril et al. 2009; Ousmane et al. 2021) there is limited information regarding phosphogypsum produced in Senegal. The pri-mary objectives of this study are to characterize Senegalese phosphogypsum radiologically, evaluate radiation expo-
Phosphogypsum (PG) accumulates during wet-phosphoric acid production for fertilizers. In the Philippines, PG is partly (40%) utilized to produce gypsum walls and cement. This work assesses the radiological risks and resource opportunities associated with PG stacks in the Philippines. The conducted in situ radiometric survey measured …
EPA defines Phosphogypsum. "...as a radioactive waste product that results from processing phosphate ore to make phosphoric acid that is later used in fertilizer. …
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 …
Most phosphogypsum is stockpiled while lesser quantities are recycled or dumped into water. Phosphogypsum is primarily CaSO 4 ·2H 2 O, but also contains impurities of …
Despite the radioactivity known to be contained in PG, the radiation dose resulting from the use of phosphogypsum piles, and received by the workers, is negligible compared Table 3. radioactive ...
Phosphogypsum (PG) is a solid by-product generated in the production of phosphoric acid (PA) using conventional synthesis methods. The raw material, about 50 …
Phosphogypsum stacks originating from the processing of phosphate rock contain small amounts of radionuclides, such as 226Ra. ... geochemistry in Mexico 13, and radionuclide transport in Germany 14.
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 1.33–2.59 for s-PG and the mixed PG (m-PG and s-PG). m-PG (particularly m-PG from Russia and some PG from China) typically shows relatively low radioactivity indexes of 0.24–0.45. m-PG and also …
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 ...
Journal of Environmental Radioactivity 54: 231-242. Google Scholar Beretka, J. (1990) The current state of utilization of phosphogypsum in Australia. In: Proceedings of the Third International Symposium on Phosphogypsum, Orlando, FL, FIPR Pub. No. 01-060-083, December 1990, vol. II 394-401. Google Scholar
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 …
Produced in significant quantities, the material is considered a waste in the US due to radioactivity, where the primary means of management is storage in "stacks." But around the world, phosphogypsum is increasingly being utilized in beneficial reuse applications, with research around the topic growing. How Phosphogypsum is Produced
Phosphogypsum stacks originating from the processing of phosphate rock contain small amounts of radionuclides, such as 226Ra. ... Observed radioactive quantities in the nation's aquifers vary ...
Florida lawmakers want to use radioactive material phosphogypsum to pave roads Phosphogypsum, a byproduct in the fertilizer industry, contains uranium and radium — and as the EPA notes, it also ...
This paper presents results in a room constructed using fired bricks made partly with phosphogypsum. Radon-222 concentration values are monitored and reported for two different seasons using a passive method (LR-115 dosimeters) and an active method (AlphaGuard) in spring season 2008 and using an active method the pulse type …
The utilization of PG in construction and the associated long-term exposure of humans to elevated levels of radioactivity is of great concern (Kovler, 2012). The radioactivity can affect organs, such as the heart, brain, lung, and lead to many diseases, including cancer (Dewar et al., 2013; Hund et al., 2015; Dashner-Titus et al., 2018).
Appendix 5 to Revised Request for Approval of Additional Uses of Phosphogypsum (pdf) (87.1 KB, December 2019) Report on recent measurements of PG radioactivity level in U.S. stacks. Appendix 6 to Revised Request for Approval of Additional Uses of Phosphogypsum (pdf) (786.4 KB, December 2019)
Manatee County officials have issued evacuation orders for the area surrounding Florida's Piney Point in anticipation of the imminent catastrophic collapse of a phosphogypsum stack retention pond holding up to 700 million gallons of wastewater. It has been reported that 22,000 million gallons a minute are being discharged from the …
Abstract. Phosphogypsum (PG: CaSO 4 ·2H 2 O) is a waste product generated by the phosphate industry. World production of this waste exceeds 200 million tonnes per year. PG, discharged into the sea, …
It has only been in recent years that the question of radioactivity has been raised and this question now influences every decision relative to potential use in building products in this country. Phosphogypsum utilization has evolved along three broad use groupings: (1) Chemical raw material (2) Agricultural applications (3) Construction ...
The concentration of metallic trace elements (Cr, Pb, Ni, Zn, Cu) in raw phosphogypsum ranged between 0.2 and 243 ppm, while its radioactivity reached 970 Bq/kg for Ra-226.
Phosphate deposits are generally characterized by enhanced radionuclide concentrations compared to natural levels. The mining and processing of this phosphate ore redistribute radionuclides throughout the environment and introduce them into phosphoric acid and phosphogypsum. Phosphoric acid is the starting material for triple …
The radiological impact of this radioactivity, varies with the mineralogical nature of the phosphates (Table 2) (Scholten & Timmermans, 1996) and requires a special care, especially in Morocco where these are important mines of phosphates and phosphogypsum.This country is contributing about two-thirds of the phosphates …
Phosphogypsum contains substantial quantities of P, which can be beneficial if large amounts of gypsum are applied. The levels of the other elements in the materials are so low that they are of little importance. Phosphogypsum from Florida contains 226 Ra and gives off radon (222 Rn) gas, which poses a potential health hazard (Mays and Mortvedt ...
We evaluated the suitability of phosphogypsum from the Lowveld region of South Africa (LSA), for the manufacturing of building materials, with reference to (1) the National Nuclear Regulator Act 47 of 1999 and (2) the radioactivity associated risks as quantified in terms of the external and internal hazard indices, the activity concentration index and the radium …
Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. Phosphogypsum contains radium, …
EPA defines Phosphogypsum (40CFR61 Subpart R) "…as a radioactive waste product that results from processing phosphate ore to make phosphoric acid that is later used in fertilizer. Because the phosphate ore contains uranium and radium, phosphogypsum also contains these radionuclides. The radium is of particular concern because it
DOI: 10.1016/J.JOBE.2019.100928 Corpus ID: 202179273; Phosphogypsum utilization in fired bricks: Radioactivity assessment and durability @article{Ajam2019PhosphogypsumUI, title={Phosphogypsum utilization in fired bricks: Radioactivity assessment and durability}, author={Lasaad Ajam and Abdurahman …