In foreign practice, technologies for the conversion of phosphogypsum into ammonium sulfate and calcium carbonate developed by OSAG (Austria), FACT (India), Marubeni …
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The phosphoric acid wet process waste stream provided the phosphogypsum (PG). Phosphogypsum waste is environmentally harmful and …
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Ammonium sulfate is mainly used as direct fertilizer or in producing compound fertilizers. The global ammonium sulfate market is projected to grow 4% annually through 2025, from $4.6 billion to $6.8 billion. ... As global efforts to utilize more of the phosphogypsum produced in the production of phosphate fertilizers grow, the prospect of re ...
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The production of ammonium sulfate fertilizer from phosphogypsum is studied. The phosphogypsum is considered by product from extraction process of sulphoric acid. The mereseberg process is used a waste of phosphogypsum with ammonium carbonate to produce ammonium sulfate as a main product and calcium carbonate as a byproduct. …
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[108,109] PG as a raw material for the production of chemicals Ammonium sulfate [(NH 4 ) 2 SO 4 ... The production of potassium sulfate from phosphogypsum and potassium chloride in the presence of ...
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Phosphogypsum Two-Step Ammonia-Carbonation Resulting in Ammonium Sulfate and Calcium Carbonate Synthesis: Effect of the Molar Ratio OH−/Ca2+ on the Conversion Process. We describe herein a detailed study on the effect of molar ratio MR = n …
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Introduction. Phosphogypsum (PG) is a waste material generated during production of phosphoric acid (H 3 PO 4) from phosphate rock rich in apatite [Ca 5 (PO 4) 3 OH] via reaction with sulfuric acid (H 2 SO 4).Chemically, PG consists primarily of calcium sulfate dihydrate, CaSO 4 ·2H 2 O (Table 1).Worldwide, 100–280 Mt/year PG is …
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The Egyptian phosphogypsum waste is treated using sulfuric acid prior the ammonium sulfate production. The relevant factors that would affect the removal efficiencies of some impurities are ...
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In foreign practice, technologies for the conversion of phosphogypsum into ammonium sulfate and calcium carbonate developed by OSAG (Austria), FACT (India), Marubeni Juda (Japan) and TVAB ... The first stage is the production of ammonium sulfate or sodium sulfate. The second stage is the production of REE concentrate. The second stage …
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The present study used the adult earthworm Aporrectodea trapezoides as a bioindicator species to look into the possible dangers of ammonium sulfate (AS) fertilizer. Two complementary toxicity tests were conducted to determine the LC50values, growth rate inhibition, morphological alterations, and histopathological texture of worms. The lethality …
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Ammonium sulfate is also used in preparation of other ammonium salts and food additive. In biochemistry its precipitation is a common method for purifying proteins [17]. So, the present work aims to use the phosphogypsum waste for preparing both hydroxyapatite nano-crystalline powder and ammonium sulfate at room temperature.
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The treatment process of the phosphogypsum waste is the most important method for the removal of the associated impurities which are contaminating the …
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The obtained precipitate is the highly purified phosphogypsum which is used to obtain the highly purified ammonium sulfate fertilizer, the preparation of ammonium sulfate process is applied using the suspended of 500 g purified phosphogypsum which is contained 410.6 g calcium sulfate in 2 L of 3% ammonium sulfate solution (as …
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The PG conversion by ammonium carbonate ((NH4)2CO3) into calcium carbonate (CaCO3) and ammonium sulfate ((NH4)2SO4) is classifying in the top of the PG conversion and it's known generally by the ...
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The Egyptian phosphogypsum waste is treated using sulfuric acid prior the ammonium sulfate production. The relevant factors that would affect the removal efficiencies of some impurities are ...
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6. Textile Industry: Ammonium sulfate is utilized in the textile sector for various processes. Textile Dyeing: It is used as a mordant in textile dyeing processes to improve the fixation of dyes on fibers. Synthetic Fiber Production: Ammonium sulfate is used in the production of synthetic fibers like nylon. 7.
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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. …
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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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Eng. & Tech. Journal, Vol.29, No.4, 2011 Study on The Production of Ammonium Sulfate Fertlizer From Phosphogypsum 816 chemical properties for production ammonium sulfate and comparative with Egyptian result. Description of The Merseberg Process The manufacture of ammonium sulfate, (NH 4)2S0 4, from gypsum (or
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Urease-producing L. sphaericus strain GUMP2 could be used to remove the hazardous phosphogypsum from the environment by converting it to the industrially useful CaCO 3 and ammonium sulfate, a valuable agricultural fertilizer. This novel and sustainable approach could be a promising solution for the hazardous phosphogypsum in the …
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Production of Useful Carbonate and Sulfate Salts. Front. Energy Res. 3:48. doi: 10.3389/fenrg.2015.00048 Mineral carbonation of Phosphogypsum Waste for Production of Useful carbonate and sulfate salts Hannu-Petteri Mattila* and Ron Zevenhoven Thermal and Flow Engineering Laboratory, Åbo Akademi University, Turku, Finland …
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of calcium sulfate to ammonium sulfate using ammo - nium carbonate aqueous solution [8]: CaSO 4·2H 2O+(NH 4) 2CO 3→ →CaCO 3+(NH 4) 2SO 4+2H 2O Bani-Kananeh et al. present results concerning the production of potassium sulfate by the double de-composition reaction of potassium chloride and phosphogypsum in aqueous ammonia …
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In both 20-day cultures, increases in sulfide ions were found, accompanied by a 50% reduction of sulfate in 5 g L 1 phosphogypsum. 3.2. Optimal concentration of phosphogypsum as sulfate source Fig. 3 shows the effect of phosphogypsum concentration on growth and sulfide production by the mixed culture of sulfate …
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In this process, the attack of 2 tons of PR with sulfuric acid (H 2 SO 4) produces about 1 ton of phosphoric acid (H 3 PO 4) and 5 tons of calcium sulfate dihydrate (CaSO 4 ·2H 2 O) known as phosphogypsum waste (PG) [].Annually, the current production of PG worldwide is more than 250 million tons [].In Morocco, it exceeds 25 …
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Production of potassium sulfate from potassium hydrosulfate solutions using alcohols. Chem Pap, 62 (1) (2008) ... Radionuclide flow during the conversion of phosphogypsum to ammonium sulfate. J Environ Radioact, 32 (1–2) (1996), pp. 33-51, 10.1016/0265-931X(95)00078-O. View PDF View article View in Scopus Google Scholar
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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 between 100 to 300 Mt ...
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The phosphogypsum is considered by product from extraction process of sulphoric acid. The mereseberg process is used a waste of phosphogypsum with ammonium …
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DOI: 10.1080/00084433.2024.2305998 Corpus ID: 267465137; The employing of pure calcium sulfate extracted from phosphogypsum for composing highly pure ammonium sulfate and calcium carbonate
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ity of gypsum in 0–30 mass% nitric acid solutions at 20°C was also studied [18]. The solubility of calcium sulfate dehydrate in HCl-CaCl 2 solutions was determined by Li and Demopoulos [19].
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Two synthesis methods were used for the conversion of phosphogypsum to ammonium sulfate and calcium carbonate: (i) Two-step method: it consists of reacting …
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The Egyptian phosphogypsum waste is treated using sulfuric acid prior the ammonium sulfate production. The relevant factors that would affect the removal efficiencies of some impurities are ...
WhatsApp: +86 18221755073
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 …
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