Phosphogypsum: potential uses and problems – …
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 ...
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
Oman becomes world's largest gypsum exporter
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 …
A Review of Effective Utilization of Waste Phosphogypsum …
The phosphogypsum (factory .Over 6 million tons of PG is produced per annum in India and poses various environmental and storage problems. Out of these some quantities are utilized for of production of ammonium sulphate and few for other uses, there is accumulated stock of PG) is the industrial waste by-product produced in various …
Radiological, chemical and morphological
Phosphate rock (PR) samples were collected in the Fertiberia factory of Huelva in 2009. In this study 10 representative surface samples of phosphogypsum (PG) were selected from a sample set previously collected. The PG sampling procedure is described by Abril et al. [10]. These PG samples were taken in 2005 from a stack …
Rare Earths' Recovery from Phosphogypsum: An Overview …
The need for rare earths elements (REEs) in high tech electrical and electronic based materials are vital. In the global economy, deposits of natural REEs are limited except for countries such as China, which has prompted current attempts to seek alternative resources of REEs. This increased the dependence on major secondary rare …
PHOSPHOGYPSUM: A Review of the Florida Institute …
Impurities in phosphogypsum, primarily fluorine and phosphates, complicate its use in any of the thermal processing schemes, but do not disqualify it from being used as a raw material. The plant in South Africa uses phosphogypsum as a feed stock, and the Polish plants are said to use a mixture of natural gypsum and phosphogypsum.
Phosphogypsum production and utilization in China
Phosphogypsum (PG) is a radioactive industrial by-product produced in large quantities when processing phosphate ores into fertilizers. With rapid growth of high concentration phosphate and compound fertilizers production in China, PG production is increasing every year. Phosphogypsum is usually stored in such a way that it not only …
Phosphogypsum: Properties and Potential Use in Agriculture
2.1 Phosphogypsum Generation Processes. The wet and dry process are the two main commercial processes used to produce phosphoric acid from natural phosphate. The dry process consists of a thermal reduction of rock phosphate at 2000 °C using an electrical furnace in the presence of coke or silica.
Phosphogypsum
Environmental impact and management of phosphogypsum. Hanan Tayibi, ... Aurora López-Delgado, in Journal of Environmental Management, 2009. Phosphogypsum (PG) is a waste by-product from the processing of phosphate rock by the "wet acid method" of fertiliser production, which currently accounts for over 90% of phosphoric acid …
Oman: Dhofar Pharmaceutical Industries Factory opens with …
The factory, which employs advanced German technology, specialises in the production of intravenous solutions and kidney dialysis solutions. Built over 22,000 square metres, it aims to fulfil both local and regional pharmaceutical needs, bolstering drug security and supporting the goals of Oman Vision 2040.
Utilization of Industrial Waste Phosphogypsum as …
Phosphogypsum (PG) is a waste product of phosphate fertilizer and phosphoric acid industries. Vast quantities of the waste product are generally left stockpiled on the ground or discharged into rivers or ponds, and pose serious environmental concerns. Several countries are facing problems with the handling, storage, and utilization of PG.
Oman retains crown as world's biggest gypsum exporter …
From 2010 to 2019, Oman's shipped a total of 45.57 million MT, representing 28 per cent of the total. However, Thailand – long the Asia's dominant …
Interfacial Water Stability between Modified …
The objective of this study is to unravel the modification mechanism of a coupling agent on the water sensitivity of phosphogypsum asphalt mortar. The adhesion process of …
A Novel Process to Recover Gypsum from Phosphogypsum
In this study, we investigated a coarse phosphogypsum containing 49.63% SO3, 41.41% CaO, 10.68%, 4.47% SiO2, 1.28% P2O5, 0.11% F, CaSO4·2H2O purity of 80.65%, and whiteness of 27.68. Phosphogypsum contains calcium sulfate dehydrate as the main mineral, with small amounts of brushite, quartz, muscovite, and zoisite. Harmful …
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 …
Phosphogypsum Recycling: A Review of Environmental …
phosphogypsum deposits, which amount to 15.2 million tonnes in Rivne region [2], and 421.11 tons of phosphogypsum has accumulated in Vinnitsa region of Ukraine [3]. The U.S. Environmental Protection Agency prohibits …
EPA Approves Use of Phosphogypsum in Road Construction
WASHINGTON (October 14, 2020) — Today, U.S. Environmental Protection Agency (EPA) Administrator Andrew Wheeler approved a request from The Fertilizer Institute (TFI) to allow phosphogypsum to be used in government road construction projects. "Allowing the reuse of phosphogypsum shows EPA's commitment to working with industry in a way that …
From Grave to Cradle: Treatment, Resource Recycling, and …
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 …
Moroccan Phosphogypsum: Complete Physico-Chemical …
This study has been carried out to valorize the Moroccan phosphogypsum (PG) generated during the production of phosphoric acid. The enormous Mondial waste of PG is estimated to be more than 100 Mt/year, which has sparked interest in its usage in other sectors. This work presents the results of the physicochemical characterization of …
Phosphogypsum: potential uses and problems – a review
Abstract. Phosphogypsum (PG: CaSO 4 ·2H 2 O) is a waste product generated by the phosphate industry. World production of this waste exceeds 200 million tonnes per year. PG, discharged into the sea, watercourses or in wilderness stocks, contains toxic elements harmful to ecosystems and human health, including heavy …
Phosphogypsum and its Potential Use in Croatia: Challenges …
Phosphogypsum (PG) is a waste by-product (residue) originating from the production of phosphoric acid and phosphate fertilisers. PG contains chemical and radioactive impurities, which is why it is mostly stockpiled in controlled areas. ... PG was transported to a disposal site as slurry by pipelines some 4 km to the south of the factory.
Study on Mechanisms for Improving Quality and Whiteness …
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 …
The Concurrent Application of Phosphogypsum and …
Sandy soil covers a significant portion of Egypt's total land area, representing a crucial agricultural resource for future food security and economic growth. This research adopts the hypothesis of maximizing the utilization of secondary products for soil improvement to reduce ecosystem pollution. The study focuses on assessing the …
The Influence Mechanism of Molar Ratio on the Performance …
Comprising a relatively large amount of industrial solid waste, the high-value utilization of phosphogypsum (PG) is closely related to the sustainable development of resource materials and the protection of the ecological environment. PG can improve some of the shortcomings of geopolymers, but there is a lack of systematic research on the …
Oman Industrial Gypsum LLC
Oman industries Gypsum LLC "OIG" is a limited liability company with commercial registration number (1023823) was awarded an exploration license by Ministry of Commerce and industries in November 2013. …
A review on the environmental impact of phosphogypsum …
Phosphogypsum (PG) is a solid by-product generated in the production of phosphoric acid (PA) using conventional synthesis methods. The raw material, about 50 …
Oman becomes world's largest gypsum exporter
Oman becomes world's largest gypsum exporter. MUSCAT, MARCH 10 -. Having toppled Thailand to clinch the crown as the world's largest natural gypsum exporter, the Sultanate has the potential …
Phosphogypsum as a construction material
Phosphogypsum (PG) is a by-product generated from the phosphorus fertilizer industry (phosphoric acid production). PG is similar to natural gypsum, but there are some differences, of which it contains some impurities such as water-soluble phosphate (P 2 O 5), water-soluble fluoride (F −) and P 2 O 5 substituted in the gypsum crystal …