Mosiac plan to reuse phosphogypsum in road …
Phosphogypsum. Mosaic wants to use phosphogypsum in road construction Mosaic is backing bills that would allow the use of the mildly radioactive fertilizer waste, which emits radon gas, in road ...
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Comet Tsuchinshan-ATLAS: where did it come from and …
Comet Tsuchinshan-ATLAS: where did it come from and where is it going? Jason E. Ybarra | Friday, October 11, 2024. In a few days, comet Tsuchinshan-ATLAS (C/2023 A3) is expected to be visible to the naked eye right after sunset. As it moves away from the Sun, it will pass by the Earth on October 12, although at its closest approach it will be ...
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Zucchini History
Zucchini History - Origins of Zucchini . Zucchini (or courgette) is a summer squash which means that it is a squash that is harvested while immature and in the state while its rind is still tender and edible. Its skin is dark green, light green orange or deep yellow. Botanically Zucchini is a fruit, but it is treated as a vegetable in a culinary context and is often cooked and prepared …
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Effect of graphene oxide on hydration and performance of phosphogypsum …
It has been reported that materials which can be used to increase the thermal conductivity of cement-based or gypsum-based materials mainly include carbon-based materials such as graphite powder, carbon fiber, graphene oxide (GO) and carbon nanotubes [7], [8], [9], [10].Among them, GO is a novel thermal and electrical conductive functional material, which …
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Leaching behavior and release mechanism of pollutants from …
Phosphogypsum (PG) is an acidic industrial solid waste generated as the byproduct during the production of phosphoric acid and phosphate fertilizers (Wu et al. 2022a).The main component of PG is dihydrate calcium sulfate (CaSO 4 ·2H 2 O), while impurities include undecomposed phosphorus ore, residual acid solution, silicon dioxide, soluble phosphorus, soluble fluoride, …
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Leaching of rare earth elements (REEs) and impurities …
1 1 Leaching of rare earth elements (REEs) and impurities from phosphogypsum: a 2 preliminary insight for further recovery of critical raw materials. 3 4 C.R Cánovasa,b*, S. Chapronb, G. Arrachartb, S. Pellet-Rostaingb 5 aDepartment of Earth Sciences & Research Center on Natural Resources, Health and 6 the Environment. University of Huelva, Campus …
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Raman spectroscopic study of phosphogypsum thermal …
Elemental sulphur (S) can be produced from hydrogen sulphide (H 2 S) in a PiPco or Iron process. In turn H 2 S can be stripped with carbon dioxide (CO 2) from calcium sulphide (CaS) obtained from the thermal reduction of phosphogypsum with carbon.The reaction pathway for the thermal reduction of the phosphogypsum with graphite was studied using …
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Phosphate and How Florida Was Formed
Radiation and Phosphogypsum; Radiation and Phosphoric Acid; Radioactivity and Phosphatic Clay Ponds; Phosphate Companies and EPA's Toxic Release Inventory; 6 – Environment and Health. Phosphogypsum Stacks; Back to top. 1855 West Main Street. Bartow, Florida USA 33830. 863-583-9094. twitter; instagram; linkedin; youtube; giphy;
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Phosphogypsum stacks, toxic ponds, leaks and spills
The immediate plan seems to be to pump out the waste water sitting in the pond above the phosphogypsum stack into Tampa bay, untreated. ... elements and the water in the pond does not come in ...
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Radioactive Material From Fertilizer Production
Phosphate rock contains small amounts of naturally-occurring radionuclides, mostly uranium and radium. When processing phosphate rock to make fertilizer, the phosphorous is removed by dissolving the rock in an acidic …
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Killing taxes on tips sounds good, but experts say it doesn't …
Where did the idea come from? Trump raised the idea to end taxing tips at a June campaign rally in Las Vegas, home to the Culinary Workers' Union.
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Properties, Purification, and Applications of Phosphogypsum: …
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H 3 PO 4) production from natural phosphate rocks. Approximately 4–6 …
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Jianwu Zhang *, Xiao Wang, Pengtao Hou, Biao Jin, …
impurities contained in phosphogypsum. The soluble P2O5 impurities in phosphogypsum mainly come from residual phosphoric acid (H3PO4), which mainly exists in the form of H3PO4, H2PO4 and HPO 4 2 ...
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Public Comment Sought on Radioactive Road Pilot
"Mosaic is claiming this is a small pilot study that is needed to further the science of phosphogypsum in roads and yet Mosaic is the one doing it," said Whitlock. "This is industry …
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Sulfuric Acid Leaching Recovery of Rare Earth Elements from …
Rare earth elements (REEs) are considered vital raw materials for the economy and are on the European Union's list of critical raw materials (CRMs). Europe is mainly dependent on REE imports. This dependence could be reduced if locally available primary or secondary resources would be processed. In Poland, there are, for instance, over 5 million metric tons of …
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Does phosphogypsum application affect salts, nutrients, …
A pot experiment was undertaken, to evaluate the effect of Phosphogypsum (PG) and Gypsum (G), to remove salts, nutrients and trace elements in leached water ... The amendment application did not affect saturation index (SI) of the main minerals. However, water passing through the soil increased the SI. which could result in groundwater mineral ...
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Conversion of Phosphogypsum into Porous …
The discharge of lead and cadmium wastewater, along with the pollution caused by phosphogypsum, represents a particularly urgent environmental issue. This study employed a straightforward hydrothermal …
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Sulfuric Acid from Phosphogypsum, DMC-FIPR Process
Current established technology for making sulfuric acid (H 2 SO 4) and cement clinker by-product from phosphogypsum (such as the OSW process developed by Chemie Linz, Austria) is not economic when compared with sulfur burning.It has only been applied in a few locations (Austria, China, and South Africa) where special circumstances prevail.
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Phosphogypsum Stacks
Phosphogypsum Stacks. America is blessed with abundant low-cost natural gypsum. There is also an abundance of flue gas desulfurization gypsum produced as a by-product of coal-fired power plants. As a result, the market for the phosphogypsum generated by the chemical processing of phosphate rock has traditionally been limited. ...
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Highly efficient recovery of phosphate and fluoride from phosphogypsum …
Phosphogypsum is a by-product formed in the production of phosphoric acid, so residual phosphoric acid, sulfuric acid, and hydrogen fluoride existed in phosphogypsum (Contreras et al., 2015). When phosphogypsum is leached with deionized water at pH 2.0–10.0, the final leachate pH was always between 2.0 and 4.0.
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The treatment of phosphogypsum leachate is more urgent …
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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Phosphogypsum
Phosphogypsum (PG) is a waste by-product from the processing of phosphate rock by the "wet acid method" of fertiliser production, which currently accounts for over 90% of phosphoric acid …
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A novel phosphogypsum based self-produced gas …
Phosphogypsum is a by-product waste residue produced in the preparation of phosphoric acid in industrial production. In the process of wet phosphoric acid production, for every 1 t of phosphoric acid produced, 5 t of ... The expansion multiple of the slurry basically did not change when the content of phosphogypsum is greater than 56 wt%. ...
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The Latest: Residents begin repairing damage from …
The Mosaic Company said in a media release that heavy rains from the storm overwhelmed a collection system at its Riverview site, pushing excess water out of a manhole and into discharges that ...
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Carbonation behavior of solidified/stabilized cadmium in phosphogypsum …
Environmental contamination from heavy metals poses significant risks to both ecosystems and human health [1].Notable heavy metals like lead, mercury, cadmium, and chromium primarily originated from industrial waste, smelting, and coal combustion processes [2].These toxic elements exhibit remarkable stability in soil, water, and the atmosphere, …
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Application of phosphogypsum and phosphate-solubilizing …
Phosphogypsum (PG) is a by-product of phosphate fertilizer industry worldwide (Chernysh et al., 2021).It was estimated that five tons of PG would be produced for the production of one ton of phosphoric acid (Papastefanou et al., 2006).The storage of PG in China has exceeded 400 million tons, and global storage has exceeded 6 billion tons (Wang et al., 2020).
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Modification mechanism, heavy metal coupling and …
Few researches on high efficiency modified phosphogypsum (MPG) and its resource utilization in bulding materials. This article investigated the effects of different lower temperatures and drying times on the thermodynamic modification mechanism of macroscopic performance and microscopic structure of MPG, and investigates its application in …
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The Latest: Residents begin repairing damage from …
Phosphogypsum may also contain toxic heavy metals and other carcinogens, such as arsenic, cadmium, chromium, lead, mercury and nickel. Mosaic said the volume of the spill likely exceeded a 17,500-gallon (66,245-litre) minimum reporting standard, though it did not provide a figure for what the total volume might have been.
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Phosphogypsum: potential uses and problems – a …
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.
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Phosphogypsum circular economy …
Nearly 300 million t of phosphogypsum (PG) are produced every year as a byproduct from phosphate fertilizer production worldwide. Approximately 58% of the PG are stacked, 28% are discharged in ...
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