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. …
Phosphogypsum (CaSO 4 ·2H 2 O) is heavy tonnage waste generated by binding calcium in the process of sulfuric acid decomposition of phosphate raw …
Construction and Building Materials. 2024; 2. Save. ... This study reports long- and medium-term effects of the application of up to 12 Mg ha -1 of phosphogypsum (PG) as soil conditioner and source of Ca and S, in two field trials, conducted under no-till … Expand. 58 [PDF] Save.
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 …
G&B Organics Soil Building Conditioner Kellogg Garden. This all purpose mulch and soil amendment mixes with your native soil to help loosen clay and add nutrients for strong root
The management of solid mine waste requires a detailed characterization and a full understanding of the reparation of elements in the origin rock and their distribution in the waste matrix (Elghali et al., 2018).It is now generally acknowledged that the distribution, mobility, availability, and toxicity of chemical elements are determined not …
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.
The use of phosphogypsum as an additive to lime, to enhance its performance in soil stabilization, is analyzed in this paper. Phosphogypsum is a by-product of the phosphate rock processing during … Expand
Adding cementitious and pozzolanic material to the soil modifies soil behavior through four mechanisms, i.e. cation exchange, particle restructuring (flocculation and agglomeration), cementitious hydration, and pozzolanic reactions.
Al-Alawi et al. (2020), for example, investigated the change in the UCS of Sabkha soil, which is a poorly graded (SP) from the arid area of Oman. They mixed 3%, 6%, 9%, and 12% by weight of gypsum with the soil and concluded that the 28 d UCS of the soil increased by about 33% after adding up to 6% by weight of gypsum.
to reuse PG in different fields such as soil stabilization amendments, agricultural fertilizers, set controller in cement manufactures and building materials. This paper reviews the …
In tropical no-till systems, applying lime (L) and phosphogypsum (PG) on the soil surface may be a potential strategy for reducing soil acidification and improving soybean root growth, thereby enhancing plant nutrition and physiological responses and, in turn, crop resistance to dry spells. This study evaluated the impact of long-term (17 …
The effects of CMC on the soil such as bonding, moisture conditioning, particle dispersion and aggregation may affect the effectiveness of PG and lime in the improvement of tunnel muck. Additionally, the dosage of CMC utilized during construction may vary based on soil properties or moisture content [26], [27]. Therefore, it is crucial …
•Phosphogypsum can be used as a soil amendment to repair sodic/saline or magnesium-affected soils, and those in low exchangeable calcium •It also tends to reduce crusting and enhance water retention properties of soil –Decreases water consumption –Reduces runoff and pollution of surface waters Florida Industrial and Phosphate Research ...
Modifying saline–alkali soil is crucial for ensuring food security and expanding arable land. Microorganisms play a key role in driving various biochemical processes in agricultural ecosystems. However, limited information exists on the changes in the microbial community and soil structure in soda saline-alkali soil under modified …
In this study, we investigated a coarse phosphogypsum containing 49.63% SO3, 41.41% CaO, 10.68%, 4.47% SiO2, 1.28% P2O5, 0.11% F, CaSO4·2H2O purity of 80.65%, and whiteness of 27.68. Phosphogypsum contains calcium sulfate dehydrate as the main mineral, with small amounts of brushite, quartz, muscovite, and zoisite. Harmful …
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 …
Phosphogypsum (PG) is a kind of industrial solid waste residue that is generated during the wet production of phosphoric acid. The main mineral composition of PG is CaSO 4 ·2H 2 O, and it is currently employed mostly in the field of building materials and the chemical industry [].PG has a complex chemical makeup and contains …
Phosphogypsum is usually a yellowish-white, light greyish-white or dark grey fine powdery solid. The main component of PG is CaSO 4 ·2H 2 O, which accounts for more than 90% of its total composition. In addition, PG contains phosphorus, fluorine, organic matters and other impurities (e.g. heavy metal elements and nuclides) (Rashad, …
Recycling phosphogypsum in road construction materials and associated environmental considerations: A review ... Wu et al. found that the 0.5% calcium carbide slag, as an alkaline conditioning agent, mixed with 0.4% silicate cement, ... Turabi A. Application of phosphogypsum in soil stabilization. Build. Environ. 2007; 42 …
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 ...
1. Introduction. The manufacture of phosphoric acid (H 3 PO 4) through a wet acid process, using natural phosphate rock as raw material generates a major solid waste, the phosphogypsum (PG) [1].PG is highly acidic (pH 1) when initially stored, due to residual sulfuric acid, and consists mainly of calcium sulphate dehydrated (CaSO 4 ·2H …
Phosphogypsum is considered to be the main by-product material which comes from phosphate rock deposits that is available in Jordan. The main purpose of this research …
Phosphogypsum (PG) is a by-product from the industry of phosphate fertilizer. Approximately 4–6 tonnes of PG are generated per tonne of phosphoric acid production. The continuous growth in the world population increases food production demand which requires an increase in phosphate fertilizer production resulting in an increase in PG …
In the agricultural field, phosphogypsum can be used as a soil conditioner for saline-alkali land . In addition, the preparation of calcium sulfate whiskers from phosphogypsum for use in rubber and …
The proctor compaction curve and zero air void line are shown in Figure 5. The figure indicates that the compaction curve of phosphogypsum is flat, which signifies that dry density is insensitive ...
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 where it is the result of natural guano processes as they took for instance place in the …
Soil nutrients losses, such as Ca, magnesium (Mg), potassium (K), and nitrogen (N) has been released by PG (Brien and Sumner, 2008) and gypsum (Alva and Gascho, 1991) applications. Salinity is a growing threat to food security in arid and semi-arid regions. Phosphogypsum is an affordable saline soil amendment.
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.
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 …
Sandy soil covers a significant portion of Egypt's total land area, representing a crucial agricultural resource for future food security and economic growth. This research adopts the hypothesis of maximizing …
Extensive investigations have been carried out to reuse PG in different fields such as soil stabilization amendments, agricultural fertilizers, set controller in cement …
