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·Real scale application of phosphogypsum The use of PG has been developed mainly in countries where NG resources are scarce such as China India Japan or Australia In these last two countries almost 100% of the PG produced is used In the study they show a wall made with molds and cast PG
The Journal of Materials of Civil Engineering 1996;8 1 This study reports the application of phosphogypsum with cement and fly ash as a stabilization agent on two selected soils In the light of the test results the following conclusions can be made 1 Treatment with phosphogypsum fly ash and cement generally reduces the plasticity index
·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
·Nano CaSO4 a good cubic structure with dimensions of no more than 100 nm was first prepared from phosphogypsum PG The effects of different reaction conditions on PG morphology achieved by optimizing the reaction temperature the concentrations of HNO3 H2SO4 and cetyltrimethylammonium bromide CTAB and other factors were discussed
·The phosphogypsum valorization became a necessity when the Environmental Protection Agency EPA legislation was modified in 1992 and allowed the use of PG with an average 226 Ra of less than 370 Bq/kg for agricultural applications such as a soil amendment Other areas in the world however looked at PG as a valuable raw material and
·A complete application is required for every individual proposed use of phosphogypsum For more information on requesting other use of phosphogypsum see Workbook Applying to EPA for Approval of Other Uses of Phosphogypsum Preparing and Submitting a Complete Petition Under 40 CFR pdf KB
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
·A field experiment examined the effects of phosphogypsum PG applications on nutrient uptake and availability of S to maize and wheat crops under an NT system aiming to establish critic levels of S on an Oxisol clay kaolinitic Rhodic Hapludox in Parana state Brazil PG at the rates of 0 3 6 and 9 t ha−1 was applied on the surface of
Phosphogypsum PG is a by product of the phosphate fertilizer industry In Brazil three main phosphate industries are responsible for the production of × 106 metric tons of PG per year which…
·Phosphogypsum application could also serve to 1 improve soil quality by reducing levels of exchangeable sodium and magnesium percentage 2 improve soil water movement and water storage in the root zone 3 improve irrigation efficiency 4 increase crop yields and water productivity 5 enrich the soil with phosphorus calcium and sulphur
·This paper presents also a brief study on the application of Life Cycle Assessment LCA methodology to assess environmental impacts of PG use and management Gen erally the application of LCA in this eld is not largely reported For that this review attempts to discuss and ana lyze the most important decisions taken in recent LCA stud ies
· phosphate mines phosphorus chemical enterprises phosphogypsum stockpiles in the waste stockpiles and environmental pollution problems This review summarizes the state of the art research on phosphogypsum application in agriculture and soilization as well as ideas and suggestions for its eective utilization in resource soil
·Phosphogypsum application decreased the number of pods per plant of the Carioca bean cultivar but did not affect other yield components or grain yield The lime dose to raise the base
·Phosphogypsum is the most significant industrial solid waste in the world Phosphogypsum has a complex composition and its traditional storage methods occupy large areas of land and also damage the environment Currently phosphogypsum is
·Phosphogypsum PG accumulation occupies huge amounts of land resources and results in serious environmental risks A new recycling product the phosphogypsum embedded filler PGEF made with calcination modified phosphogypsum was developed The preparation process hydration mechanism of PG basic physical performances environmental
Phosphogypsum PG is a byproduct generated during the wet processing of phosphoric acid production from phosphate rock Baolin et al 2022 It is estimated that tons of PG are produced for per ton of phosphorus pentoxide produced El Didamony et al 2012 PG has a complex with more than 80 %−90 % consisting of CaSO 4 ·2H 2 O However due to the
·Red clay is a special clay that exhibits many fissures high shrinkage and high water sensitivity and these features affect the application of red clay in highway engineering [5][6][7][8][9]
·Phosphogypsum PG a by product of the phosphate industry was incorporated with soil to determine effects of land disposal on crop growth and uptake of cadmium Cd and radium Ra Application rates of PG were 0 22 and 112 Mg ha −1
·With the gradual application of hemihydrate wet process the comprehensive utilization of hemihydrate phosphogypsum HPG needs to be concerned by phosphorus chemical industry
·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
·The accumulation of original phosphogypsum OPG has occupied considerable land resources which have induced significant environmental problems worldwide The OPG based cemented paste backfill OCPB has been introduced as a promising solution In this study a water washing pre treatment was used to purify OPG aiming to optimize the
·Semantic Scholar extracted view of "Application of phosphogypsum in soil stabilization" by N Değirmenci et al
