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 …
Potential uses of phosphogypsum: A review
Potential uses of phosphogypsum: A review. Maria Pliaka Laboratory of Environmental Management and Industrial Ecology, ... More specifically, PG can be used as a …
Recycling phosphogypsum in road construction materials …
Phosphogypsum is usually a yellowish-white, light greyish-white or dark grey fine powdery solid. The main component of PG is CaSO 4 ·2H 2 O, which accounts …
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.
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
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
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 …
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 as a construction material
Introduction. 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 …
Radioactive waste roads in Florida: Phosphogypsum can be …
Florida Gov. Ron DeSantis has approved a plan to use phosphogypsum, a radioactive waste material, in "demonstration projects." Here, signs block a roadway in Boca Raton during a construction ...
Phosphogypsum and the EPA Ban
Other areas of the world, however, looked at phosphogypsum as a valuable raw material and developed processes to use it in chemical manufacture and construction materials. In 1989, stacking of phosphogypsum in the U.S. became a legal necessity when the U.S. Environmental Protection Agency (EPA) banned its use.
Utilization phosphogypsum as a construction material for …
Phosphogypsum (PG) is a by-product of the production of fertilizers from phosphate ores, and it contains some harmful substances to the environment. Thus, it is necessary to stabilize/solidify pollutants when using PG as a filling material. The purpose of this study is to investigate and verify the use of PG as a filling material for a road base …
Potential uses of phosphogypsum: A review
Potential uses of phosphogypsum: A review. Maria Pliaka Laboratory of Environmental Management and Industrial Ecology, ... 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 production of some chemicals, and as ...
Valorization of phosphogypsum in cement-based materials…
Scanning electron microscopy (SEM) has been widely used to study the morphology of phosphogypsum. By using this technique, it is possible to identify the shape and growth of the crystals. In addition, ... The existing specifications correspond to that of construction gypsum plaster (β-PG), which undergoes the calcination process …
Recycling phosphogypsum in road construction materials …
Phosphogypsum is usually a yellowish-white, light greyish-white or dark grey fine powdery solid. The main component of PG is CaSO 4 ·2H 2 O, which accounts for more than 90% of its total composition. In addition, PG contains phosphorus, fluorine, organic matters and other impurities (e.g. heavy metal elements and nuclides) (Rashad, …
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 …
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.
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 …
(PDF) Valorization and potential uses of Phosphogypsum: …
Phosphogypsum (PG), a solid by-product of phosphoric acid production in the fertilizer industry, contains radionuclides and trace metals in concentrations which are potentially hazardous to human ...
Effective and innovative procedures to use phosphogypsum …
Phosphogypsum (PG) waste is a by-product generated from wet-process phosphoric acid (H3PO4) 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 15%), the unused PG is usually …
Application of phosphogypsum in soilization: a review
Phosphogypsum is the most significant industrial solid waste in the world. Phosphogypsum has a complex composition and its traditional storage methods …
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
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 …
Chemical treatment of phosphogypsum and its potential …
The results for the untreated gypsum revealed that phosphogypsum used in this study was radioactive and laden with ra ionuclides such as 210Pb, 214Pb, 214Bi, …
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 ...
Phosphogypsum – An Industrial Byproduct with …
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 …
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 …
EPA approves use of radioactive phosphogypsum in roads, …
Recommended conditions include restricting the levels of radioactivity, notifying the public when phosphogypsum is used in a project and requiring "continued control, maintenance and use of the ...
EPA withdraws rule allowing use of radioactive material in …
The Environmental Protection Agency (EPA) has withdrawn a 2020 rule that would allow a radioactive substance in some road construction.. The October 2020 rule allowed the use of phosphogypsum, a ...
Feds expect to decide this year on Mosaic's plan to test …
"Alternative uses of phosphogypsum must be at least as protective of public health as placement in gypstack systems, and to date, no applications have met this standard," Ragan Whitlock, an ...
Florida lawmakers want to use radioactive material to pave …
The EPA says "phosphogypsum remains prohibited from use in road construction," as it has been almost continuously for more than 30 years. Under former President Donald Trump, the EPA briefly ...
Utilization phosphogypsum as a construction material for …
Phosphogypsum (PG) is a by-product of the production of fertilizers from phosphate ores, and it contains some harmful substances to the environment. Thus, it is …
The Use Of Cement-Stabilized Phosphogypsum Mixes In Road Construction
Semantic Scholar extracted view of "The Use Of Cement-Stabilized Phosphogypsum Mixes In Road Construction" by M. C. Takeda et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,612,084 papers from all fields of science. Search ...
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.
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 ...
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 …