Phosphogypsum: potential uses and problems – a …
PG, discharged into the sea, watercourses or in wilderness stocks, contains toxic elements harmful to ecosystems and human health, including heavy metals and radionuclides, and there is therefore a concern regarding …
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A review on the environmental impact of phosphogypsum …
•. Numerous anthropogenic and natural nanoparticles were documented in phosphogypsum. •. The environmental and human health effects of nanoparticles are …
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Reuse of phosphogypsum pretreated with water washing as …
Next, the backfill slurry was injected into plastic molds with internal dimensions of 40 × 40 × 40 mm. There was a 0.2 mm small hole at the bottom of the mold to drain the excess water in the ...
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Radon exhalation from phosphogypsum building boards: …
Comprehensive understanding of (222)Rn exhalation from phosphogypsum-bearing building material and its accumulation in indoor air is likely to rely on numerical simulation, particularly if ...
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Internal Wall Insulation: The Complete Guide | Homebuilding
Kingspan's solid board internal wall insulation is an insulated plasterboard with a thermal conductivity of 0.018 W/mK. (Image credit: Kingspan) It has been well established that improving airtightness has a greater impact on heat loss than insulation. The solid elements of the wall will naturally be fairly airtight — but it is the gaps, cracks and penetrations that can be …
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Refinement of waste phosphogypsum from Prahovo, Serbia
Two samples collected from the phosphogypsum deposits of the chemical products industry Elixir Prahovo (Serbia) were subjected to a recrystallization experiment performed over several repeated cycles.
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Assessment Of Natural Radioactivity Concentration and …
Estimated radiological hazard indices showed that the mean values of Radium Equivalent, External and Internal Hazards, Absorbed dose rate, Annual Effective Dose, Excess lifetime cancer risk and ...
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Phosphogypsum: Properties and Potential Use in …
acid, 4–5 tons of phosphogypsum are produced (El Issiouy et al. 2013; Papastefanou et al. 2006). Currently, between 3 and 4 billion tons of phosphogypsum have been produced, with an annual rise of 300 million tons (Cuadri et al. 2021). The question of considering phosphogypsum as a waste or a resource has been
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Properties, Purification, and Applications of Phosphogypsum: …
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 …
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Recycling phosphogypsum in road construction materials …
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. Environ.
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Dynamic of Heavy Metals and Environmental Impact of …
This paper offers a database on the distribution of heavy metals in phosphogypsum and their leaching as a first step towards modulating its behavior. Physical, …
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Assessment of Natural Radioactivity in Phosphogypsum …
The internal hazard index was employed to evaluate the internal exposure to 222Rn and its daughter products, and its estimation was conducted using the following equation (Morsy et al. 2012): H in ¼ A Ra 185 þ A Th 259 þ A K 4810 ð6Þ Both indices must have a value below unity to maintain the risk at a negligible level. This threshold ...
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Radiochemical Characterization of Phosphogypsum for …
Marine Pollution Bulletin, 2019. This work is a first contribution to the knowledge of natural radionuclides (226Ra, 238U, 40K, and 232Th) activities in phosphate rock (NORM), phosphogypsum, and phosphogypsum (TENORM) from the coastal fertilizer plants of Gabes (Southeastern Tunisia) and the assessment of their radiation hazards on human health …
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Reaction characteristics and kinetics of phosphogypsum …
Large-area stacking of solid waste phosphogypsum (PG) and coal gangue (CG) poses environmental contamination hazards. This work presents the reaction characteristics, thermal decomposition behavior and reaction kinetics of composite reducing agent on PG decomposition. The results show that the composite reducing agent of CG and coke can …
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Production Waste Management: Qualitative and Quantitative
Phosphogypsum (PG: CaSO4·2H2O) is a waste product (or by-product) from the production of phosphoric acid, the main component in the production of concentrated simple and complex fertilizers.
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Preparation of high-performance lightweight materials …
Phosphogypsum (PG) is a typical byproduct of the phosphate fertilizer industry's sulfuric acid-process phosphoric acid production. The global annual production of PG is about 250 million tons, of which China's production exceeds 80 million tons (Zhang et al., 2018; Fornés et al., 2021).At present, the majority of PG is stockpiling in slag yards.
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(PDF) Correction to: Phosphate, phosphoric acid and phosphogypsum …
The internal and external hazard index has been determined where the internal hazard index was 0.013-0.023 while the external hazard index was 0.006-0.012 which is below the maximum hazard index ...
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Sustainable Utilization of Phosphogypsum in Multi-Solid …
This study contributes to sustainable construction practices by exploring the use of phosphogypsum, a commonly discarded byproduct, in the production of recycled aggregates. Addressing both environmental and economic aspects of sustainability, we investigate the feasibility of employing phosphogypsum as a primary raw material, in collaboration with …
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Phosphogypsum: potential uses and problems – a …
and the suggested way to value the high amount of phosphogypsum produced. Physico-chemical properties of PG Phosphogypsum is a grey, damp, fine grained powder, silt or silty-sand material with a max -
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Phosphogypsum as a construction material
Phosphogypsum (PG) is a by-product from the industry of phosphate fertilizer. PG can be reused as a construction material. Including PG in the matrix reduced its …
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Phosphogypsum
In addition to radionuclides, phosphogypsum contains some trace contaminants which may pose health and environmental hazards, such as arsenic, lead, cadmium, chromium, fluorine, …
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Realising the circular phosphorus economy delivers for …
Husein Malkawi, D. A., Husein Malkawi, A. I. & Bani-Hani, K. A. Slope Stability Analysis for the Phosphogypsum Stockpiles: A Case Study for the Sustainable Management of the Phosphogypsum Stacks ...
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(PDF) Radiological hazard assessment for building materials
Environ Earth Sci (2014) 71:2257–2266 DOI 10.1007/s12665-013-2629-z ORIGINAL ARTICLE Radiological hazard assessment for building materials incorporating phosphogypsum made using Eshidiya mine rock in Jordan Mohammad Al-Hwaiti • Omar Al-Khashman Laila Al-Khateeb • Feras Freig • Received: 7 November 2012 / Accepted: 24 June 2013 ...
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Utilization of hemihydrate phosphogypsum for the …
DOI: 10.1016/j.conbuildmat.2019.117346 Corpus ID: 210232074; Utilization of hemihydrate phosphogypsum for the preparation of porous sound absorbing material @article{Ma2020UtilizationOH, title={Utilization of hemihydrate phosphogypsum for the preparation of porous sound absorbing material}, author={Baoguo Ma and Zihao Jin and Ying …
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Dynamic of Heavy Metals and Environmental Impact of Waste Phosphogypsum
Table 4.2 shows the trace metal contents (arsenic, silver, barium, cadmium, chromium, lead, mercury, and selenium) in (mg/kg) in some phosphogypsum sources. These elements are on the Environmental Protection Agency (EPA 1998) list of potentially toxic elements.One can see that the phosphogypsum generally has a high total content of Ag, Au, …
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Environmental impact assessment of phosphate fertilizers …
Phosphogypsum has a relatively high level of radionuclides decay product of 238 U series that induces a negative environmental impact and several limitations on the utilization of phosphogypsum waste (only 15% of the phosphogypsum waste produced is recycled in cement industries, gypsum board and agriculture) [9].The United States Environmental …
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Effective and innovative procedures to use phosphogypsum …
Phosphogypsum (PG) waste is a by-product generated from wet-process phosphoric acid (H3PO4) 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 unused PG is usually discharged into …
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Production Waste Management: Qualitative and …
Phosphogypsum (PG: CaSO4·2H2O) is a waste product (or by-product) from the production of phosphoric acid, the main component in the production of concentrated simple and complex fertilizers. The world …
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Recovery and recycling core of phosphogypsum: …
In this paper, the hazard prevention and safety risk assessment control model of PG comprehensive utilization is scientifically established from three aspects: hazard identification, risk analysis and hazard characterization, as shown in Fig. 12. Firstly, the site environment and pollutants are investigated to determine the types, distribution ...
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Phosphate, phosphoric acid and phosphogypsum natural …
The concentrations of 238U, 226Ra, 232Th and 40K maintained in phosphate rock (PR), phosphoric acid (PA) and phosphogypsum (PG) samples and its possible radiation hazards, have been measured. The radionuclides in phosphate rock have been redistributed unsymmetrically between phosphoric acid and phosphogypsum during the production …
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