The current study presents the results of the chemical and the radiochemical characterization of phosphogypsum obtained from the former Wizów Chemical Plant in Poland. Phosphogypsum is a residue obtained from phosphoric acid production. ... Phosphogypsum mainly contains calcium sulfate dihydrate and impurities originating from the source ...
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Phosphogypsum is an industrial byproduct generated in the wet phosphoric acid process (Pinto et al., 2020; Jiang et al., 2019; Taher, 2007), and its output accounts for approximately 4-6 times the mass of produced H 3 PO 4 (Kuzmanovic et al., 2021; Yang et al., 2016).The wet process technique is the main method used in acid production (Wang and Jia, …
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Phosphogypsum is composed mainly of gypsum (Ca-SO4-2H20), but contains impurities of environmental concern such as F-, acids, trace elements, and naturally occurring radionuclides, ... F- and other constituents from the PG used in the current experiment. MATERIALS AND METHODS Collection of Phosphogypsum Samples
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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 …
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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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PHOSPHOGYPSUM USE. Phosphogypsum use in a circular economy ... Billions of tonnes of this material are currently being managed at great cost within giant waste stacks. Although gypsum is the main constituent of phosphogypsum, a range of other impurities can also be present, including residual phosphate, fluoride, organic matter, iron, aluminium ...
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However, the utilization of PG still mainly relies on basic utilization methods, such as being used as a cement retarder, in building materials, for road construction, or mine filling, currently (Cui et al., 2022).Due to factors such as limited regional market demand, low product added value, and restricted transportation radius, relying solely on PG-based building …
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Many efforts have been made to achieve the resourceful use of phosphogypsum and to promote the sustainable development of phosphorus chemical enterprises [17], [18]pared with cement, phosphogypsum is simple to prepare, low cost and cost-effective [19], which meets the requirements of green and low-carbon development in the construction …
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The use of phosphogypsum for road construction has been suspended because of the short duration of the roadway covering and the possibility of harmful components of phosphogypsum getting into the environment. In addition, the use of phosphogypsum in the construction materials and cement industry has been slowed down by the economic crisis. 2.1.
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Phosphogypsum (PG) is the most significant solid waste in the world. ... The raw material used during the process consists mainly of phos- ... Currently, the main applications of PG, according to ...
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Phosphogypsum is used in agriculture for soil amendment or as fertilizer, as well as in the brick and cement industry, and in road construction. Phosphogypsum (PG) is a waste product of the...
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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 States, and …
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The natural gypsum is mainly used as a cement manufacturing retarder [1,2,3], while ... currently there is a great interest in using PG after the removal of impurities as an alternative raw ... M.S. Assessment of the radiological impacts of treated phosphogypsum used as the main constituent of building materials in Jordan. Environ. ...
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The current growth rate of phosphogypsum is estimated at 200 million tons per year, with a mass utilization rate of 10–15% according to the most optimistic forecasts. ... Analysis of Trends in Phosphogypsum Use. ... Phosphogypsum in mixtures with other components is mainly used for the construction of road bases [55,56,57], because ...
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A recently published study by the International Fertilizer Association (IFA) reveals that up to 25 percent of phosphogypsum produced annually is now reused for a range of …
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Numerous experimental sections have, however, been constructed in Texas and monitored over extended periods with very good results. 8 Phosphogypsum is used as raw material for manufacturing non-fired load-bearing wall bricks. 9 Recently, scientists in North Africa are trying to use phosphogypsum in the manufacture of bricks to satisfy the high ...
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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 materials, but the amount of phosphogypsum …
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Phosphogypsum mainly consists of silt-sized gypsum crystals. These gypsum crystals are softly aggregated, ... Currently, researchers mostly use inorganic acids as leaching agents to leach REEs in PG. Strong acids, such as nitric acid and sulfuric acid, have attracted the attention of researchers because of their high leaching and recovery rates ...
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Phosphogypsum has been studied for use in cement, bricks, plaster, and more, often with added benefits over materials. When used as a replacement for limestone, for example, phosphogypsum has proven to offer a better roadbed.
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The US EPA currently bans the use of phosphogypsum, except in cases where the material does not exceed an average radium-226 concentration of less than 10 picocuries per gram, and will be used as a soil amendment, according to the Florida Industrial and Phosphate Research Institute. ...
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In China, the domestic utilization of phosphogypsum is mainly in building materials, industry, and agriculture. As shown in Fig. 4, from 2015 to 2019, in China, phosphogypsum was mainly used in terms of external supply, cement retarder and gypsum board, filling, etc. Thus, China's use of phosphogypsum is still at a low level and low value stage.
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Currently, phosphogypsum is mainly used for the direct preparation of construction materials and chemical auxiliary materials, but the amount of phosphogypsum used in this process is small, so its ...
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Although phosphogypsum is still generally disposed of as waste, industry attitudes are changing and greater use of phosphogypsum will be expected in a circular economy. The …
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Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. The phosphate ore and the resulting phosphogypsum contain radium, which decays to form radon gas. Both radium and radon are rad
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Currently, phosphogypsum is mainly used for the direct preparation of construction materials and chemical auxiliary materials, but the amount of phosphogypsum used in this process is small, so its ...
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Currently, more than 280 million tons of phosphogypsum every year in the world is currently being discarded in coastal areas or elsewhere and stored at production sites as stockpiles, with about ...
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product. Due to the complex and harmful impurity components, phosphogypsum cannot be directly used. At present, the global phosphogypsum accumulation has reached 6 billion tons and is still growing at 150 million tons per year. China is a by-product country of phosphogypsum. How to use phosphogypsum efficiently has become a big problem in China.
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Phosphoric acid is mainly utilized in the fertiliser industry to produce the phosphorous fertilisers monoammonium phosphate (MAP) and diammonium phosphate …
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The greatest use of phosphogypsum is in agricultural applications. Researchers proposing new uses must file an application with EPA. Phosphogypsum has been used in agriculture as a source of calcium and sulfur for soils that are deficient in these elements. When the phosphogypsum is used as a fertilizer, it is simply spread on the top of the soil.
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Soil is among the most important natural resources that can be degraded in varied forms. Soil degradation is a change in the soil's health that reduces its ability to provide goods and services (FAO and ITPS 2015). Population and income growth are expected to necessitate a 70% increase in global food production by 2050 an…
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The works [20,21,22] introduced the early-stage development of several phosphogypsum blocks and the current applications of unburned phosphogypsum permeable bricks. The works ... The raw materials of cast-in-situ phosphogypsum are mainly phosphogypsum, phosphorus slag powder, hydrated lime, cement, a retarder and a water …
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Phosphoric acid is mainly used in the production of phosphorus fertilizers: DAP ... [14]. Currently, in Northern Kazakhstan, PG is used for fertilization ... ation dose caused by phosphogypsum ...
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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 replace natural …
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Phosphogypsum(PG) is one of the typical bulk industrial solid wastes generated in the phosphate chemical industry. Due to its huge production volume and immature resource treatment technology, a large amount of PG can only be stored and disposed in slag yards, and its impact on the ecological environment is becoming increasingly significant during long-term …
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The report recommended to continue regular monitoring and seek further solutions for possible re-use of phosphogypsum. Currently, over 50–65 million tons of phosphogypsum are accumulated in Ukraine. ... The aggregate composition of phosphogypsum is mainly comprised of particles sized 0.15–0.20 mm (65–70%) (Wolicka 2008; Shuisky et al ...
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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 replace natural gypsum materials for resource utilization.
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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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Phosphogypsum circular economy considerations: A critical review from more than 65 storage sites worldwide ... which is a key ingredient in fertilizer. It is mainly found in marine sedimentary deposits, igneous rocks, and guano. ... it is noteworthy that in case of fresh PG changes in the current phosphoric acid production processes (sulfuric ...
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The comparison of the developed phosphogypsum processing method with well-known national and foreign analogues showed that its cost-efficiency is 2-3 times higher; the area necessary for the plant ...
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Phosphogypsum (PG), a byproduct during the phosphoric acid production process, also known as the wet process, contains complex and diverse impurities, resulting in low utilization and considerable ...
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