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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 fertiliser production for agriculture.Global food production is currently …
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Phosphogypsum, a by-product in phosphoric acid manufacturing process, produced in bulk quantity especially from the fertilizer industry, typically used as a supplementary fertilizer for soil ...
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The test samples used in this study were taken from phosphogypsum produced by a phosphorus chemical enterprise in the Deyang Region, Sichuan Province, China. The content of CaSO 4 ·2H 2 O in the phosphogypsum was 80.65%, and the whiteness was 27.68. The water content of the phosphogypsum was less than 5%, …
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According to a 2019 report from the Fertilizer Institute, an estimated 734 million tons of phosphogypsum have accumulated in the United States — a number the industry group projected to steadily increase each year. That material sits in more than 70 similar open-air piles, which can be hundreds of feet tall and hundreds of acres wide, …
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Red mud and phosphogypsum are the solid waste byproducts of the alumina and phosphoric acid production processes, respectively. Their global annual production has reached 1.1–12 billion tons and 150–200 million tons, respectively [1,2,3,4,5,6].Globally, the total amount of red mud produced every year is between 60 …
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As a typical solid waste, phosphogypsum (PG) is the by-product generated during the exploitation of phosphate resources 1,2,3. Global production of PG is estimated to be around 100–280 Mt ...
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Phosphogypsum can be used as a conditioner to improve the physical and chemical characteristics of soil, delay soil degradation, and passivate heavy metals to …
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Gypsum & Aluminium Ceiling Tiles/Boards & Fittings. Kingdom of Middle East is the leading importers, distributors and retailers of building material supplies in the Sultanate …
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Phosphogypsum (PG) is a by-product of the phosphate fertilizer industry, produced during the production of phosphoric acid. It is a grey, damp, fine grained powder, silt or silty …
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The present study aims at the stabilization of black cotton soil using two industrial waste that is Phosphogypsum and fly ash. Black cotton soil was treated with varying percentages of Phosphogypsum (2%, 4%, 6% and 8%) and with the combination of Phosphogypsum and fly ash. The treated soil was tested in terms of its engineering …
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In this study, we investigated a coarse phosphogypsum containing 49.63% SO3, 41.41% CaO, 10.68%, 4.47% SiO2, 1.28% P2O5, 0.11% F, CaSO4·2H2O purity of 80.65%, and whiteness of 27.68. …
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Phosphogypsum formed during the chemical processing of north Florida rock, however, has only 5 to 10 pCi/g and is sold to peanut farmers who use it as a soil amendment to provide the calcium needed to form strong peanut shells.
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In 1989, stacking of phosphogypsum became a legal necessity when the U.S. Environmental Protection Agency (EPA) banned the use of phosphogypsum. In 1992, this rule was modified to allow the use of phosphogypsum with an average radium-226 concentration of less than 10 picocuries/gram (pCi/g) for agricultural application as a soil …
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Gypcore offers high-quality gypsum boards for various construction projects in Oman and abroad. Learn more about their products, certification, and services on their website.
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gray-black powder. About 4.5-5t phosphogypsum is produced per 1t phosphoric acid. It is an acid by-product. Due to the complex and harmful impurity components, phosphogypsum cannot be directly ... including cement retarder, gypsum block, paper gypsum board and so on. 4. Application of phosphogypsum in building materials 4.1 …
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DOI: 10.1016/j.matpr.2020.05.819 Corpus ID: 226733128; Physico-mechanical properties of phosphogypsum and black steel slag as aggregate for bentonite-lime based materials @article{Harrou2020PhysicomechanicalPO, title={Physico-mechanical properties of phosphogypsum and black steel slag as aggregate for bentonite-lime based …
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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.
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Impurities in phosphogypsum, primarily fluorine and phosphates, complicate its use in any of the thermal processing schemes, but do not disqualify it from being used as a raw material. The plant in South Africa uses phosphogypsum as a feed stock, and the Polish plants are said to use a mixture of natural gypsum and phosphogypsum.
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This article reviews the physical-chemical properties and environmental impacts of phosphogypsum (PG), a byproduct from phosphate fertilizer production. It …
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2 Executive Summary: This document details the review performed by the U.S. Environmental Protection Agency, Office of Radiation and Indoor Air, Radiation Protection Division, in response to the Radiological Risk Assessment in Support of Petition for Beneficial Use of Phosphogypsum prepared for The Fertilizer Institute (TFI) …
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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 …
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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 …
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Sed el Masjoune is a seasonal lake, and more than 10,000 ha of saline land surround this lake. It corresponds to the final valley, where water runoff stored on the lake's high plateaus evaporates during the hot seasons, causing the soil salinization (El hasini et al., 2019).It has a semiarid climate with an average annual precipitation of 200 mm/year …
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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 …
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1. Introduction. Phosphogypsum (PG) is a bulk industrial solid waste of wet-process phosphoric acid production. Every ton of phosphoric acid production generates as many as 4–6 tons of PG, including more than 90% of CaSO 4 ·2H 2 O, a small amount of phosphorus, fluorine, organic matter, oxides, heavy metals, radioactive substances …
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The Black Steel slag (Ss) and phosphogypsum (PG) are industrial wastes produced in Morocco. In order to reduce these two wastes and to evaluate their pozzolanic reactivity in the presence of water, they were incorporated into bentonite (B) mixed with lime (L). The studied mixtures (BLW, BL–PG–W and BL–PG–Ss–W) were analyzed by X-ray …
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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.
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