sources of phosphogypsum in karnataka india
Phosphogypsum
Phosphogypsum (PG) is the by-product of phosphoric acid plants. The PG dissolves faster, produces an acidic reaction, generates leaching solution with higher electrolyte concentration, promotes particle aggregation, and thereby improves soil hydraulic conductivity of sodic soil (Gharaibeh et al., 2014 ). India annually produced ∼11 million ...
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(PDF) Efficacy of Phosphogypsum as Source of Sulphur for …
Field experiment conducted on Green gram (Vigna radiata L.) during Pre-Kharif of 2012 in a typical red and lateritic soil of West Bengal, India revealed that sources of S viz. Gypsum, Magnesium ...
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Growth and activity of sulphate-reducing bacteria in
Phosphogypsum was shown to be a good source of sulfate for SRB in many studies (Rzeczycka & Blaszczyk, 2005; Wolicka & Kowalski, 2006) (Table 2.5). Sulfate and other biogenic elements present in ...
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Phosphogypsum
Phosphogypsum is a waste by-product from the processing of phosphate rock in plants producing phosphoric acid and phosphate fertilizers, such as superphosphate. The wet chemical phosphoric acid treatment process, or 'wet process', in which phosphate ore is digested with sulfuric acid, is widely used to produce phosphoric acid and calcium sulfate, …
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Natural radioactivity in mineral phosphate fertilizers and
Other sources include nuclear effluents, uranium mining and milling, and coal combustion ... and by-products like phosphogypsum generated during manufacturing, were excluded. ... Radioactivity of different types of fertilizers and its effect on agricultural soils of Mangalore District, Karnataka, India. Radiochemistry 63:667–671. https://doi ...
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Guidelines for use of micronutrients, soil ameliorants
National Food Security Mission—a strategic initiative of Ministry of Agriculture, Govt. of India, has endeavored to address these constraints by creating awareness among farmers and promoting use of soil ameliorants and micronutrients in major rice, wheat and pulse crops growing States of the country.
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Phosphogypsum utilisation in India: Literature survey
In India, little or no information appears to exist on the fundamental properties of phosphogypsum, its environmental factors, ground water contamination, runoff of contamination, leachates, and ...
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Exploring the potential reuse of phosphogypsum: A waste …
Abstract. Phosphogypsum (PG), the main industrial by-product of phosphate fertilizer industry, primarily consists of calcium sulfate dihydrate. However, it contains various impurities with variable quantities depending on the origin of the phosphate rock. These impurities can restrict the reuse of phosphogypsum as a secondary primary …
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Research hotspots and trends of comprehensive utilization …
Phosphogypsum is a safe secondary source of lanthanides, since its total radioactive background does not exceed admissible values [9] [10]. The content of rare earth metals in phosphogypsum is in ...
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Summary on the fate of Phosphogypsum
The specific gravity of phosphogypsum ranges from 2.3 to 2.6. The maximum dry bulk density is likely to range from 1470 to 1670 kg/m3. (92 to 104 lb/ft3), based on Standard Proctor Compaction. The gypsum cake, after filtration, usually has free moisture content between 18 to 35%.
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Incorporation of phosphogypsum with cement in rigid …
Phosphogypsum (Phosphate of Gypsum) powder is white and has a specific gravity of 2.3 % to 2.6 %. The purity of phosphogypsum is 85 %. The density of phosphogypsum is between 1470 and 1670 kg/m3. Around 6 million tonnes of gypsum waste, flour gypsum, and other gypsum are processed into phosphogypsum every year …
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Geochemistry and source contribution of fugitive phosphogypsum …
The present study has estimated the impact of fugitive phosphogypsum (PG) particles on the bulk atmospheric deposition (soluble and insoluble species) of a nearby urban area (Huelva, SW Spain). The work is based on the geochemical characterization of bulk atmospheric samples collected from April 2014 to March 2017 in a huge PG pond …
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Green Buildings from Industrial By-Product Phosphogypsum …
The majority of the natural gypsum in India is located in Rajasthan. Phosphogypsum is a by-product in the manufacture of phosphoric acid from rock phosphate by extraction with sulfuric acid. For every ton of phosphoric acid made, about 5 tons of phosphogypsum are generated. ... The properties of phosphogypsum depend …
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(PDF) Phosphogypsum Processing Method
The comparison of the developed phosphogypsum processing method with well-known national and foreign analogues showed that its cost-efficiency is 2-3 times higher; the area necessary for the plant ...
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Geochemistry and source contribution of fugitive phosphogypsum
Phosphogypsum (PG) is a by-product of the phosphate fertilizer industry that is produced during the phosphoric acid production process. Annual global PG production ranges between 100 to 300 Mt ...
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Preparing sulfoaluminate cement using phosphogypsum as …
1. Introduction. Phosphogypsum (PG) is an industrial byproduct generated during the wet process of phosphoric acid in the phosphorus chemical industry [1].Its formation is described using Eq. (1) [2].The annual global production of PG is ∼280 million tons, with China contributing toward ∼55 million tons [3].The primary chemical …
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Phosphogypsum, the composition and application of
Phosphogypsum, the composition of the formula: Phosphogypsum – a fertilizer used for plastering of soils. Phosphogypsum contains at least 80% of gypsum (CaSO4·2H2O) in the form of small crystals and 0.4% water-soluble phosphorus oxide, which is its beneficial components. It also contains soluble impurities (sulfuric acid, …
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EVALUATION OF POTENTIAL COMMERCIAL PROCESSES …
Although phosphogypsum is a by-product,each ton of P 2 O 5 produced by the wet process results in approximately 5 tons of waste gypsum. The impact of this curious production paradox is mitigated somewhat in nations which lack domestic gypsum sources and seek to avoid expensive imports. Phosphogypsum retains the
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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 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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Solubility study and valorization of phosphogypsum salt solution
Abstract. This paper aims to transform a phosphogypsum (PG) solution to non-toxic and industrially useable compounds. For that, the solubility of the Tunisian PG was studied in different aqueous ...
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PHOSPHOGYPSUM ANALYSIS: TOTAL …
Phosphogypsum samples were collected from 2 m-depth trenches at 0.5 m intervals in 24 locations in the tailings ponds. ICPMS analysis of the phosphogypsum samples shows that the ponds have a …
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Application of phosphogypsum in soilization: a review
Phosphogypsum is the most significant industrial solid waste in the world. Phosphogypsum has a complex composition and its traditional storage methods occupy …
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ReviewPhosphogypsum circular economy considerations: A …
Phosphogypsum (PG) is the primary byproduct generated during the production of phosphoric acid, an intermediate product in phosphate fertilizer production, from calcium phosphate (apatite) ore. PG also exists in very small amounts in nature …
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Industrial wastes: Fly ash, steel slag and phosphogypsum
The annual phosphogypsum (PG) production in India has been 6.5 million tons and about 4.5–5.0 tons (dry basis) of PG is generated per ton of phosphoric acid production. Fly ash ... Phosphogypsum (PG) is a rich source of sulfur and contains about 90% of sulfur in the form of calcium sulfate (CaSO 4.2H 2 O) (Fig. 4).
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Valorization of phosphogypsum in cement-based materials…
The amount of phosphoric rock and phosphogypsum sources of sedimentary origin is higher than those of igneous origin [97, 98]. After analysing different works on sedimentary PG, the most representatives were selected. ... Brazil, China, Egypt, USA, India, Indonesia, Spain and Sweden) in phosphogypsum. Adapted from Refs. [27, …
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Phosphogypsum: Properties and Potential Use in Agriculture
The question of considering phosphogypsum as a waste or a resource has been widely discussed in the literature, depending on the regulations in different countries. Despite the restrictions in some countries, phosphogypsum is used all over the world (e.g., Australia, USA, India, Egypt, Spain,…) for different purposes including:
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Journal of Radioanalytical and Nuclear Chemistry
Better filterability and reduced radioactivity of phosphogypsum during phosphoric acid production in Morocco using a fly ash waste and pure silica additive. Fatima Ezzahra Arhouni. Mohammed Hakkar. Mohammed Benjelloun. OriginalPaper Open access 18 March 2022 Pages: 1609 - 1617.
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Preparation of gypsum with high purity and whiteness from …
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, …
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Phosphogypsum: potential uses and problems – a …
Phosphogypsum (PG: CaSO4·2H2O) is a waste product generated by the phosphate industry. World production of this waste …
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Phosphogypsum | US EPA
Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. Phosphogypsum contains radium, which decays to form radon gas. Both radium and radon are radioactive and can cause cancer. The Clean Air Act regulations require that phosphogypsum be managed in …
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