Phosphogypsum Stacks
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 …
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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 …
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3.3 Use of Phosphogypsum in the Fertilizer Industry. Numerous studies have revealed that PG is used in the fertilizer industry as a source of S, Ca, and P, or as an acid, and as a composting additive. Potassium sulphate can be manufactured using various raw materials and methods. Sulphate reserves are becoming increasingly limited.
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The use of heat treatment can remove all impurities by subjecting the phosphogypsum to a temperature between 130 and 150 °C [125]. However, soluble phosphates are difficult to remove, and for this reason they affect the setting time and the level of strength of the cement [ 126 ].
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Preliminary Evaluation of the Use of Phosphogypsum for Reef Substrate. Ii. ... Thirty-three such stockpiles, totaling millions of tons of PG, are currently extant in the Gulf of Mexico region. The ...
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Phosphogypsum (PG), a solid by-product of phosphoric acid production, contains radionuclides and trace metals in concentrations which may pose a potential hazard to human health and the ...
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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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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 …
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Gulf of Mexico Science 16 (1). Phosphogypsum (PG), a solid by-product of phosphoric acid production in the fertilizer industry, contains radionuclides and trace …
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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 …
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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.
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It is estimated only 15% of the phosphogypsum is used for secondary commercial purposes and the common applications can include its use in cement production, building materials (e.g., bricks and ...
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phosphogypsum into the nonallowable category and therefore made phosphogypsum illegal for agricultural use (U.S. Gypsum Company 1990). Since then the U.S. Environmental Protection Agency (Federal Register 6/3/92) has permitted the controlled use of phosphogypsum in agriculture if radium-226 levels are <10 pCi g-1. This …
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The Biden administration announced it is withdrawing approval given by the Trump administration to use phosphogypsum in construction. The retracted approval had allowed the use of toxic, radioactive waste in constructing roads in parts of the United States prone to sinkholes and erosion. ... Healthy Gulf's purpose is to collaborate with …
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Phosphogypsum is the most significant industrial solid waste in the world. Phosphogypsum has a complex composition and its traditional storage methods occupy large areas of land and also damage the environment. Currently, phosphogypsum is mainly used for the direct preparation of construction materials and chemical auxiliary …
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from the use of phosphogypsum piles, and received by the workers, is negligible compared Table 3. radioactive nuclides in PG. a a Synthesis table according to several authors in several countries ...
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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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Phosphogypsum stack in West-Central Florida. By Seán Kinane/WMNF News (2010). The House on Wednesday passed a bill that would clear the way for demonstration projects about using phosphogypsum, a byproduct of the phosphate industry, in building roads.. House members voted 81-25 to approve the bill (HB 1191), …
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Phosphogypsum (PG) is a solid waste produced from decomposition of phosphate rock in sulfuric acid. It can improve the physicochemical properties of soil. However, the application of PG will ...
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Phosphogypsum (PG ), a solid by-product of phosphoric acid production in the fertilizer industry, contains radionuclides and trace metals in concentrations which are potentially …
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Florida Gov. Ron DeSantis recently signed a bill that will allow the Florida Department of Transportation to study the use of phosphogypsum in road construction. This came after a longstanding federal-level prohibition on using phosphogypsum, which was repealed by then-President Donald Trump's Environmental Protection Agency (EPA) in October …
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Previous studies have utilized the PHREEQC model to understand the behavior of radionuclides in coastal Brazil 11,12, geochemistry in Mexico 13, and radionuclide transport in Germany 14.
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The EPA has long banned the use of phosphogypsum, the waste left behind from mining phosphate rock., saying it contains "radioactive material." The EPA has long banned the use of phosphogypsum ...
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Background: Alkaline soils with high calcium carbonate and low organic matter are deficient in plant nutrient availability. Use of organic and bio-fertilizers has been suggested to improve their properties. Therefore, a greenhouse experiment was conducted to evaluate the integrative role of phosphogypsum (PG; added at 0.0, 10, 30, and 50 g PG kg-1), …
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In 2020, the Trump EPA approved phosphogypsum's use in road projects. Groups including Healthy Gulf, Sierra Club, and North America's Building Trade Unions filed a petition in court to rescind ...
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The issue has drawn attention, at least in part, because phosphogypsum includes radioactive elements. It is stored in huge stacks. Opposition to phosphogypsum in roads. Opponents raised questions about the potential hazards of using phosphogypsum, including whether it could harm people working on roads and …
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Semantic Scholar extracted view of "Preliminary Evaluation of the Use of Phosphogypsum for Reef Substrate in the Gulf of Mexico" by D. Nieland et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,725,700 papers from all fields of science. Search ...
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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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The phosphogypsum valorization became a necessity when the U.S. Environmental Protection Agency (EPA) legislation was modified in 1992 and allowed the use of PG with an average 226 Ra of less than 370 Bq/kg for agricultural applications such as a soil amendment. Other areas in the world, however, looked at PG as a valuable raw …
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Phosphogypsum, a waste product from manufacturing fertilizer, emits radon, a radioactive gas. It also contains the radioactive elements uranium, thorium and radium. Phosphate rock mining is the fifth largest mining industry in the United States in terms of the amount of material mined. The phosphate industry is concentrated in the …
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