Phosphogypsum, as a byproduct of wet-process phosphoric acid reaction, has caused many environmental pollution problems. To improve the property and purity of phosphogypsum in the wet-process phosphoric …
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Application of phosphogypsum in soilization: a review J. Qi1,2 · H. Zhu1,2 · P. Zhou1,2 · X. Wang1,2 · Z. Wang1,2 · S. Yang1,2 · D. Yang1,2 · B. Li1,2,3 Received: 24 April 2022 / Revised: 21 November 2022 / Accepted: 13 January 2023 / Published online: 1 February 2023 ... Kunming University of Science and Technology, Kunming 650500 ...
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The phosphogypsum (PG) stockpile in Yunnan, China, is one of the largest accumulations of PG. Our group has focused on the application of chemical looping gasification (CLG) with a PG oxygen carrier characterized by high silicon content. FactSage 7.1 software was used for the thermodynamic simulation analysis of the reaction …
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Experimental Study on Phosphogypsum Desilication by Flotation[J]. Multipurpose Utilization of Mineral Resources, 2014, (6): 39-42. doi: 10.3969/j.issn.1000-6532.2014.06.010. Zhu Pengcheng, Wang Guodong, Zeng Bo. Experimental Study on Phosphogypsum Desilication by Flotation[J].
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Concentration and fraction distribution of organics and heavy metals in municipal sludge treated by modified phosphogypsum and acetic acid (signed as MPG/HAC) were studied. ... Kunming University of Science and Technology, Kunming, 650500, Yunnan, China. Electronic address: lipingma_kmust@163.
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Fig. 3 shows the FT-IR spectra of the PG sample. In the FT-IR spectra, the presence of water was confirmed by the characteristic transmission bands in the 3750–3250 and 1750–1500 cm −1 regions. The bands in the 1250–1000 and 750–500 cm −1 regions were assigned as v 3 SO 4 2-and v 4 SO 4 2-, respectively [35], [40].The band at 839 …
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Alawi Zawawi, Vice Chairman of USG Boral Zawawi Gypsum, a leading player in the export of natural gypsum, said that Oman has the potential to export cumulatively total more than 300 million tonnes over the next 15 years (2018-2032), going by current trends. At an average Export FOB price of $18 per tonne, this could generate …
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Utilizing phosphogypsum in the production of phosphogypsum-based construction materials and its application in the construction industry is a crucial approach to address the resource utilization ...
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As a typical solid waste, phosphogypsum (PG) is the by-product generated during the exploitation of phosphate resources 1,2,3. Global production of PG is estimated to be around 100–280 Mt ...
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Nearly 300 million t of phosphogypsum (PG) are produced every year as a byproduct from phosphate fertilizer production worldwide. Approximately 58% of the PG …
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The effects of washing method, lime neutralization, flotation method and microwave method of different pretreatment process of Yunnan phosphorus building gypsum strength and crystal morphology. Through, a lot of experiments comparing the four kinds of pretreatment effect, the results show that: after four pretreatment of phosphogypsum are basically …
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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 phosphogypsum waste used in the experiment was taken from Kunming, Yunnan province in China. As shown in Figure1, the initial water content of the material is high,
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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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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 …
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The phosphogypsum valorization became a necessity when the U.S. Environmental Protection Agency (EPA) legislation was modified in 1992 and allowed …
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A variety of co-existing impurities in phosphogypsum limit its large-scale and high-value utilization. This paper summarizes the common contents of major impurity components (silicon and phosphorus) and trace impurity components (fluorine, iron, aluminum, and carbon) in phosphogypsum and discusses the harm of impurity …
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Phosphogypsum (PG) is an industrial solid waste produced during the production of phosphoric acid through the wet process [].In 2021, the newly increased production of PG was estimated to be 80 million tons and the cumulative stacking capacity was up to 800 million tons [].The continuous dissolution of phosphorus and fluorine …
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In this study, phosphogypsum (PG) is simulated by doping fluorine and phosphorus ions in an analytically pure reagent of gypsum dihydrate. The influence of fluorine and phosphorus impurity and content on the dehydration reaction process of phosphogypsum and its crystalline micromorphology is assessed during the …
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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 …
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The aggregate production in Yunnan, Guizhou, Sichuan and Hubei provinces was 12.53 Mt, accounting for 73.3% of the total production. The production in these provinces increased by 3.2% compared to ...
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Kunming University of Science and Technology, Faculty of Environmental Science and Engineering, 650500 Kunming, China. Search for more papers by this author. ... This comprehensive review on thermodynamic analysis in phosphogypsum resource utilization for the mentioned products is valuable for academicians, scientists, and …
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The characterization and leaching mechanism of REEs from phosphogypsum (PG) in HCl was studied in-depth. REEs contained in the PG were 208 ppm, of which Y, La, Ce, and Nd were the four most abundant elements. The modes of occurrence of rare earth elements (REEs) in the PG were quantified using the sequential …
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Phosphogypsum (PG) treatment is one of the research hotspots in the field of environmental protection. Many researchers both at home and abroad have devoted themselves to studies on harmless resource treatment of PG, but the treatment technology is unable to meet the demand of PG consumption due to the huge production and …
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Phosphogypsum (PG) is a solid by-product generated in the production of phosphoric acid (PA) using conventional synthesis methods. The raw material, about 50 times more radioactive as compared to unperturbed soils, is dissolved in diluted sulfuric acid (70%) forming PG and PA. The majority of both, reactive hazardous elements and natural ...
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Phosphogypsum (PG) is a hazardous industrial solid waste product from the wet phosphate industry 1,2.The widespread deposition of that fine, light- to dark-grey, …
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The hydration of hemihydrate phosphogypsum in the alkaline environment was investigated aiming to recycle phosphogypsum-a promising gypsum resource in gypsum-based materials that generally ...
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1 Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China. ... to transfer heat and oxygen to the fuel. In this work, we used phosphogypsum (PG) as the oxygen carrier in CLG with lignite fuel. Based on experimental and density functional theory (DFT) theoretical …
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R & D Center, Yunnan Yuntianhua Co., Ltd., Kunming 650228, China e-mail: hang.ma@yprtec Z. Zhenhuan Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650504, China ... Phosphogypsum: Phosphogypsum from a chemical plant in Yunnan, the analyt-ical results are shown in Table 16.1. 2. Cement: …
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Phosphogypsum (PG) is a solid waste produced from decomposition of phosphate rock in sulfuric acid. It can improve the physicochemical properties of soil. …
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