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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 accumulation of original phosphogypsum (OPG) has occupied considerable land resources, which have induced significant environmental problems worldwide. The OPG-based cemented paste backfill (OCPB) has been introduced as a promising solution. In this study, a water-washing pre-treatment was used to purify OPG, …
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Phosphogypsum (PG) is a by-product of the phosphate fertilizer industry that is produced during the phosphoric acid production process. Annual global PG production ranges …
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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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1. Introduction. Phosphogypsum (PG) is a waste by-product generated during the preparation of phosphoric acid through the reaction of sulfuric acid and phosphate rock (Al Attar et al., 2011).PG is primarily composed of CaSO 4 ·2H 2 O, with small amounts of impurities such as phosphates, heavy metals, fluorides, and organic …
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In 1989, stacking of phosphogypsum became a legal necessity when the U.S. Environmental Protection Agency (EPA) banned the use of phosphogypsum. In 1992, this rule was modified to allow the use of phosphogypsum with an average radium-226 concentration of less than 10 picocuries/gram (pCi/g) for agricultural application as a soil …
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The waste product phosphogypsum (PG) is produced in phosphoric acid production processes. Its storage requires large amounts of land resources and poses serious environmental risks. In this work, … Expand
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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 environment. ... However, only 15% of global PG resources (Wu et al., 2022a) are used in agriculture, construction and chemicals.
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The issue has drawn attention, at least in part, because phosphogypsum includes radioactive elements. It is stored in huge stacks. Opposition to phosphogypsum in roads. Opponents raised questions about the potential hazards of using phosphogypsum, including whether it could harm people working on roads and …
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Phosphogypsum (PG) is the primary byproduct generated during the production of phosphoric acid, an intermediate product in phosphate fertilizer production, from calcium phosphate (apatite) ore. PG also exists in very small amounts in nature where it is the result of natural guano processes as they took for instance place in the …
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The Oman Daily Observer newspaper has reported that India received 4.84Mt (49%) of Omani gypsum exports during the year. This accounts for 87% of the …
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The massive accumulation of phosphogypsum will not only bring economic burden to the enterprise, but also pollute the environment. The types of impurities in phosphogypsum and their pretreatment methods were expounded, phosphorus and fluorine impurities can be removed by water washing, acid-base neutralization, sieving, …
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This necessitates thorough testing of phosphogypsum to confirm feasibility and gather the data necessary for scale up around the unique source of phosphogypsum to be processed and its intended application. Conclusion. Phosphogypsum is a large-scale waste in the phosphates industry, incurring substantial management costs every year.
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The obtained results suggest that the impact of the phosphogypsum stack on the Martwa Wisła waters is rather insignificant and does not affect significantly the Mart wa WisłA river. The aim of this work was to determine the concentrations of uranium (234U, 235U, 238U), polonium (210Po) and lead (210Pb) radioisotopes in water samples and to …
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Additionally, several books published by the IAEA were used as a source of summarised data. Physico-chemical characteristics of phosphogypsum Phosphogypsum is a grey, damp, fine-grained material (silty or silty-sandy) with a maximum grain size between 0.5 and 1.0 mm and 50–75 % of particles finer than 0.075 mm ( 6 ).
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–Natural radioactivity and metals content depend on the source of rock used and the processing conditions –Consequently, care must be taken to match a given source of phosphogypsum to the appropriate end use •Use is environmentally preferable to stacking or disposal to open waters •Regulators should be encouraged to promote beneficial ...
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Therefore, phosphogypsum (PG) could be a promising amendment to reduce the salinity effect and improve soil quality in salt-affected soils. In this context, the present study aimed to evaluate the effect of PG on the physical properties of Luvisols and Cambisols collected from salt-affected soils in four regions in Morocco: Chichaoua, Ras …
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The impact of adding phosphogypsum (PG) to freshwater wetland areas, and potential effect on methane production and respiration in sediment was studied in the laboratory. ... Register to receive personalised research and resources by email. Sign me up. Taylor and Francis Group Facebook page. Taylor and Francis Group X Twitter page.
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1. Introduction. Nanoparticles (minerals, organic and/or inorganic amorphous phases, and complex mixtures) are of great environmental relevance with respect to the life on our planet and the quality of the atmosphere (Hochella et al., 2008, 2019).Nanoparticles (NPs) are global carriers of minor elements (both nutrients and toxins) and play an …
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Abundant of research investigations have been conducted to utilized the waste or chemical gypsum, phosphogypsum for various applications. Most of the research investigations were carried out by purifying phosphogypsum for the impurities present in it and then its utilization were suggested. In another research approach phosphogypsum could be …
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An experiment with the objective of evaluating performance of phosphogypsum as nutrient source in groundnut was conducted at Zonal Agricultural Research Station (ZARS), Gandhi Krishi Vignana Kendra (GKVK), University of Agricultural Sciences (UAS), Bangalore, in the Eastern Dry Zone (Zone - V) of Karnataka with a …
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Semantic Scholar extracted view of "The using of waste phosphogypsum and natural gypsum in adobe stabilization" by N. Değirmenci ... (artificial pozzolan) on the swelling potential of an expansive soil from Oman. A. Al-Rawas A. Hago Hilal Al-Sarmi. Environmental Science, Engineering. 2005; 447. Save. UTILIZATION OF WEATHERED …
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This article reviews the physical-chemical properties and environmental impacts of phosphogypsum (PG), a byproduct from phosphate fertilizer production. It also discusses the challenges and opportunities of PG reuse and management in a circular …
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Phosphogypsum, a waste product from manufacturing fertilizer, emits radon, a radioactive gas. It also contains the radioactive elements uranium, thorium and radium. ... Source: U.S. Department of Agriculture (USDA) The waste that is created during fertilizer production is stored in large piles called stacks. Some stacks cover hundreds of …
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Phosphogypsum (PG) is a by-product of phosphate fertilizer production that contains radioactive and hazardous elements. This review evaluates the geochemical …
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Phosphogypsum is a by-product originated from wet-process phosphoric acid, which contains some impurities such as soluble phosphorus, soluble fluorine, some salts, heavy metals and organic compounds, which lead to difficulty to be used. Jillion phosphogypsum accumulated not only occupies land, pollutes the circ。umjacent …
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The Ca source in PG can be decomposed at high temperature to prepare CaO [187], [188]. CaO prepared from PG was used as cement clinker in construction industry [129], [189], [190], [191]. The study of the traditional method for the decomposition of PG yielded the following findings. ... Due to the presence of other impurities in phosphogypsum ...
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Phosphatic clay was a good source of potassium and magnesium, and dolomitic limestone was a good source of magnesium. In field experiments, one ton per acre of dolomitic limestone, or a two inch layer of sand tailings or overburden, applied to the surface of phosphogypsum and rototilled, enhanced plant establishment. ... Vegetation cover on ...
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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 (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 ...
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Phosphogypsum, which has many useful elements, is thus being considered as a source of calcium, phosphorus, rare-earth elements, and trace elements, among other, as well as a mineral …
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Phosphogypsum disposal was a very simple matter in the early days of the industry. If at all possible, you located your plant near the ocean or on a river and dumped the phosphogypsum into the sea or the river. If you were foolish enough to locate where water disposal was not possible, you suffered the economic penalty of having to stack the ...
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Phosphogypsum is a radioactive waste from phosphate ore processing. Learn about the EPA's regulations, the approved and pending uses of …
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1. Introduction. Phosphogypsum (PG), a significant Technologically Enhanced Naturally Occurring Radioactive Material (TENORM) (IAEA, 2003), is a by-product of phosphoric acid production from rock phosphate – a process that underpins inorganic P fertiliser production for agriculture.Global food production is currently …
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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) samples from four distinct sources in the Southeastern US were analyzed to explore the variation in total metal content between newly generated (fresh) PG and PG disposed of in phosphogypsum stacks for different lengths of time (stack). Fresh PG exhibited greater total metal conce …
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