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DOI: 10.1016/j.jenvman.2023.119869 Corpus ID: 266525690; Simplification of the pretreatment method for phosphate oxygen isotope measurement in phosphogypsum leachate. @article{Xie2023SimplificationOT, title={Simplification of the pretreatment method for phosphate oxygen isotope measurement in phosphogypsum …
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Phosphogypsum (PG) is reused as aggregate in the cemented backfill, which effectively improves the PG reutilization efficiency.
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Phosphogypsum (PG) is a byproduct of the wet manufacturing process for phosphoric acid and is considered an industrial waste material. Around 5 tonnes of PG are generated for every 1 tonne of phosphoric acid production [1].As the phosphorus chemical sector has expanded rapidly in countries like the Middle East, Africa, Russia, the United …
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1. Introduction. Phosphogypsum (PG) is a bulk industrial solid waste of wet-process phosphoric acid production. Every ton of phosphoric acid production generates as many as 4–6 tons of PG, including more than 90% of CaSO 4 ·2H 2 O, a small amount of phosphorus, fluorine, organic matter, oxides, heavy metals, radioactive substances …
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Phosphogypsum (PG) is a by-product of phosphoric acid production from phosphate rocks, containing radioactive elements and impurities. This review examines …
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DOI: 10.1016/j.conbuildmat.2022.129631 Corpus ID: 253657231; Effect of oxalic acid pretreatment on the mechanical properties and microstructure of phosphogypsum @article{Zhang2023EffectOO, title={Effect of oxalic acid pretreatment on the mechanical properties and microstructure of phosphogypsum}, author={Wenyan …
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Using phosphogypsum (PG) as the aggregate of cemented backfill is an economical and effective method of PG utilization. However, the stability and performance of cemented backfill are challenged by the rich fluoride content in PG. In this study, the effects of citric acid pretreatment on PG defluorination, backfill performance and …
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Phosphogypsum composition after pretreatment3.1.1. Chemical components. As shown in Table 3 and Fig. 1, the PG without pretreatment contains 0.934 % P 2 O 5. CaHPO 4 ·2H 2 O solid solutions can …
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Phosphoric acid manufacturing generates large amounts of phosphogypsum (PG); a by-product generally disposed in the surface or evacuated in the seawater without any pretreatment. Phosphogypsum may host non-negligible amounts of valuable elements such as rare earth elements (REEs), which are critical elements on …
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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 …
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Phosphogypsum (PG) accumulation occupies huge amounts of land resources and results in serious environmental risks. A new recycling product, the phosphogypsum embedded filler (PGEF) made with calcination-modified phosphogypsum, was developed. The preparation process, hydration mechanism of …
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1. Introduction. Large amount of sewage sludge generated from the urban waste water treatment plants (WWTP) has had a great impact on the environment due to the defects of sludge in subsequent utilization (Chen, 2013).Meanwhile, transport of bulk sludge has caused serious economic burden because of the higher water content of …
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Significant environmental issues are raised by the phosphogypsum (PG) waste that is being produced. In Lithuania, about 1,500,000 tons of PG waste is generated yearly, and about 300 Mt is generated yearly worldwide. A by-product of burning wood biomass in thermal power plants is biomass fly ash (BFA). By 2035, compared to 2008 …
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In landfills for phosphogypsum disposal, a large volume of leachate wastewater generated by the residual process water and by the rainfall percolation through the solid material must be managed. The leachate shall be properly treated before its discharge to surface water or its reuse; it has a very low pH and high concentrations of …
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In this study, five different pretreatment methods were proposed for comparative analysis to examine the pretreatment effect on the mechanical and environmental behaviors of ternary phosphogypsum ...
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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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A new building filling materials (NBFM) using phosphogypsum and municipal solid waste incineration (MSWI) fly ash is prepared in this paper. The effects of MSWI fly ash dosage and MSWI fly ash ...
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In-situ remediating phosphogypsum (PG) for cemented paste backfill (CPB) in the contaminated site is economic management for promoting sustainable developments in the phosphate industry. This study concerns the combined use of NaOH pretreatment and ground-granulated blast furnace slag (GGBFS) additi …
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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 comprehensive utilization of phosphogypsum was described, and the mechanism of phosphogypsum producing cement, preparing …
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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 phosphoric acid production, where worldwide PG generation exceeds 300 million tons annually. The vast majority of produced PG is discarded …
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DOI: 10.1016/j.cscm.2023.e01954 Corpus ID: 257190352; Phosphogypsum pretreatment with CaCO3 to improve the backfill performance @article{Shi2023PhosphogypsumPW, title={Phosphogypsum pretreatment with CaCO3 to improve the backfill performance}, author={Ying Shi and Yanmei Song and Chendi Min and Jing Du and Xiaolin Wang and …
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A new method of pretreating acidic phosphogypsum (APG) with neutral salt (CaCO 3). CaCO 3 effectively neutralized the residual acid and precipitated impurity in …
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The accumulation of original phosphogypsum (OPG) has occupied considerable land resources, which have induced significant environmental problems worldwide. ... Yong R., Karstensen K.H. Characterization of heavy metals and PCDD/Fs from water-washing pretreatment and a cement kiln co-processing municipal solid …
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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, powder with a slight odor and ...
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DOI: 10.1016/j.cscm.2020.e00400 Corpus ID: 225020486; Research on the pretreatment and mechanical performance of undisturbed phosphogypsum @article{Zhang2020ResearchOT, title={Research on the pretreatment and mechanical performance of undisturbed phosphogypsum}, author={Lin-chun Zhang and Ai-lian …
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Florida Gov. Ron DeSantis recently signed a bill that will allow the Florida Department of Transportation to study the use of phosphogypsum in road construction. This came after a longstanding federal-level prohibition on using phosphogypsum, which was repealed by then-President Donald Trump's Environmental Protection Agency (EPA) in October …
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In-situ remediating phosphogypsum (PG) for cemented paste backfill (CPB) in the contaminated site is economic management for promoting sustainable developments …
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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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In the laboratory, seven column experiments were built to treat phosphogypsum leachates (see Fig. 1).The systems consisted of 5-L storage tanks connected to a peristaltic pump that conducted the phosphogypsum input water with a constant flow rate of 0.3 mL/min to the top of the reactive columns (40 cm in length and …
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This study contributes to sustainable construction practices by exploring the use of phosphogypsum, a commonly discarded byproduct, in the production of recycled …
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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 are stacked, 28% are discharged in coastal waters and only 14% are further processed. This critical review provides an overview of the physical-chemical properties of PG produced …
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Modified phosphogypsum (MPG) was developed to improve dewaterability of sewage sludge, and dewatering performance, properties of treated sludge, composition and morphology distribution of EPS, dynamic analysis and multiple regression model on bound water release were investigated. ... bound water release and dewatering …
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Rashad A.M. Potential use of phosphogypsum in alkali-activated fly ash under the effects of elevated temperatures and thermal shock cycles. J. Clean. Prod. 2015; 87:717–725. [Google Scholar] Reijnders L. Cleaner phosphogypsum, coal combustion ashes and waste incineration ashes for application in building materials: a review. Build. …
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1. Introduction. Phosphogypsum (PG), as a solid waste generated in the process of the phosphorus fertilizer industry (phosphoric acid production), has an annual global output of 280 million tons, and China's annual output is about 55 million tons [1,2,3].However, most PG is deposited without any treatment near the production sites or stockpiled at the …
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The prospect of comprehensive utilization of phosphogypsum is broad, but there are still many aspects that need to be studied. It is necessary to speed up the …
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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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