آخرین محصولات

Sustainable Utilization of Phosphogypsum in Multi-Solid …

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 …

Phosphogypsum Facts: Issues Surrounding Phosphate …

phosphogypsum have been stockpiled in central and north Florida, with the total projected to grow to some one billion tons by the year 2000. Phosphogypsum Production Over the years, Florida has rather consistently produced 70% of the domestic phosphoric acid. In Florida, for each ton of phosphoric acid produced, 4.8 tons of phosphogypsum are ...

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 …

Oman becomes world's largest gypsum …

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 …

EPA Approves Use of Phosphogypsum in Road Construction

Phosphogypsum, a byproduct material of phosphate fertilizer production, is by regulation disposed of in massive, above-ground piles, commonly called "stacks." Each "stack" can span thousands of yards, be higher than a football field, and contain approximately 70 million tons of phosphogypsum.

Saudi's Ma'aden signs agreement to develop phosphogypsum …

The plant will use sulphur for the calcination of phosphogypsum and include technologies for CO2 capturing with lime produced from the calcination. Hasan Ali, Executive Vice President, Ma'aden Phosphate, said, "This pioneering patent, combined with our new CO2 capturing complex, underscores Ma'aden's commitment to sustainability.

Phosphogypsum: potential uses and problems – a review

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, watercourses or in wilderness stocks, contains toxic elements harmful to ecosystems and human health, including heavy …

Phosphogypsum as a construction material

Phosphogypsum (PG) is a by-product generated from the phosphorus fertilizer industry (phosphoric acid production). PG is similar to natural gypsum, but there are some differences, of which it contains some impurities such as water-soluble phosphate (P 2 O 5), water-soluble fluoride (F −) and P 2 O 5 substituted in the gypsum crystal …

Phosphogypsum: potential uses and problems – a …

produced as phosphoric acid, 4–6 tonnes dry mass of phosphogypsum are produced. Worldwide PG generation is estimated to be 200–250·106 tonnes per year; it was about

Phosphogypsum – An Industrial Byproduct with …

Phosphogypsum is a by-product of the phosphates industry. Produced in significant quantities, the material is considered a waste in the US due …

Phosphogypsum

Environmental impact and management of phosphogypsum. Hanan Tayibi, ... Aurora López-Delgado, in Journal of Environmental Management, 2009. Phosphogypsum (PG) is a waste by-product from the processing of phosphate rock by the "wet acid method" of fertiliser production, which currently accounts for over 90% of phosphoric acid …

Phosphogypsum | Encyclopedia MDPI

Phosphogypsum is an almost unused by-product of phosphate fertilizer production, which includes several valuable components—calcium sulphates and rare-earth elements such as silicon, iron, titanium, magnesium, aluminum, and manganese, as well as toxic elements such as heavy metals and others.

Phosphogypsum: Properties and Potential Use in Agriculture

Determine the physical, chemical, and radioactive properties of phosphogypsum. Discuss the uses of phosphogypsum in agriculture as a fertilizer, amendment to degraded soils, …

Radioactivity and elemental composition of phosphogypsum produced …

All freshly produced phosphogypsum had suffiently high fluoride levels that leaching and decomposition of silicate minerals beneath repositories might occur. Phosphogypsum from Idaho rock had elevated Ag, Cd and Se concentrations, and the greatest Ra-226 activity concentrations (up to 1780 Bq kg-~). Radon-222 emanation …

Gypsum Data Sheet

Asia, coupled with new gypsum product plants, spurred increased production in that region. As wallboard becomes more widely used in other regions, worldwide production of gypsum is expected to increase. World Mine Production and Reserves: Reserves for India, Iran, Oman, Pakistan, and Thailand were revised based on Government and other …

Resources | Free Full-Text | The Use of Phosphogypsum as a …

Only 15% of all phosphogypsum produced in the world is recycled; the remaining volume is stored or dumped into water reservoirs, which causes significant damage to the environment [].In this connection, the search for ways to use PG as a resource for the production of gypsum binders is a promised trend that will solve the …

Preparation of gypsum with high purity and whiteness from phosphogypsum …

Phosphogypsum (PG) is a solid waste product generated during wet-process phosphoric acid production. Various impurities considerably reduce the purity, whiteness, and application range of PG.

Reduction of phosphogypsum for SO 2 production: …

Phosphogypsum (PG) severely pollutes the environment and is difficult to recycle. PG is primarily composed of CaSO 4 · 2H 2 O. In this study, the characteristics of SO 2 released from the solid ...

Phosphogypsum: Properties and Potential Use in Agriculture

Phosphogypsum (PG) is a calcium sulphate dihydrate and a by-product of the phosphate fertilizer industry. It is produced in huge quantities (300 MT/year), but only 15% of the PG produced is recycled. Phosphogypsum is valued in several sectors: road construction,...

[Blog #8] Phosphogypsum production and impacts

Phosphate rock is predominantly mined and processed to obtain phosphorus – a key ingredient used to enhance plant productivity (Chen & Graedel, 2015). Currently, there are two predominant mining …

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. ... The waste that is created during fertilizer production is stored in large piles called stacks. Some stacks cover hundreds of acres and are hundreds of feet high. In the aerial ...

Radiation and Phosphogypsum

An exception is made for phosphogypsum with an average concentration less than 10 pCi/g radium which can be used as an agricultural amendment. EPA's ban was based on a single scenario which assumed that the by-product was used in road building or as an agricultural amendment and 100 years later a house was built on the farm field or the ...

Effective and innovative procedures to use phosphogypsum …

Phosphogypsum (PG) waste is a by-product generated from wet-process phosphoric acid (H 3 PO 4) manufacturing during phosphate rock decomposition.Worldwide, the annual production of PG ranges between 100 and 300 million tons, with only a few quantities utilized in several application domains (about …

Phosphogypsum: A Review of the Florida Institute of …

While some of the earlier plants in this country practiced water disposal, most of the phosphogypsum produced here has been piled on land. Again, it must be remembered that plant size (capacity) was a big factor in determining if there was a phosphogypsum problem. ... Phosphogypsum utilization has evolved along three broad use groupings: …

Phosphogypsum circular economy considerations: A critical …

Approximately 58% of the PG are stacked, 28% are discharged in coastal waters and only 14% are further processed. This critical review provides an overview of the physical-chemical properties of PG produced from sedimentary and magmatic …

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 ...

Moroccan Phosphogypsum: Complete Physico-Chemical …

This study has been carried out to valorize the Moroccan phosphogypsum (PG) generated during the production of phosphoric acid. The enormous Mondial waste of PG is estimated to be more than 100 Mt/year, which has sparked interest in its usage in other sectors. This work presents the results of the physicochemical characterization of …

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 between 100 to 300 Mt, with only 15% of that utilized while the rest is usually placed on large dumps with potential serious human and environmental impacts.

A review on the environmental impact of phosphogypsum …

Phosphogypsum (PG) is a solid by-product generated in the production of phosphoric acid (PA) using conventional synthesis methods. The raw material, about …

Phosphogypsum: Properties and Potential Use in …

Abstract Phosphogypsum (PG) is a calcium sulphate dihydrate and a by-product of the phosphate fertilizer industry. It is produced in huge quantities (300 MT/year), but only 15% of the PG produced is recycled. Phosphogypsum is valued in several sectors: road construction, building materials and agriculture.

محصولات مرتبط

 

دفتر مرکزی

No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.

 

مرکز تماس

Phone1: 0086-21-58386256

Phone2: 0086-21-58386258

 

پست الکترونیک

[email protected]