##tihuan2##The use of phosphogypsum by valorization is an option. However, the high cost of purification makes it uneconomical and therefore is limited to 15% of the phosphogypsum produced globally (Maazoun and Bouassida, 2019). The remaining 85% of phosphogypsum results in continual amassing which leaves hazardous environmental …
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##tihuan2##In China, large amounts of industrial byproduct gypsum (IBG) end up as waste and excessive stockpiling due to its low whiteness and high impurity content. In this study, two typical IBG including phosphogypsum (PG) and flue gas desulfurization gypsum (FGDG) were the research object. The impurities removal and the whiteness …
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##tihuan2##DOI: 10.1016/J.CONBUILDMAT.2020.122170 Corpus ID: 233634265; Recycling flue gas desulfurisation gypsum and phosphogypsum for cemented paste backfill and its acid resistance @article{Zhang2021RecyclingFG, title={Recycling flue gas desulfurisation gypsum and phosphogypsum for cemented paste backfill and its acid …
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##tihuan2##Phosphogypsum (PG) is a by-product of phosphorus fertilizer that is typically stacked near production sites. Phosphogypsum contains trace elements and naturally occurring radioactive materials which may be hazardous to the surrounding environment. Phosphogypsum stack reclamation typically involves placing a soil cap …
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##tihuan2##This study investigated the effects of combined (mixed) application of desulfurization gypsum and biochar on crop growth and soil properties in the saline-alkali soils of coastal mudflats through indoor pot …
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##tihuan2##The effective and safe use of FGD gypsum in agricultural land is still debated in some countries even though its effectiveness in soil management has been reported in many studies.
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##tihuan2##In this study, we used thermodynamic calculations to analyze the material and energy balances of the phosphogypsum desulfurization process and to calculate the …
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##tihuan2##The synthesis of α-calcium sulfate hemihydrate (α-CSH) from flue gas desulfurization (FGD) gypsum is a good way to realize the comprehensive utilization of FGD gypsum. To obtain α-CSH with the satisfactory performances, a facile hydrothermal-aging pretreatment process for FGD gypsum raw materials was proposed, where FGD …
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##tihuan2##The U.S. EPA prohibits the use of phosphogypsum because of the radioactivity. An exception is made for phosphogypsum with an average concentration of less than 10 pCi/g radium which can be used as an agricultural amendment, but for no other use. ... There is also an abundance of flue gas desulfurization gypsum produced as a by …
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##tihuan2##This paper aims to explore the potential use of flue gas desulfurisation gypsum (FGDG) and phosphogypsum (PG) into cemented paste backfill (CPB). The …
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##tihuan2##Preparation of α-hemihydrate gypsum (α-HH) from phosphogypsum (PG) by atmospheric hydrothermal method has a good application prospect due to the mild reaction conditions, the solution medium and ...
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##tihuan2##The effective and safe use of FGD gypsum in agricultural land is still debated in some countries even though its effectiveness in soil management has been reported in many studies. Thus, the changes in the levels of soil salinity, alkalinity, crop yield, and other physicochemical properties in different soil types and crops after …
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##tihuan2##Desulfurization gypsum is a kind of solid waste with CaSO 4 ‧2H 2 O as the main component produced in the process of limestone-based flue gas desulfurization. About 100 million tons of desulfurization gypsum was produced every year in China (Wang et al., 2020). On the one hand, it has a high content of Ca 2+ and is suitable for …
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##tihuan2##However, desulfurization gypsum has some own features as relatively finer solid size (60 μm), high water content (10–15%) and impurity, these have special effect on the utilization. The desulfurization gypsum are widely utilized in cement retarder, building material, embedment and neutralizer or regulator of soil in agriculture [3, 4].
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##tihuan2##Three significant industrial gypsum by-products are flue-gas desulfurization gypsum (FGDG) [13], which is produced from coal combustion after the wet desulfurization of flue gas; phosphogypsum (PG ...
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##tihuan2##The interaction between impurities in hemihydrate PG ihydrate flue gas desulfurization gypsum and alkali is what causes the prolongation of setting time and …
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##tihuan2##DOI: 10.1016/J.RNREC.2021.105830 Corpus ID: 238659981; Reuse of phosphogypsum as hemihydrate gypsum: The negative effect and content control of H3PO4 @article{Jia2021ReuseOP, title={Reuse of phosphogypsum as hemihydrate gypsum: The negative effect and content control of H3PO4}, author={Ruiquan Jia and …
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##tihuan2##The chemical compositions of the solid materials (including phosphogypsum, gypsum concentrate, and flotation tailings) were analyzed using a Z–2000 atomic absorption spectrophotometer ( Co., Ltd., Tokyo, Japan). The mineral phase compositions of the aforementioned solid substances were examined using an …
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##tihuan2##The extensive accumulation of phosphorus slag (PS) not only occupies land but also pollutes the environment. In the present study, calcium carbide slag (CS) and desulfurization gypsum (DG) were used to synergistically activate PS, and metakaolin (MK) was added to provide additional Al 2 O 3 for the cementitious system.The setting …
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##tihuan2##Phosphogypsum is mainly produced in the USA and China. While 150 Mt of phosphogypsum is produced globally each year, only 15% of it is recycled [13]. If the total amounts of FGD gypsum and phosphogypsum were to be used for mineral carbonation, approximately 51 Mt of CO 2 could be sequestered every year. Because waste gypsum …
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##tihuan2##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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##tihuan2##The use of phosphogypsum waste in the production of building industry products, as well as for obtaining building gypsum is one of the most promising directions in the utilization of this mass ...
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##tihuan2##According to the U.S. Energy Information Administration's statistics, in the 2006–2016 period, approximately 42% of the electricity consumed in the U.S.A was produced by coal combustion (U.S. Energy Information Administration, 2018).The coal combustion process generates various types of residues such as fly ash, bottom ash, …
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##tihuan2##Semantic Scholar extracted view of "Deep removal of phosphorus and synchronous preparation of high-strength gypsum from phosphogypsum by crystal modification in NaCl-HCl solutions" by Qingjun Guan et al. ... (α-HH) whiskers provides a green alternative for the high-value-added recycling of flue gas desulfurization (FGD) …
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##tihuan2##Therefore, people have started to use flue gas desulfurization gypsum [84][85] [86] [87][88] and CDA to prepare calcium sulfate whiskers, which can solve the problem of stockpiling industrial flue ...
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##tihuan2##Like natural gypsum, the application of flue gas desulfurization gypsum (FGDG) with irrigation provides economic and environmental value (Wang and Yang, 2018; Watts and Dick, 2014). FGDG is of low cost, because it is a side product of sulfur removal from fuel combustion in coal-fired power plants and does not require mining and …
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##tihuan2##The management of solid mine waste requires a detailed characterization and a full understanding of the reparation of elements in the origin rock and their distribution in the waste matrix (Elghali et al., 2018).It is now generally acknowledged that the distribution, mobility, availability, and toxicity of chemical elements are determined not …
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##tihuan2##DOI: 10.1016/j.ijggc.2023.103843 Corpus ID: 256383669; Desulfurization gypsum carbonation for CO2 sequestration by using recyclable ammonium salt @article{Ding2023DesulfurizationGC, title={Desulfurization gypsum carbonation for CO2 sequestration by using recyclable ammonium salt}, author={Wenjin Ding and Jingyi Qiao …
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##tihuan2##Semantic Scholar extracted view of "Modified mineral carbonation of phosphogypsum for CO2 sequestration" by Ding Wenjin et al. ... As an industrial by-product of flue gas desulfurization, flue gas desulfurization gypsum (FGD gypsum), whose main component is CaSO4 · 2H2O, is an ideal raw material for mineralization.
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