The aim of this study is to give an overview and to evaluate the existing and potential uses of PG that extend from soil stabilization to cement and chemical industry …
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 …
Phosphogypsum has been widely used in the reclamation of degraded acidic soils by reducing aluminium and manganese phytotoxicity and enhancing Ca availability. Previous studies have shown that when applied superficially or incorporated, phosphogypsum mitigates the harmful effects of soil acidity on plant growth (McCray et al. 1991).
The mechanical pressing method can effectively seal the toxic and harmful substances in the waste gypsum and prevent them from releasing. ... To reduce the environmental risk of phosphogypsum lumps, the six most representative samples were selected for leaching toxicity analysis, namely: 300 MPa pressed and maintained 3 d …
Phosphogypsum (PG) is a major hazardous by-product of the phosphate industry. The whole world is facing the challenge of increasing stockpiles of PG, which …
Storage of phosphogypsum in waste heaps poses an environmental hazard, even if the facility is operated correctly. The problem of the utilization and …
This study mainly focuses on the harmless treatment of phosphogypsum, using high targeted solidification and stabilization technology to solidify and stabilize the toxic and harmful elements, with calcium carbide slag (Liu et al., 2020) or lime as the alkali-base neutralizer of phosphogypsum (Pan et al., 2020), and polymeric ferric sulfate or ...
Phosphogypsum (PG) is a radioactive industrial by-product produced in large quantities when processing phosphate ores into fertilizers. ... Phosphogypsum is usually stored in such a way that it not only occupies a large piece of land, but also leads to environmental pollution. Utilization approaches of PG are put forward in this document …
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 unp … A review on the environmental impact of phosphogypsum and potential health impacts through the release of nanoparticles ...
large land areas and cause serious environmental damage. PG is mainly composed of. gypsum but also contains a high level of impurities such as phosphates, fluorides and. …
Numerous anthropogenic and natural nanoparticles were documented in phosphogypsum. • The environmental and human health effects of nanoparticles are studied. ... Such environments often act as repositories of harmful pollutants to human health and the environment (Papaslioti et al., 2020). This is especially true for industrial …
UPDATE 04/08/2021: The immediate human threat may have passed, but the environmental threat is just rearing its head. We may no longer be looking at a catastrophic event at Piney Point, where just days ago we were facing the threat of a 400 million gallon immediate release that could have sent a 20-foot wall of toxic water …
Phosphogypsum is a waste from the phosphorus chemical industry which has certain environmental hazards. Using it as a substitute for building materials was thought to alleviate the problems of phosphogypsum pollution and natural mineral consumption. This study tried to develop an environmentally friendly phosphogypsum …
DOI: 10.17222/MIT.2018.082 Corpus ID: 105752238; Effects of impurities from phosphogypsum on the crystal growth of calcium sulfate hemihydrates @article{Tan2018EffectsOI, title={Effects of impurities from phosphogypsum on the crystal growth of calcium sulfate hemihydrates}, author={H. Tan and Faqin Dong and J. Liu and …
"That leaves Oman as the single most important source of high grade natural gypsum for cement and gypsum board manufacturers across Asia and South/East Africa," he observed. Underscoring the surging demand for Omani gypsum, Salalah Port handled a record 1.6 million tonnes of the mineral during the first two months of this year.
Phosphogypsum (PG) is a solid waste product generated during wet-process phosphoric acid production. ... A review on the environmental impact of phosphogypsum and potential health impacts through ...
Potential issues of concern resulting from phosphogypsum disposal are its environmental impacts, ... Council Directive 2013/59/Euratom of 5 December 2013 laying down basic safety standards for protection against the dangers arising from exposure to ionising radiation, and repealing Directives 89/618/Euratom, 90/641/Euratom, …
According to a 2019 report from the Fertilizer Institute, an estimated 734 million tons of phosphogypsum have accumulated in the United States — a number the industry group projected to steadily increase each year. That material sits in more than 70 similar open-air piles, which can be hundreds of feet tall and hundreds of acres wide, …
The impurities in phosphogypsum and its harm to the environment were introduced, and the advantages and disadvantages of the widely used pretreatment methods were analyzed in this paper. The application of phosphogypsum in the fields of cement retarder, building materials, agriculture, the production of sulfuric acid co …
Addressing both environmental and economic aspects of sustainability, we investigate the feasibility of employing phosphogypsum as a primary raw material, in …
DOI: 10.1016/j.conbuildmat.2022.126590 Corpus ID: 246655563; Effects of Ca(OH)2 on the early hydration, macro-performance and environmental risks of the calcined phosphogypsum @article{Cui2022EffectsOC, title={Effects of Ca(OH)2 on the early hydration, macro-performance and environmental risks of the calcined …
The transformation of phosphate ore into phosphoric acid results in the generation of high volumes of phosphogypsum (PG), an industrial by-product largely stockpiled worldwide. This solution, considered as the least damaging to the environment, constitutes a risk for the receiving environment due to the presence of harmful …
2 Executive Summary: This document details the review performed by the U.S. Environmental Protection Agency, Office of Radiation and Indoor Air, Radiation Protection Division, in response to the Radiological Risk Assessment in Support of Petition for Beneficial Use of Phosphogypsum prepared for The Fertilizer Institute (TFI) …
The accumulation of NPs and PG storage piles results in the release of harmful substances, generating numerous environmental impacts, such as contamination of the air, soil, rivers, or groundwater. Additionally, the inadequate disposal of PG waste …
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 …
Environmental investigation on the use of a phosphogypsum-based road material: Radiological and leaching assessment. Author links open overlay panel Sarra Meskini a, Issam Mechnou b, ... constitutes a risk for the receiving environment due to the presence of harmful impurities such as heavy metals and radionuclides which hinder its …
DOI: 10.1016/j.chemosphere.2021.131513 Corpus ID: 236156659; A review on the environmental impact of phosphogypsum and potential health impacts through the release of nanoparticles.
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...
The management of this "waste" presents a serious problem because of the incorporation of many impurities that could present a harmful threat to the surrounding …
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 …
The solubility of phosphogypsum and constituent contaminants, its leaching potential, acidity, combined with its poor management by the industry has caused numerous environmental disasters 149.
In 1989, stacking of phosphogypsum in the U.S. became a legal necessity when the U.S. Environmental Protection Agency (EPA) banned its use. In 1992, this rule was modified to allow the use of phosphogypsum with an average radium-226 concentration of less than 10 picocuries/gram (pCi/g) for agricultural application as a soil amendment.
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 …
Phosphogypsum (PG) wastes, including solid-state PG and liquid-state PG leachate, are industrial byproducts generated during the production of phosphoric acid. It is of great concern due to the large-scale product accumulation and environmental and geological hazards. Harmless treatment and green chemical resource utilization …
In a report with the announcement Wednesday, Wheeler noted that officials still have concerns about the potential long-term harm of phosphogypsum in roadways, but they believe it can be mitigated ...
The improper disposal of large amounts of phosphogypsum generated during the production process of the phosphorus chemical industry (PCI) still exists. The leachate formed by phosphogypsum stockpiles could pose a threat to the ecological environment and human health. Nevertheless, information regard …
The raw materials for this experiment were phosphogypsum (PG), slag, and cement. PG was supplied by Hubei Yangfeng Phosphorus Chemical Co., Ltd., which generally has a moisture content of 15 – 20%, a specific surface area of 36.99 m 2 /kg, a pH value of 2.33, a CaSO 4 ·2 H 2 O ratio of 88.17%, and a specific gravity of 2.62. To …
As a result, these wastes may be harmful to the environment and, in the long term, induce health problems to local populations. PG represents both an …
The primary environmental radiotoxic element linked to the production of phosphoric acid is uranium, which is moved from the non-mobile fraction of phosphate rock to the bioavailable fraction of PG.
Phosphogypsum (PG), the main industrial by-product of phosphate fertilizer industry, primarily consists of calcium sulfate dihydrate. ... but it also generates large amounts of waste that can be harmful to the environment. Dealing with this waste is a challenge that humanity must face (Goodship, 2009). One of the critical industries for …
