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 (PG) is a solid grey, moist, fine-grained by-product powder generated during the production of phosphoric acid which has the chemical formula H 3 PO 4 through the digestion of ...
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Phosphogypsum (PG) is a common industrial waste from the production of phosphoric acid by the wet process. Usually, it requires pretreatment before use due to the presence of impurities. Developing a method that can be directly used to reutilize untreated PG in building materials is thus of great significance. Autoclaved aerated concrete (AAC) …
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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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The use of phosphogypsum for filling materials is feasible and has high value for natural resource conservation, environmental protection, and economic development 9 – 11. To improve the application of phosphogypsum filling materials (PFM) in building engineering, some scholars have focused on the physical behavior of the PFM.
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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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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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Only 15% of all phosphogypsum produced in the world is recycled; the remaining volume is stored or dumped into water reservoirs, which causes significant damage to the environment [].In this connection, the search for ways to use PG as a resource for the production of gypsum binders is a promised trend that will solve the …
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ties. e use of phosphogypsum for lling materials is feasible and has high value for natural resource conserva- tion, environmental protection, and economic development 9–11. To improve the ...
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1. Introduction. Phosphogypsum (PG) is the major by-product of the wet phosphoric acid industry (Li et al., 2023), which is primarily composed of calcium sulfate dihydrate, along with some impurities including soluble phosphorus, fluorine, and heavy metals (Ou et al., 2023).Approximately 4–5 tons of PG are generated from the …
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1. Introduction. Phosphogypsum (PG) is an industrial waste derived from the wet process for the manufacture of phosphorus fertilizer, during which the natural phosphate rock ore reacts with sulfuric acid [[1], [2], [3]]: (1.1) Ca 5 (PO 4) 3 F + 5 H 2 SO 4 + 10 H 2 O → 3 H 3 PO 4 + 5 C a SO 4 ⋅ 2 H 2 O + HFApproximately 4–5 tons of PG are …
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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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The results show that the synergistic effect of phosphogypsum, recycled fine powder and slag can not only control the production of ettringite (AFt) but also control …
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Phosphogypsum (PG) is a solid grey, moist, fine-grained by-product powder generated during the production of phosphoric acid which has the chemical formula H 3 PO 4 through the digestion of ...
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Phosphogypsum (PG) is a major hazardous by-product of the phosphate industry. The whole world is facing the challenge of increasing stockpiles of PG, which significantly affect safety and the ...
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This paper explores the mechanism of efficiently modified phosphogypsum and constructs a model and evaluation system for heavy metal leaching and migration …
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Geopolymer prepared from solid waste is a high value-added means. However, when used alone, the geopolymer produced by phosphogypsum has the risk of expansion cracking, while the geopolymer of recycled fine powder has high strength and good density, but its volume shrinkage and deformation are large …
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Abstract. Phosphogypsum (PG: CaSO 4 ·2H 2 O) is a waste product generated by the phosphate industry. World production of this waste exceeds 200 million tonnes per year. PG, discharged into the sea, watercourses or in wilderness stocks, contains toxic elements harmful to ecosystems and human health, including heavy …
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Phosphogypsum (PG) waste is a by-product generated from wet-process phosphoric acid (H 3 PO 4) 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 …
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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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The use of phosphogypsum for filling materials is ... A., Cien, D. N. & Pupeikisa, D. Porous alkali-activated materials based on municipal solid WIA with addition of phosphogypsum powder. ...
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Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. Phosphogypsum contains radium, which decays to form radon gas. Both radium and radon are …
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CaO/SO 3 significantly affected the mechanical characteristics of phosphogypsum slag cement. The effectiveness of an alkaline activator can be …
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Ground granulated blast-furnace slag (GGBFS) was supplied by the Wuhan GangHua Co., Ltd. in China. Its chemical composition was tested by XRF and given in Table 1.The phosphogypsum (PG) and the natural gypsum (NG) were used in this study, and their chemical compositions were given in Table 1.The mineral compositions of …
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Phosphogypsum (PG) is reused as aggregate in the cemented backfill, which effectively improves the PG reutilization efficiency. However, the massive …
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Phosphogypsum (PG) is a by-product of phosphate fertilizer production that contains various impurities and radionuclides. This review explores its properties, …
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Phosphogypsum is a by-product of phosphoric acid industrial production, and its stacking volume is increasing year by year, which brings a great threat to the environment and agricultural safety. The way of comprehensive utilization of phosphogypsum was described, and the mechanism of phosphogypsum producing cement, preparing …
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Phosphogypsum (PG) is a solid waste product generated during wet-process phosphoric acid production. Various impurities considerably reduce the purity, …
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Abstract Red mud and phosphogypsum are staple solid wastes, with considerably large annual emissions. Improving their comprehensive utilization is the key to addressing the large accretion of both red mud and phosphogypsum. They have great utilization potential and can be collectively modified to expand the utilization field and …
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Partly refined boric acid and phosphogypsum mixture can be used in place of natural gypsum for Portland and Trass cements [12]. It can be processed by wet sieving and washing process in the plant. The impurities of phosphate, fluoride, organic matter and alkalies are reduced by considerable extent.
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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 …
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Introduction. Phosphogypsum (PG) is an industrial by-product from the production of wet-process phosphoric acid [1]. Due to the preparation process of phosphoric acid, the main chemical composition of PG is dihydrate calcium sulfate (CaSO 4 ·2H 2 O). PG generally contains small amounts of impurities such as phosphorus, fluorine, organic …
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Phosphogypsum (PG) is a major industrial waste emitted during phosphate production. Facing the environmentally risky challenges posed by PG emissions and stockpiles, a review of the state of PG resource utilization in civil engineering and …
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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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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 ...
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12 Phosphogypsum: Properties and Potential Use in Agriculture 231 • Discuss the uses of phosphogypsum in agriculture as a fertilizer, amendment to degraded soils, and as an additive fertilizer industry. • Define the PG impacts on crop production, soil, water, and environment. 2 Phosphogypsum Generation and Storage Processes ...
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Collection of PG and soil samples. The gray PG powder was obtained from a factory in Guizhou, China. The main component of PG was dihydrate gypsum (CaSO 4 ·2H 2 O). It presented acidity as it ...
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1. Introduction. Phosphogypsum (PG) is among the by-products emitted by the phosphorus chemistry industry. About 5 tons of PG are emitted for each ton of phosphoric acid produced [1, 2], and its reaction is shown in Eq (1).About 300 million tons of PG are added annually, and total stockpiles exceed 600 million tons [3].PG is complex …
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