the hazards of phosphogypsum in Oman

The leaching characteristics of common toxic elements in phosphogypsum …

Phosphogypsum (PG) is an acid by-product from the production phosphate fertilizers that is produced in large amounts all over the world. However, it is challenging to reuse this waste due to the quantities of various impurities in PG and technical restrictions, resulting in PG accumulation, which threatens adjacent environments.

Hazardous Spills at Retired Fertilizer Manufacturing Plants …

In 1992, the U.S. Environmental Protection Agency (EPA) banned the use of phosphogypsum exceeding a certain radioactivity level (10 picocurie/gram), resulting in most phosphogypsum being stored in large stockpiles, visual reminders of the noncircularity of phosphorus resources. In 2020, the EPA reversed this decision to allow …

Phosphogypsum: Properties and Potential Use in …

2.3.2 Physical Properties. Phosphogypsum is greyish and has a granulometry of fewer than 250 microns, 77 μm on average (Lassad et al. 2008). The density of PG is 2.98 …

Request to Use Phosphogypsum in Government Road Projects…

Withdrawal of Approval of TFI Request for Use of Phosphogypsum in Road Construction (pdf) (4.45 , June 30, 2021) Letter from EPA Administrator Michael S. Regan to The Fertilizer Institute withdrawing the conditional approval to remove phosphogypsum from required stacks for use in government road projects.

From Grave to Cradle: Treatment, Resource Recycling, and …

Phosphogypsum (PG) wastes, including solid-state PG and liquid-state PG leachate, are industrial byproducts generated during the production of phosphoric acid. It is of great concern due to the large-scale product accumulation and environmental and geological hazards. Harmless treatment and green chemical resource utilization …

The leaching characteristics of common toxic elements in …

Phosphogypsum (PG) is an acid by-product from the production phosphate fertilizers that is produced in large amounts all over the world. However, it is challenging …

Potential uses of phosphogypsum: A review

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 …

Guest Op/Ed: Phosphogypsum and Radiation

The long term economic, environmental, and health impacts of this have not been fully realized. Phosphogypsum has been banned in all uses since 1992 because it causes cancer. ... The EPA and DEP lack adequate regulations needed to protect the public and the environment from hazards associated with gypsum stacks and dispersal of …

Assessing the hepatotoxicity of phosphogypsum leachate in …

The phosphogypsum leachate for the experiment was collected from the surface of an open-air leaching pond (with a volume of 2000 m 3) in the phosphorus chemical industry area of Kaiyang County, which is located northeast of Guiyang City, Guizhou Province, China (Fig. 1).A large phosphogypsum landfill is located near the …

Recycling phosphogypsum in road construction materials …

Phosphogypsum (PG) is a major hazardous by-product of the phosphate industry. The whole world is facing the challenge of increasing stockpiles of PG, which significantly affect safety and the environment. ... discuss the radiological hazards of PG, and analyse the current status of PG applications and research in highway engineering. …

Phosphogypsum Factsheet

2. Regulate the safe treatment, storage and disposal of phosphogypsum as hazardous waste; 3. Designate phosphogypsum a high-priority substance for risk evaluation; 4. Require manufacturers to conduct testing on phosphogypsum and process wastewater; and 5. Determine that the use of phosphogypsum in road construction is a significant …

Phosphogypsum: Properties and Potential Use in Agriculture

2.1 Phosphogypsum Generation Processes. The wet and dry process are the two main commercial processes used to produce phosphoric acid from natural phosphate. The dry process consists of a thermal reduction of rock phosphate at 2000 °C using an electrical furnace in the presence of coke or silica.

Valorization of phosphogypsum in cement-based materials…

The P 2 O 5 and F are found in three forms: (i) on the surface of phosphogypsum crystals with water-soluble compounds (H 3 PO 4, Ca(H 2 PO 4) 2 ·H 2 O, NaF); (ii) substituted in the lattice of phosphogypsum crystal (effectively solid solutions of CaHPO4·2H 2 O or Na 2 SiF 6) in PG; and (iii) as insoluble compounds (Ca 3 (PO 4) …

Efficiency of the use of neutralized phosphogypsum, …

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. …

Study on the Mechanical Properties of Cast-In-Situ Phosphogypsum …

The application of cast-in-situ phosphogypsum as the wall material of building structures can greatly reduce the environmental pollution caused by phosphogypsum. Through the uniaxial compression test of cast-in-situ phosphogypsum specimens, the compressive strength of cast-in-situ phosphogypsum is determined, …

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 …

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 …

Florida Legislature approves using radioactive …

Opponents raised questions about the potential hazards of using phosphogypsum, including whether it could harm people working on roads and whether it could affect water in aquifers. On Monday, thirty …

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. 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 …

The chemical behavior of the different impurities present in

Abstract Phosphogypsum (PG) is an acidic by-product that is created during the production of phosphoric acid using the sulfuric acid route. The management of PG poses a significant environmental challenge worldwide due to its large quantity and chemical composition. While PG primarily consists of calcium sulfate dihydrate, it also …

The using of waste phosphogypsum and natural gypsum …

Waste phosphogypsum and natural gypsum were used as stabilization material to produce the adobe samples. The amounts of additive used in investigation varied between 0% and 25%. ... Effect of lime, cement and Sarooj (artificial pozzolan) on the swelling potential of expensive soil from Oman. Build Environ, 40 (6) (2005), pp. 681 …

Research Progress on Resource Utilization of Phosphogypsum

The impurities in phosphogypsum and its harm to the environment were introduced, and the advantages and disadvantages of the widely used pretreatment methods were analyzed in this paper. The application of phosphogypsum in the fields of cement retarder, building materials, agriculture, the production of sulfuric acid co …

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 …

A systematic review of phosphogypsum recycling industry …

The production and hazards of phosphogypsum. Based on the China Industrial Statistical Yearbook and China Phosphate and Compound Fertilizer Industry Association, Hou et al. (2022) calculated that China's annual production of PG reached 62 × 10 6 t in 2010 and increased to 75 × 10 6 t in 2020, an increase of 20.97%.

Exploring the potential reuse of phosphogypsum: A waste or …

Abstract. Phosphogypsum (PG), the main industrial by-product of phosphate fertilizer industry, primarily consists of calcium sulfate dihydrate. However, it …

Geochemical and mineralogical characterization of phosphogypsum …

Phosphoric acid manufacturing generates large amounts of phosphogypsum (PG); a by-product generally disposed in the surface or evacuated in the seawater without any pretreatment. Phosphogypsum may host non-negligible amounts of valuable elements such as rare earth elements (REEs), which are critical elements on …