With good performance, phosphogypsum could be used in cast-in-situ walls. This paper provides the theoretical basis for the preparation and energy-saving application of …
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It is well known that the PG is a by-product of the wet chemical attack process of phosphate ores by sulfuric acid in the phosphorus fertilizer industry [[1], [2]].The primary constituent of the PG is calcium sulfate dihydrate (CaSO 4 ·2H 2 O), which accounts for over 90 % (mass ratio) of the PG. Besides, it also contains some impurities, such as water-soluble …
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However, biomimetic materials only stay in laboratory-scale models, and their large-scale industrial applications are yet to be realized. Here, inspired by nacre's architecture, we report a …
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Phosphogypsum (PG) is a by-product of phosphoric acid production and according to the Waste Management Strategy of the Republic of Croatia for 2007 – 2015 (Official Gazette 85/07, 126/10, 31/11, 46/15) it is classified under the waste code 06 09 01. Phosphogypsum has a significant impact on the environment by its effects, admixtures (impurities) and amount. One …
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This paper describes the application of phosphogypsum with cement and fly ash for soil stabilization. Atterberg limits, standard Proctor compaction and unconfined compressive strength tests were carried out on cement, fly ash and …
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Phosphogypsum (PG) is the most significant solid waste in the world. However, only 15% of it is recycled, and the rest is stored in useless and environmentally-damaging stockpiles, which are ...
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Phosphogypsum, a by-product of phosphate fertilizer production, is characterized by high production volumes and low utilization rates. It primarily consists of calcium sulfate …
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The Application of Phosphogypsum in Agriculture9 that Ca easily leached. Th ey also recommended the application of phosphogypsum in small amounts several times. Th e com-bination of phosphogypsum and lime and/or silicates improves surface and subsurface chemical properties of soil 12 months aft er application.
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application of phosphogypsum in casting in Oman. ... — In summary, the combined use of rice cultivation and phosphogypsum application significantly improves soil quality and alters fungal community structure in saline-alkali soil. These findings align with the objectives of our study, where we aimed to explore the effects of phosphogypsum ...
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and Guizhou, with a combined output of up to 78 million t of phosphogypsum in 2018, an unutilized rate of more than 80%, and a cumulative stockpile of more than 830 million t [19]. Currently, phosphogypsum is used as a soil amendment in most parts of the world, and phosphogypsum application can improve certain soil properties and increase crop
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The application of phosphogypsum in production of binding materials is burdened by the presence of phosphate, flourides and other soluble impurities. Nevertheless, the phosphogypsum is successfully applied for the production of anhydride cement in some countries [23]. Calcium oxide content in building material (Portland cement) and slag cement ...
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The combined application of B. velezensis and phosphogypsum (PG) promotes the growth and the absorption of soil nutrients of Cynodon dactylon L. by enhancing the soil available phosphorus, ammonium nitrogen, the activities of acid phosphatase and urease. •
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The exchange or membrane technique was adopted, combined with recrystallisation by Koopman and Witkamp, who showed that more than 90% of the heavy metals and lanthanides were removed (58). used 0 ...
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Phosphogypsum (PG) is the main by-product of wet phosphoric acid production and has seriously polluted the environment. In this study, PG was purified by reverse flotation using a photosensitive azobenzene surfactant (PASF). ... However, the operational complexity of this process limits its large-scale industrial application. This study used a ...
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1. Introduction. Phosphogypsum, a prevalent solid waste product with large stockpiles and severe environmental pollution, is one of the most common bulk solid waste products currently [1,2,3,4].China produces a huge amount of phosphogypsum annually, with an average annual emission of over 80 million tons from 2020 to 2022, but the utilization rate is …
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Phosphogypsum (PG), a by-product of industrial production of phosphoric acid and phosphate fertilizer, has a unique characteristic where it swells after absorbing water [1].The annual global production of PG is approximately 100–280 million tons [2 – 4].The rate of PG utilization is low compared to that of other industrial wastes, owing to the fact that phosphogypsum swells after …
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The optimal mix proportions for two types of lightweight soil, namely phosphogypsum cement microsilica (PGCF) and phosphogypsum cement slag powder (PGCS), were determined based on ...
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The article provides the information on a new method of processing phosphogypsum (calcium sulfate) stacks into a conditioned gypsum binder substance. The authors present the results of the...
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Th e application of phosphogypsum had a pronounced positive eff ect on corn yield, but not on winter wheat yield. Da Costa et al. (2015) conducted a study on acid soils of Brazil in
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The study of its mechanical properties is particularly important for engineering applications. The objective of the work is to discuss the influence mechanism of cemented …
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Many efforts have been made to achieve the resourceful use of phosphogypsum and to promote the sustainable development of phosphorus chemical enterprises [17], [18]pared with cement, phosphogypsum is simple to prepare, low cost and cost-effective [19], which meets the requirements of green and low-carbon development in the construction …
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This review summarizes the state-of-the-art research on phosphogypsum application in agriculture and soilization, as well as ideas and suggestions for its effective utilization in resource soil ...
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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, with only 15% of that utilized while the rest is usually placed on large dumps with potential serious human and environmental impacts.
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The use of industrial byproducts as construction material can help to achieve sustainability in this industry. Phosphogypsum (PG) is a waste obtained in the phosphoric acid (PA) manufacturing process, produced in large quantities, especially from the soil fertilizer industry. Alternatively, in the disposal of these materials in landfill, several investigations have …
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the most common applications for different PG binders [8] is mortars and different types of concrete [11]. 2 Aim and scope of the research . The aim of the research was revealing the areas of PG application in production of binders and composites made with PG. Regarding the high energy consumption α-
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Future of the application of phosphogypsum. As has been observed in the previous sections, PG waste shows very interesting properties for its application in construction materials, either in bricks, in manufactured products of plaster base, in cements mainly as setting regulator and in concretes, or as mineral addition to cement, as a ...
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The results indicate that the mechanical performance of PG-UHPC decreases slightly as phosphogypsum aggregate content increases, but it is still capable of meeting the requirements of applications. Moreover, the introduction of phosphogypsum aggregate in UHPC accelerates water migration and directly affects its hydration degree.
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The strength characteristics are studied by casting and testing nine cubes of 150mm side, three cylinders of 150 mm diameter and 300 mm height, and three beams of 100mm×100mm×500mm in case of each water-binder ratio with a particular percentage replacement of phosphogypsum. ... Mulla MS, Karjinni VV, Gundakalle VD, Thakare RB. Phosphogypsum ...
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The application of cast-in-situ phosphogypsum as the wall material of building structures can greatly reduce the environmental pollution caused by phosphogypsum.
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Phosphogypsum (PG) is a by-product of the fertilizer industry when producing phosphoric acid from phosphate rock. For every ton of phosphoric acid produced, approximately 5.0 tons of phosphogypsum are generated. ... The load application is performed via a conventional three-point bend fixture, with a loading speed of 1 mm/min at −10 °C and ...
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Phosphogypsum (PG in brief), is a by-product of the production of fertilizers from phosphoric acid. The major chemical composition of phosphogypsum is CaO (32.2–36.9%) and SO 3 (44–50.3%) [8].In previous studies, it was confirmed that approximately 5 tons of waste phosphogypsum were generated during the production of 1 ton of dry phosphoric acid [9].
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The amount of PBSS and PBSS-AP in the soil was maintained at 10%, to avoid swelling due to excess phosphogypsum content and reduce application costs. The experimental method was based on the specifications of the Chinese standard JTG E51-2009, which is similar to ASTM D-2166. UCS of the sample was determined using WHY-200 microcomputer ...
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Phosphogypsum (PG) is a phosphate fertiliser by-product. This by-product has a low level of utilisation. Calcium sulphate is dominated in PG similar to gypsum and, therefore, has good …
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In this paper, the road performance and mechanism of cement-phosphogypsum-red clay (CPRC) under dry and wet cycling were systematically investigated using 5% cement as curing agent, the mass ratio of phosphogypsum: red clay = 1:1, and 5% SCA-2 as water stabilizer. The road performance of dry and wet cycle mix was verified with the National Highway G210 …
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