ties. e use of phosphogypsum for lling materials is feasible and has high value for natural resource conserva- tion, environmental protection, and economic development 9–11. To improve the ...
Phosphogypsum can be used as a conditioner to improve the physical and chemical characteristics of soil, delay soil degradation, and passivate heavy metals to …
Semantic Scholar extracted view of "The possibility of the phosphogypsum use in the production of brick: Radiological and structural characterization." by P. Kuzmanović et al. ... Environmental filling materials based on phosphogypsum powder with municipal solid waste incineration ash. Longlong Yin Q. Guo Xiao Wang Jing Yuan …
This report is addressing rapidly changing scientific, regulatory and policy perspectives concerning phosphogypsum (PG) management and use worldwide. It has been authored and reviewed by many of the world's top experts on PG from academia, international agencies and representatives of IFA's own member companies. The report …
Abstract Red mud and phosphogypsum are staple solid wastes, with considerably large annual emissions. Improving their comprehensive utilization is the key to addressing the large accretion of both red mud and phosphogypsum. They have great utilization potential and can be collectively modified to expand the utilization field and …
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 …
Ground granulated blast-furnace slag (GGBFS) was supplied by the Wuhan GangHua Co., Ltd. in China. Its chemical composition was tested by XRF and given in Table 1.The phosphogypsum (PG) and the natural gypsum (NG) were used in this study, and their chemical compositions were given in Table 1.The mineral compositions of …
Phosphogypsum (PG) is reused as aggregate in the cemented backfill, which effectively improves the PG reutilization efficiency. However, the massive …
Wet natural phosphogypsum (PGF) was directly obtained from the slag heap of the Tunisian Chemical Group M'dhilla Plant (Gafsa, Tunisia). The washed phosphogypsum (PGW) was obtained by washing the PGF; this was placed in a large sieve and washed several times until the wash water obtained a neutral pH (between 6.7 …
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 mainly used for the direct preparation of construction materials and chemical auxiliary …
Geopolymer prepared from solid waste is a high value-added means. However, when used alone, the geopolymer produced by phosphogypsum has the risk of expansion cracking, while the geopolymer of recycled fine powder has high strength and good density, but its volume shrinkage and deformation are large …
3.3 Use of Phosphogypsum in the Fertilizer Industry. Numerous studies have revealed that PG is used in the fertilizer industry as a source of S, Ca, and P, or as an acid, and as a composting additive. Potassium sulphate can be manufactured using various raw materials and methods. Sulphate reserves are becoming increasingly limited.
1. Introduction. Phosphogypsum (PG) is an industrial waste derived from the wet process for the manufacture of phosphorus fertilizer, during which the natural phosphate rock ore reacts with sulfuric acid [[1], [2], [3]]: (1.1) Ca 5 (PO 4) 3 F + 5 H 2 SO 4 + 10 H 2 O → 3 H 3 PO 4 + 5 C a SO 4 ⋅ 2 H 2 O + HFApproximately 4–5 tons of PG are …
The phosphogypsum valorization became a necessity when the U.S. 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 …
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 resource.
12 Phosphogypsum: Properties and Potential Use in Agriculture 231 • Discuss the uses of phosphogypsum in agriculture as a fertilizer, amendment to degraded soils, and as an additive fertilizer industry. • Define the PG impacts on crop production, soil, water, and environment. 2 Phosphogypsum Generation and Storage Processes ...
Recommended conditions include restricting the levels of radioactivity, notifying the public when phosphogypsum is used in a project and requiring "continued control, maintenance and use of the ...
The use of phosphogypsum for filling materials is feasible and has high value for natural resource conservation, environmental protection, and economic development 9 – 11. To improve the application of phosphogypsum filling materials (PFM) in building engineering, some scholars have focused on the physical behavior of the PFM.
Highly efficient modified phosphogypsum building gypsum powder and environmentally friendly utilisation in self-levelling mortar. Chao-qiang Wang, Yan Ying, …
Phosphogypsum (PG) is a byproduct of the wet manufacturing process for phosphoric acid and is considered an industrial waste material. Around 5 tonnes of PG are generated for every 1 tonne of phosphoric acid production [1].As the phosphorus chemical sector has expanded rapidly in countries like the Middle East, Africa, Russia, the United …
The test samples used in this study were taken from phosphogypsum produced by a phosphorus chemical enterprise in the Deyang Region, Sichuan Province, China. The content of CaSO 4 ·2H 2 O in the phosphogypsum was 80.65%, and the whiteness was 27.68. The water content of the phosphogypsum was less than 5%, …
1. Introduction. Phosphogypsum (PG) is among the by-products emitted by the phosphorus chemistry industry. About 5 tons of PG are emitted for each ton of phosphoric acid produced [1, 2], and its reaction is shown in Eq (1).About 300 million tons of PG are added annually, and total stockpiles exceed 600 million tons [3].PG is complex …
The phosphogypsum is a by-product of the phosphate fertilizer industry. It has accumulated over several decades, and not only takes up a large amount of land, but also poses a significant risk to the environment and resource waste. In order to promote the use of phosphogypsum, its hydration hardening characteristics are studied using a …
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 …
Partly refined boric acid and phosphogypsum mixture can be used in place of natural gypsum for Portland and Trass cements [12]. It can be processed by wet sieving and washing process in the plant. The impurities of phosphate, fluoride, organic matter and alkalies are reduced by considerable extent.
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 is a by-product of phosphoric acid industrial production, and its stacking volume is increasing year by year, which brings a great threat to the environment and agricultural safety. The way of comprehensive utilization of phosphogypsum was described, and the mechanism of phosphogypsum producing cement, preparing …
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 …
Introduction. Phosphogypsum (PG) is an industrial by-product from the production of wet-process phosphoric acid [1]. Due to the preparation process of phosphoric acid, the main chemical composition of PG is dihydrate calcium sulfate (CaSO 4 ·2H 2 O). PG generally contains small amounts of impurities such as phosphorus, fluorine, organic …
Uses for Phosphogypsum. While use in the US is limited, other countries are already putting this industrial by-product to good use. Outside the borders of the US, phosphogypsum is widely used in a number of applications (in India, phosphogypsum has been redefined as a co-product, further encouraging its reuse).