Phosphogypsum (PG) is an acidic by-product that is created during the production of phosphoric acid using the sulfuric acid route. The management of PG …
Radiological characterization of radionuclides contained in the phosphate rocks, phosphogypsum, phosphoric acid, and phosphates fertilizers (DAP, NPS, NPK, TSP, and TAP) in Morocco have been performed to provide a database for the assessment of the environmental and the radiological impacts.The measurements of the activity …
Internal and external hazard index (H in and H ex) The internal exposure of 222 Rn and its daughter products is controlled by an internal hazard index, H in, which is defined by the following Eq. (3): (3) H i n = A R a 185 + A T h 259 + A K 4810
Phosphogypsum (PG) was treated to reduce activity concentrations of 226Ra, which was found to exceed that permitted by international regulations.
In this way, it is possible to determine how the most hazardous components of phosphogypsum behave during procedures until their stabilization through CO 2 …
Alawi Zawawi, Vice Chairman of USG Boral Zawawi Gypsum, a leading player in the export of natural gypsum, said that Oman has the potential to export cumulatively total more than 300 million tonnes over the next 15 years (2018-2032), going by current trends. At an average Export FOB price of $18 per tonne, this could generate …
Phosphogypsum (PG) is a solid by-product generated in the production of phosphoric acid (PA) using conventional synthesis methods. The raw material, about 50 …
Laboratory investigation of cemented silt improved with bentonite and phosphogypsum in DCM walls. Jianwen Ding Institute of Geotechnical Engineering, School of Transportation, Southeast University, …
on the utilization of phosphogypsum. Mousa and col-leagues5 studied the preparation of nano-material from phosphogypsum. Değirmenci and colleagues6 studied the application of phosphorus gypsum in soil stabilization, and found that phosphogypsum and fly ash provide an Preparation and thermal insulation performance of cast-in-situ …
This paper summarizes the common contents of major impurity components (silicon and phosphorus) and trace impurity components (fluorine, iron, aluminum, and …
1. Introduction. Phosphogypsum (PG) is a by-product generated from the phosphorus fertilizer industry (phosphoric acid production).
In this research, occupational safety and health key risks in building construction in Oman were identified; the awareness and assessment level and procedure are studied.
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 …
Phosphogypsum (PG), a byproduct during the phosphoric acid production process, also known as the wet process, contains complex and diverse impurities, resulting in low utilization and considerable accumulation. This leads to a massive waste of land resources and a series of environmental pollution problems. Given the current urgent …
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. ... the total amount of heavy metal in the soil or plant tissues may not be the best way to assess the environmental safety of PG use in ...
To improve the seismic behaviour of cold-formed steel (CFS) walls, a novel infilled CFS wall covered with different wall sheathings (gypsum wallboard, oriented strand board and fibre cement board) was assessed. Four full-scale specimens were tested under cyclic lateral loads to investigate the impacts of the wall sheathings on the seismic …
Phosphogypsum was used as raw and calcined materials for making the cementitous binder. A suitable amount of phosphogypsum was air dried and sieved through a 4.75 mm sieve before using. In order to obtain calcined gypsum, phosphogypsum was heated in an electric oven at 150 °C for 2 h. The calcined …
The application of cast-in-situ phosphogypsum wall could consume a large amount of pollutant, and improve the efficiency of building construction. ... The softening coefficiency of 7.5% fly ash was 0.64, which could meet the requirements for interior materials, which increased 10.3% compared to raw calcined phosphogypsum. The …
Request PDF | Laboratory investigation of cemented silt improved with bentonite and phosphogypsum in DCM walls | Engineering properties of cemented soil in deep cement mixing (DCM) walls ...
Environ Earth Sci (2014) 71:2257–2266 DOI 10.1007/s12665-013-2629-z ORIGINAL ARTICLE Radiological hazard assessment for building materials incorporating phosphogypsum made using Eshidiya mine rock in Jordan Mohammad Al-Hwaiti • Omar Al-Khashman Laila Al-Khateeb • Feras Freig • Received: 7 November 2012 / Accepted: …
Similarly, external and internal hazard's indices, gamma level index, and excess lifetime cancer risk vary from 0.06 to 1.69, 0.09 to 3.20, 0.15 to 4.19, and 0.00004 to 0.00123, respectively ...
WASHINGTON (October 14, 2020) — Today, U.S. Environmental Protection Agency (EPA) Administrator Andrew Wheeler approved a request from The Fertilizer Institute (TFI) to allow phosphogypsum to be used in government road construction projects. "Allowing the reuse of phosphogypsum shows EPA's commitment to working with industry in a way that …
This work is a first contribution to the knowledge of natural radionuclides (226Ra, 238U, 40K, and 232Th) activities in phosphate rock (NORM), phosphogypsum, and phosphogypsum (TENORM) from the coastal fertilizer plants of Gabes (Southeastern Tunisia) and the assessment of their radiation hazards on human health …
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 ...
Re-energize your indoors with Oman's finest range of interior wall paints Caparol's indoor paints come in a range of glossy, matt, velvet and satin finishes with top-of-the-line features to render a refreshing look and feel to your walls and ceilings. Our Interior range offers excellent strength and washability, scrub-resistant, easy to ...
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 …
Phosphogypsum (PG: CaSO4·2H2O) is a waste product (or by-product) from the production of phosphoric acid, the main component in the production of concentrated simple and complex fertilizers. The world production of phosphogypsum exceeds 200 million tons per year. PG discharged into water bodies (seas, rivers) or …
Internal walls can be built up in a number of ways. In block-built homes, the most common method is to use blockwork for the load-bearing walls, and timber studwork elsewhere. Typically, this translates as blockwork walls downstairs and timber studwork upstairs, especially if the roof is built using trusses, which transfer all the weight to the ...
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 (PG) and phosphorus slag micropowder (PS) are sourced from Guizhou Phosphate Group. PG used in this paper is a mixture of β-hemihydrate gypsum, dihydrate gypsum and anhydrite gypsum produced by calcination of dihydrate phosphogypsum at high temperature.PG has a specific surface area of 350–400 m 2 …
Abbas Al Lawati is the Head of Internal Audit at OQ8, and a member of the advisory board at the Modern College of Business & Science. He is a Certified Internal Auditor (CIA), Chartered Internal Auditor (CMIIA), and …
A variety of co-existing impurities in phosphogypsum limit its large-scale and high-value utilization. This paper summarizes the common contents of major impurity components (silicon and phosphorus) and trace impurity components (fluorine, iron, aluminum, and carbon) in phosphogypsum and discusses the harm of impurity …
Kingspan's solid board internal wall insulation is an insulated plasterboard with a thermal conductivity of 0.018 W/mK. (Image credit: Kingspan) It has been well established that improving airtightness has a greater impact on heat loss than insulation. The solid elements of the wall will naturally be fairly airtight — but it is the gaps, cracks …
The internal hazard index and the radioactivity level index calculated for the PG were superior to the permissible level. Therefore, the building materials used have a tolerable radi ation level for
Oman has a diverse geology and physiography as a result of its location close to active tectonic plates. Oceanic and continental rocks spanning in age from the Proterozoic to the Tertiary are overlain by mobile sediments of the Quaternary. Infrastructure is expanding due to demands for industrial and residential land and …
Environmental impact and management of phosphogypsum. Hanan Tayibi, ... Aurora López-Delgado, in Journal of Environmental Management, 2009. Phosphogypsum (PG) is a waste by-product from the processing of phosphate rock by the "wet acid method" of fertiliser production, which currently accounts for over 90% of phosphoric acid …
The application of cast-in-situ phosphogypsum as the wall material of building structures can greatly reduce the environmental pollution caused by phosphogypsum.
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 concern regarding environmental impacts.
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 …
