phosphogypsum radioactivity in Oman

ما

phosphogypsum radioactivity in Oman

International Atomic Energy Agency

We would like to show you a description here but the site won't allow us.

ادامه مطلب

EPA approves use of radioactive phosphogypsum in roads, …

Recommended conditions include restricting the levels of radioactivity, notifying the public when phosphogypsum is used in a project and requiring "continued control, maintenance and use of the ...

ادامه مطلب

Phosphogypsum Recycling: A Review of Environmental …

The problem of recycling and storage of phosphogypsum is topical for many countries around the world, as it is associated with environmental problems of pollution of water bodies, land, and atmosphere. Therefore, this paper analyzes the directions of phosphogypsum recycling and possible alternatives to its use. The main …

ادامه مطلب

Phosphate, phosphoric acid and phosphogypsum natural radioactivity …

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 …

ادامه مطلب

EPA Approves Use of Phosphogypsum in Road Construction

WASHINGTON (October 14, 2020) — Today, U.S. Environmental Protection Agency (EPA) Administrator Andrew Wheeler approved a request from The Fertilizer Institute (TFI) to allow phosphogypsum to be used in government road construction projects. "Allowing the reuse of phosphogypsum shows EPA's commitment to working with industry in a way that …

ادامه مطلب

Phosphogypsum and its Potential Use in Croatia: Challenges …

Physico-chemical characteristics of phosphogypsum. Phosphogypsum is a grey, damp, fine-grained material (silty or silty-sandy) with a maximum grain size between 0.5 and 1.0 mm and 50–75 % of particles finer than 0.075 mm . The moisture content usually ranges between 8 % and 30 % (3, 6). Its density, strength, compressibility, and …

ادامه مطلب

A radiological evaluation of phosphogypsum

Phosphogypsum has physical properties that make it useful as a sub-base for roadways, parking lots, and similar construction. A radiological evaluation, to determine exposures to workers mixing this material with a stabilizing agent (portland cement), was performed at a South Louisiana phosphoric acid chemical plant. Measurements of the 226Ra ...

ادامه مطلب

Radioactivity in Future Phosphogypsum: New predictions …

Global food supplies currently depend on producing inorganic P fertilisers from a finite reserve of rock phosphate (RP). P fertilisers are themselves significant pollutants …

ادامه مطلب

Oman becomes world's largest gypsum exporter

Alawi Zawawi, Vice Chairman of USG Boral Zawawi Gypsum, a leading player in the export of natural gypsum, said that Oman has the potential to export cumulatively total more than 300 million tonnes over the next 15 years (2018-2032), going by current trends. At an average Export FOB price of $18 per tonne, this could generate …

ادامه مطلب

Imminent Failure of Phosphogypsum Stack in Tampa Bay …

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 …

ادامه مطلب

Radioactive Material From Fertilizer Production

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

ادامه مطلب

Natural radioactivity in phosphate rock, phosphogypsum and phosphate

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 …

ادامه مطلب

Radioactivity in Future Phosphogypsum: New predictions …

1. Introduction. Phosphogypsum (PG), a significant Technologically Enhanced Naturally Occurring Radioactive Material (TENORM) (IAEA, 2003), is a by-product of phosphoric acid production from rock phosphate – a process that underpins inorganic P …

ادامه مطلب

Phosphogypsum utilization in fired bricks: Radioactivity …

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 …

ادامه مطلب

Characterization of phosphogypsum deposited in Schistos remediated

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

ادامه مطلب

Natural radioactivity in phosphates, phosphogypsum and …

Natural radioactivity in phosphates, phosphogypsum and natural waters in Morocco J Environ Radioact. 2001;54(2):231-42. doi: 10.1016/s0265-931x(00)00153-3. Authors M Azouazi 1 ... The process of leaching of the radioisotopes from phosphogypsum was discussed. A method for the direct alpha counting of 226Ra thin source, elaborated by …

ادامه مطلب

Radioactive nuclides in phosphogypsum from the lowveld …

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 …

ادامه مطلب

TENORM: Fertilizer and Fertilizer Production Wastes | US EPA

Side view of phosphogypsum stack. Phosphate production generates huge amounts of phosphogypsum wastes, nearly 48 million MTs in 1988 alone. Industry estimates that 5.2 tons of phosphogypsum is produced for every ton of phosphoric acid. Phosphogypsum has little market value and is transferred as a slurry to waste piles …

ادامه مطلب

(PDF) Natural radioactivity in phosphate rock, phosphogypsum …

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.

ادامه مطلب

Assessment of Natural Radioactivity in Phosphogypsum …

The concentrations of radioisotopes (238U, 234U, 235U, 210Po, 232Th, 40K, and 226Ra) in naturally occurring radionuclide materials were determined through gamma and alpha spectrometry. The average activities of 226Ra, 232Th, and 40K were matched with literature data from various countries. The radium equivalent value derived …

ادامه مطلب

Properties, Purification, and Applications of Phosphogypsum…

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 …

ادامه مطلب

RADIATION RISKS FROM SELECTED USES OF BY

EPA defines Phosphogypsum. "...as a radioactive waste product that results from processing phosphate ore to make phosphoric acid that is later used in fertilizer. …

ادامه مطلب

Phosphogypsum production and utilization in China

Phosphogypsum (PG) is a radioactive industrial by-product produced in large quantities when processing phosphate ores into fertilizers. With rapid growth of high concentration phosphate and compound fertilizers production in China, PG production is increasing every year. Phosphogypsum is usually stored in such a way that it not only …

ادامه مطلب

Phosphogypsum circular economy considerations: A critical …

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 …

ادامه مطلب

Assessment of Natural Radioactivity in …

RESEARCH PAPER Assessment of Natural Radioactivity in Phosphogypsum Generated in Senegal: A Radiological Investigation Niang Modou1,2 • Zobair El Aﬁa1 • Fall El Hadji Mamadou4 • Mahmi Walid1,3 • Zefti Hanane1 • Fatimi Nezha1 • Niane Aliou4 • Boye Faye Ndeye Arame4 Received: 6 February 2024/Accepted: 15 April 2024/Published online: 20 …

ادامه مطلب

Natural radioactivity in mineral phosphate fertilizers and its …

Humans are constantly exposed to radioactivity present in rocks, soils, and water, mainly from materials in the Earth's crust that contain chemical elements belonging to the radioactive series of uranium and thorium. An important anthropogenic source of these natural radioisotopes to the environment is fertilizers, widely used to increase …

ادامه مطلب

Radioactivity in Future Phosphogypsum: New predictions …

Global food supplies currently depend on producing inorganic P fertilisers from a finite reserve of rock phosphate (RP). P fertilisers are themselves significant pollutants but their production from RP also leaves a phosphogypsum (PG) by-product that is sufficiently radioactive that its reuse is restricted. PG is mostly accumulated in open 'stacks' that …

ادامه مطلب

Radiological impacts of natural radioactivity from phosphogypsum piles

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 ...

ادامه مطلب

Phosphogypsum | US EPA

Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. Phosphogypsum contains radium, …

ادامه مطلب

A review on the environmental impact of phosphogypsum and …

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).

ادامه مطلب