Phosphogypsum: A Review of the Florida Institute of …
Phosphogypsum utilization has evolved along three broad use groupings: (1) Chemical raw material (2) Agricultural applications (3) Construction materials. Each of these uses will be considered in more detail, but it should be pointed out that for years Florida has not been in the forefront of the efforts to utilize phosphogypsum.
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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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Phosphogypsum: potential uses and problems – a review
Phosphogypsum is used in agriculture for soil amendment or as fertilizer, as well as in the brick and cement industry, and in road construction Discover the world's research 25+ million members
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Application of Phosphogypsum in Road Construction
The issue of utilization of phosphogypsum is becoming more and more relevant, and there are several reasons for this: transportation of phosphogypsum to dumps and its storage require large capital ...
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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 through …
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Highly efficient modified phosphogypsum building gypsum …
The stockpiling of phosphogypsum is a waste of land resources and also causes serious pollution to natural resources such as water and atmosphere. This paper explores the mechanism of efficiently modified phosphogypsum and constructs a model and evaluation system for heavy metal leaching and migration transformation. The modified phosphogypsum is used …
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Phosphogypsum: Is Florida paving roads with radioactive …
A bill in the Florida House of Representatives, HB 1191, could potentially allow the Sunshine State to pave its roads with a material, phosphogypsum, that is known to have a number of radioactive ...
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High Strength Phosphogypsum and Its Use as a …
The use of materials containing naturally occurring radionuclides for house construction may enhance the natural radiation background to which some population groups are exposed.
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Florida Legislators Pass Law to Allow
What is known currently about HB 1191, which passed by a wide vote in the Republican controlled body, would require the Florida Transportation Department to research phosphogypsum paving projects ...
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Valorization of phosphogypsum in cement-based materials…
In this study, building phosphogypsum was used as the base material, and fly ash, lime, cement, and other materials were added to explore the performance of phosphogypsum-based cementitious ...
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Valorization of phosphogypsum in cement-based materials…
The work by Zemni et al. [44] provides a study on the generation of calcium silicate and sodium sulphate, through the chemical reactions between phosphogypsum and sodium silicate.The results showed that the solid produced during the reaction can sequester CO 2.Rashad [17] assessed the effect of PG on properties such as workability, density, mechanical …
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Florida House backs plan to use phosphogypsum in road construction
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), sponsored by Rep. Lawrence …
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Florida 'radioactive roads' bill signed into law | verifythis
Florida House Bill 1191; Environmental Protection Agency ... the DOT has to conduct "demonstration projects using phosphogypsum in road construction aggregate material" as it studies the usefulness of the material as a paving material. The DOT has until April 1, 2024 to provide its findings on the suitability of using the material for roads ...
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The Use of By-Product Phosphogypsum for Road Bases …
2. Material for the construction of highways and streets, 3. Material for pipe bedding, and 4. Material for load-bearing surfaces. While phosphogypsum does not present a viable alter native to use Number 1, it should be considered for the remaining categories. A significant portion of this construction mate
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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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High Strength Phosphogypsum and Its Use as a Building …
An experimental house has been constructed, in which walls and ceilings have been built of gypsum and phosphogypsum. Since phosphogypsum potentially contain …
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Status and development trends of phosphogypsum …
Phosphogypsum (PG) is a byproduct of the wet phosphoric acid process, with calcium sulfate as its primary component. Approximately 4.5–5.0 t of PG are generated per ton of phosphoric acid produced (Li & Gu, 2016).Globally, the cumulative stockpiles of PG have reached 6 billion t, with an annual increase of 200 million t (Ou et al., 2021).By the end of 2020, PG …
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Recent research in utilization of phosphogypsum as building …
About 15% of the phosphogypsum produced is used directly, mostly in fertilizers, soil stabilization measures, and raw materials for the construction industry [2, 4]. As a result, …
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Phosphogypsum and its potential use in Croatia: challenges …
Considerations to use PG as building material in construction industry should therefore rely on the activity concentration index as calculated with Equation 2: I= CRa 300 Bq/kg + CTh 200 Bq/kg + CK 3000 Bq/kg (Eq. ... Such PGs are simply not considered for use in construction. Phosphogypsum in agriculture PG has been used on agricultural land ...
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Recent research in utilization of phosphogypsum as building …
Phosphogypsum (PG) is a byproduct of the wet manufacturing process for phosphoric acid and is considered an industrial waste material. Around 5 tonnes of PG are generated for every 1 tonne of phosphoric acid production [1].As the phosphorus chemical sector has expanded rapidly in countries like the Middle East, Africa, Russia, the United States, and …
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Florida Could See Radioactive Waste Used In Road Construction
According to a report from NPR, the proposed HB 1191 would see the state of Florida and its Department of Transportation be compelled to study the use of phosphogypsum in road construction ...
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Phosphogypsum: Properties and Potential Use in Agriculture
Five clusters were formed: a red cluster-phosphogypsum recycling in the construction industry; green cluster-radiation pollution problem of phosphogypsum and phosphate fertilizers; yellow cluster ...
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Environmental Impact of Phosphogypsum-Derived Building …
The incorporation of construction and demolition waste in concrete and cement mortars is already a common practice, and the aim is to ensure the construction industry assumes part of the waste it produces [11,12]. The goal of this stream is to promote the use of conglomerates by incorporating waste to produce so-called "green concrete".
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Florida needs more research on phosphogypsum's use in road construction
Because phosphogypsum is a waste product, it is relatively low cost, but it does have potential use as a supplementary material in the concrete slurry used to build roads. A 1989 study from the University of Miami compared three roads constructed in Florida before the EPA's ban on phosphogypsum in road construction. It found that Parrish Road ...
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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 phosphoric acid production, where worldwide PG generation exceeds 300 million tons annually. The vast majority of produced PG is discarded irresponsibly, leading to …
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Notice of Pending Approval for Other Use of Phosphogypsum…
Any other use of phosphogypsum requires prior approval from the EPA. The EPA may approve a request for a specific use of phosphogypsum if it determines that the proposed use is at least as protective of public health as placement of phosphogypsum in a stack. The processes for requesting such an approval are described in 40 CFR 61.206.
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Florida Looks to Pave its Roads With Toxic Waste
(It was also used in concrete and cement before the state of Idaho banned its use in habitable construction in 1977.) Today, more than 70 stacks of phosphogypsum exist across the country. The ...
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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 ...
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Study on the Mechanical Properties of Cast-In-Situ …
Using cast-in-situ phosphogypsum as a wall material for buildings can consume a large amount of pollutants and improve the efficiency of building construction. The strength of …
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New Fla. law allows study of phosphogypsum as road …
The Fertilizer Institute, however, argues that the use of phosphogypsum in road construction is safe and is used in other parts of the world. In response to the EPA withdrawing its approval of the ...
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