Phosphogypsum Recycling: A Review of …
The use of phosphogypsum for the production of composite materials based on asphaltic binders has been common, as well as in road construction for the construction of road bases and as an additive to …
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Valorization of phosphogypsum in cement-based materials…
1. Introduction. Sustainability is based on economic development, social equity and environmental protection. Different nations under various international agreements have committed themselves to the goal of preserving natural resources, and the construction of a sustainable built environment [1].Nowadays, energy efficiency …
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The Development of a New Phosphogypsum-Based Construction …
Phosphogypsum (PG) is a waste (or by-product) of the production of phosphoric acid, a basic constituent in the manufacturing of modern fertilizers. The annual production of phosphogypsum in Tunisia is currently estimated to be 10 million tons. Its storage in slag in close proximity to production plants generates pollution problems; …
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Phosphogypsum: Sustainable Management and Use
This report is addressing rapidly changing scientific, regulatory and policy perspectives concerning phosphogypsum (PG) management and use worldwide. It has been authored and reviewed by many of the world's top experts on PG from academia, international agencies and representatives of IFA's own member companies. The report …
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Florida needs more research on phosphogypsum's use in road construction
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 This came after a longstanding federal-level prohibition on using phosphogypsum, which was repealed by then-President Donald Trump's Environmental Protection Agency (EPA) in October …
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Phosphogypsum recycling: New horizons for a more …
The utilization of the phosphogypsum is also possible in the construction of road pavements. This study shows that we can obtain the required mechanical performance in terms of (E, Rt) for the construction of capping layer, foundation and base layer by adopting the following formulation:(CM:PG:SM) HRB=(10:25:65):7.
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Phosphogypsum – An Industrial Byproduct with Value
Phosphogypsum has also been studied for use in construction and building materials. Use in such applications is always attractive for industrial by-products, as it provides an outlet for mass utilization, which is often a key requirement of waste reuse. ... Other phosphogypsum uses such as conversion to sulfur, use as a landfill cover, or use ...
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Florida eyes plan to use radioactive mining waste in roads
Bills in the House and Senate that would authorize the Florida Department of Transportation to undertake demonstration projects and studies evaluating the use of phosphogypsum in road construction ...
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Potential uses of phosphogypsum: A review
Potential uses of phosphogypsum: A review J Environ Sci Health A Tox Hazard Subst Environ Eng. 2022;57(9):746-763. doi: 10.1080/10934529.2022.2105632. ... More specifically, PG can be used as a substitute in the cement industry, in building materials and in road construction, as a fertilizer for soil improvement, as a raw material for the ...
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Phosphogypsum
Building elements made of phosphogypsum, such as wallboards and similar construction elements, give yield to high values of radon emanation together with the mentioned elevated concentrations of 226 Ra. Phosphogypsum can be used in Portland cement as a setting time retarder in amounts below 4–5 wt%; then, it is diluted in the concrete and ...
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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 …
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Phosphogypsum and its Potential Use in Croatia: …
Phosphogypsum in construction industry. There are numerous ways and technologies to reuse by-products/residues in construction industry, most notably in Portland cement (both as cement and concrete), alkali-activated cement and concrete (geopolymers), ceramics and glass-ceramics, and gypsum, phosphogypsum in particular.
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Subpart R: National Emission Standards for Radon Emissions …
Approved Uses of Phosphogypsum (The Fertilizer Institute) On October 15, 2019, EPA received a request from The Fertilizer Institute (TFI), on behalf of its members that own or operate phosphogypsum stacks, to take phosphogypsum out of the stacks and use it in road construction. This request was subsequently revised on …
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Use radioactive gypsum waste for road construction? Never …
"To date, EPA has not received information or inquiries from any potential user indicating the desire to use phosphogypsum in road construction," said EnestaJones, an EPA spokeswoman.
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Phosphogypsum: potential uses and problems – a …
4 E. SAADAOUI ET AL. to the average annual effective dose from natural sources [25]. Besides, the resulting radi-ation dose caused by phosphogypsum used as a construction or plaster material can be
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Coatings | Free Full-Text | Factors Affecting the Strength …
Phosphogypsum (PG) is a kind of industrial solid waste residue that is generated during the wet production of phosphoric acid. The main mineral composition of PG is CaSO 4 ·2H 2 O, and it is currently employed mostly in the field of building materials and the chemical industry [].PG has a complex chemical makeup and contains …
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Utilization phosphogypsum as a construction material for …
The characteristics of phosphogypsum (PG) depend on the natural properties of the phosphate ore, the type of wet method used, the plant's operational …
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E-DOCKET: EPA-HQ-OAR-2020-0442
its 1992 BID, respectively, for various scenarios associated with use of phosphogypsum in road construction. The row numbers (1-4) denote exposure scenarios that are directly comparable. The lifetime risk of fatal cancer associated with the exposure is listed in the rightmost column. A value of 3
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Phosphogypsum as a construction material
Phosphogypsum (PG) is a by-product from the industry of phosphate fertilizer. Approximately 4–6 tonnes of PG are generated per tonne of phosphoric acid production. The continuous growth in the world population increases food production demand which requires an increase in phosphate fertilizer production resulting in an increase in PG …
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Phosphogypsum: Properties and Potential Use in …
sectors: road construction, building materials and agriculture. In agriculture, PG is used as an amendment for degraded soils (saline, sodic and acid soils) and as a fertil- ... Discuss the potential uses of phosphogypsum in agriculture (4) Define the effects of PG on crop production, soil, water, and the environment. Phosphogypsum contains
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EPA Approves Use of Phosphogypsum in Road Construction
Risk analyses conducted by TFI, and reviewed by the EPA, demonstrate that the proposed use of phosphogypsum in road construction is as protective of public …
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PHOSPHOGYPSUM: A Review of the Florida Institute …
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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Radioactive Material From Fertilizer Production | US EPA
The EPA has regulated phosphogypsum since 1989. The EPA requires phosphogypsum to be placed in stacks. All uses of phosphogypsum waste have been banned unless the waste has very little radioactivity. TENORM: Fertilizer and Fertilizer Production Wastes This webpage provides information on fertilizer and fertilizer …
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The Development of a New Phosphogypsum …
The first part is the study of the radioactivity of generated phosphogypsum, aiming to ensure that PG is safe to be used as construction material. The second part examines the physicochemical …
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"Radioactive" roads made of potentially cancer-causing …
"Any request for a specific use of phosphogypsum in roads will need to be submitted to EPA, as EPA's approval is legally required before the material can be used in road construction," the agency ...
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Approval of Other Uses of Phosphogypsum: Supporting …
On October 15, 2019, EPA received a request from The Fertilizer Institute (TFI), on behalf of its members that own or operate phosphogypsum stacks, to take phosphogypsum out of the stacks and use it in road construction. This request was subsequently revised on …
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The Development of a New Phosphogypsum-Based Construction …
The first part is the study of the radioactivity of generated phosphogypsum, aiming to ensure that PG is safe to be used as construction material. The second part examines the physicochemical characteristics of raw, washed and treated PG as well as prepared samples (PGM) using FTIR, XRD, SEM, EDX, adsorption/desorption of N 2 at …
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Exploring the potential reuse of phosphogypsum: A waste …
Phosphogypsum (PG), the main industrial by-product of phosphate fertilizer industry, primarily consists of calcium sulfate dihydrate. However, it contains various impurities with variable quantities depending on the origin of the phosphate rock. These impurities can restrict the reuse of phosphogypsum as a secondary primary resource.
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A review on the environmental impact of phosphogypsum and …
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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Recycling phosphogypsum in road construction materials …
We hope that PG can be used for road construction on a large scale in the future. This paper focuses on the latest developments in PG as road materials. ... Al-Hwaiti M.S. Assessment of the radiological impacts of treated phosphogypsum used as the main constituent of building materials in Jordan. Environ. Earth Sci. 2015; 74 (4):3159–3169.
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