Phosphogypsum (PG) is a major industrial waste emitted during phosphate production. Facing the environmentally risky challenges posed by PG emissions and stockpiles, a review of the state of PG resource utilization in civil engineering and searching for new ways to utilize PG to improve the utilization rate are necessary. Therefore, this …
Disadvantages with respect to alpha spectrometry are (a) the requirement of larger sample masses, (b) higher backgrounds and noises in gamma spectra, and (c) …
The best known disadvantages of adobe are its low mechanical properties and poor resistance to water damage. In this research waste phosphogypsum (PG) and natural gypsum were used as stabilization ...
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 (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 …
Introduction. 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 …
DOI: 10.1016/j.conbuildmat.2023.130348 Corpus ID: 255934198; Safe environmentally friendly reuse of red mud modified phosphogypsum composite cementitious material @article{Wang2023SafeEF, title={Safe environmentally friendly reuse of red mud modified phosphogypsum composite cementitious material}, …
In order to recycle the phosphogypsum into a building material, its harmful acidic impurities (especially the soluble phosphate) should be purified, and the mechanical properties improved.
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. ... the radioactivity for 266 Ra and 232 Th can be 10 to 100 times higher than those of the conventional building materials. Table 1. …
1st Spanish National Conference on Advances in Materials Recycling and Eco – Energy Madrid, 12-13 November 2009 S03-4 83 ADVANTAGES AND DISADVANTAGES OF USING PHOSPHOGYPSUM AS BUILDING MATERIAL. RADIOLOGICAL ASPECTS C. Gascó1, A.Alvarez1, N.Navarro1, L. Yagüe1, H.Tayibi2, F.A.López2, A. López-Delgado2 …
Phosphogypsum is a kind of solid waste that occupies land resources and harms the environment. It can be used as a solidified material, but the utilization of phosphogypsum is limited by its impurities and weak strength performance. This study aimed to use microbial-induced carbonate precipitation (MICP) to improve the water …
PG, discharged into the sea, watercourses or in wilderness stocks, contains toxic elements harmful to ecosystems and human health, including heavy metals and radionuclides, and there is therefore a...
Abstract Phosphogypsum (PG) is a calcium sulphate dihydrate and a by-product of the phosphate fertilizer industry. It is produced in huge quantities (300 MT/year), but only 15% of the PG produced is recycled. Phosphogypsum is valued in several sectors: road construction, building materials and agriculture.
More specifically, PG can be used as a substitute in the cement industry, in building materials and in road construction, as a fertilizer for soil improvement, as a raw material for the production of …
The effect of phosphogypsum (PG) on the hydration and retardation mechanism of phosphogypsum-based excess-sulfate slag cement (PESC) was mainly investigated. Based on the natural characteristics of PG, such as low pH value and the presence of soluble phosphorus impurities, the content of PG passing the 4.75 mm …
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 …
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 has poor cementitious activity, which hinders its large consumption in the field of building materials. By studying the phase and microstructure of phosphogypsum pretreated by alkali activation, and the compressive strength, and microstructure of the non-sintering building materials prepared with the high content …
PG-based building materials positively contribute to recovering PG and promoting resource recycling, but environmental safety and long-term stability need to be explored. In addition, the importance, limitations, and development trends of applying …
DOI: 10.1016/j.jobe.2024.109734 Corpus ID: 270037070; Phosphogypsum-based building materials: Resource utilization, development, and limitation @article{Zhang2024PhosphogypsumbasedBM, title={Phosphogypsum-based building materials: Resource utilization, development, and limitation}, author={Ji-xi Zhang and …
In industrialized nations, one-third of plastic is utilized for packaging and as building materials for vinyl siding and plumbing. Chewing gum is one example of a naturally occurring plastic material. Later, chemically modified naturally occurring materials like natural rubber, collagen, galalite, and nitrocellulose were used to make plastics.
Although phosphogypsum has NORM characteristics, over the years, research has been conducted to make possible using it as a building material component [32, 33] or as fertilizer [34]. The valorization of phosphogypsum is an active research field, and therefore, constant advances are performed to use it as recycled material, with …
Annual global PG production is about 160 million tons, of which only 15% of that is used while, the remnant is either stockpiled (58%) or discarded in water bodies (27%) (Hasana et al., 2022).
The currently applied methods for impurity removal from phosphogypsum mainly eliminate the influence of phosphorus and fluorine impurities on gypsum-building materials 6,7,8,9,10.
1. Introduction. Phosphogypsum (PG) is a bulk industrial solid waste of wet-process phosphoric acid production. Every ton of phosphoric acid production generates as many as 4–6 tons of PG, including more than 90% of CaSO 4 ·2H 2 O, a small amount of phosphorus, fluorine, organic matter, oxides, heavy metals, radioactive substances …
The natural radioactivity level in the waste-phosphogypsum could be a restriction for its use as building material, but this drawback could be avoided controlling its percentage …
The best known disadvantages of adobe are its low mechanical properties and poor resistance to water damage. In this research waste phosphogypsum (PG) and natural gypsum were used as stabilization material to improve the properties of adobe soil and to reduce its disadvantages at least partially. The compressive and flexural …
These results (Table 7) demonstrated that this material derived from phosphogypsum could be used as a building material for non-loadbearing structures or as a plaster or separation plate. Open in a separate window. Figure 9. Compressive force, compressive strength, flexion force and flexion strength curves of the prepared …
Valorization of phosphogypsum in cement-based materials: Limits and potential in eco-efficient construction. Bianca R.S. Calderón-Morales, ... Rafael García-Tenório, in Journal of Building Engineering, 2021. Abstract. Phosphogypsum (PG) is a type of synthetic gypsum generated during the production of phosphoric acid. Each ton of phosphoric …
Phosphogypsum (PG) is a calcium sulphate dihydrate and a by-product of the phosphate fertilizer industry. It is produced in huge quantities (300 MT/year), but only 15% of the PG produced is recycled. Phosphogypsum is valued in several sectors: road construction, building materials and agriculture.
There have been many studies worldwide on using ground granulated blast furnace slag combined with phosphogypsum (PG) to replace binder (B) in making concrete. ... One of the main disadvantages limiting the feasibility of super-sulphated binders in concrete is the relatively slow hydration and hardening processes, which …
Advantages and disavantages of using both, natural gypsum and phosphogypsum, are discussed in this work over a radiological point of view. The natural radioactivity level in …
1. Introduction. Phosphogypsum (PG), CaSO 4 ·2H 2 O, is a by-product coming from the processing of fluoroapatite resulting in H 3 PO 4 production. In the process, fluoroapatite is dissolved using sulfuric acid. Phosphoric acid (PA), phosphogypsum, and hydrofluoric acid are obtained: (1) Ca 5 (PO 4) 3 F + 5H 2 SO 4 + 10H 2 O→3H 3 PO 4 …
PG, discharged into the sea, watercourses or in wilderness stocks, contains toxic elements harmful to ecosystems and human health, including heavy metals and radionuclides, and there is therefore a …
The phosphate industry produces a hazardous byproduct called phosphogypsum (PG). A rising global stockpiling of PG poses severe threats to public …
