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phosphogypsum superphosphate in Oman
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Effects of phosphogypsum, superphosphate, and …
DOI: 10.1016/j.biortech.2018.09.023 Corpus ID: 52879266; Effects of phosphogypsum, superphosphate, and dicyandiamide on gaseous emission and compost quality during sewage sludge composting.
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Radioactivity of phosphate ore, superphosphate, and phosphogypsum …
A measurement of the radioactivity content of phosphate ore material, phosphatic fertilizer (superphosphate), and by-product phosphogypsum in the Abu-Zaabal phosphate plant, Egypt, has been carried out.
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Phosphogypsum circular economy considerations: A critical …
This article reviews the physical-chemical properties and environmental impacts of phosphogypsum (PG), a byproduct from phosphate fertilizer production. It also discusses the challenges and opportunities of PG reuse and management in a circular …
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Effects of phosphogypsum, superphosphate, and …
As for the EC, there was a reduction of 4% in relation to the initial sewage sludge, with a mean of 2.61 dS m − 1 at the end of composting (Table 1), below 4 dS m − 1, the ideal maximum value ...
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Effects of dicyandiamide, phosphogypsum and superphosphate …
This study investigated the effects of dicyandiamide, phosphogypsum and superphosphate on greenhouse gas emissions and compost maturity during pig manure composting. The results indicated that the addition of dicyandiamide and phosphorus additives had no negative effect on organic matter degradation, and could improve the …
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Oman Industrial Gypsum Company LLC | Products
We are the leading company in sultanate of oman which supplies Natural Gypsum. Raw gypsum quarry stock more than 30 million MT. Oman Gypsum quarry is located 19 km …
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Effects of Dicyandiamide, Phosphogypsum, and Superphosphate …
Phosphogypsum and superphosphate were applied with the same amount of phosphorus (5% of the initial total nitrogen, molar basis) or weight (10% of initial dry matter) and compared to a control ...
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Effects of phosphogypsum and superphosphate on …
Phosphogypsum and superphosphate had no negative effects on compost maturity, although superphosphate inhibited the temperature rise in the first few days. The addition of phosphogypsum and superphosphate drastically reduced CH 4 emissions (by 85.8% and 80.5%, respec-tively) and decreased NH 3 emissions (by 23.5% and 18.9%, …
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Agriculture | Free Full-Text | Agroecological Transformation …
The purpose of our research is to evaluate the agroecological condition of soils under long-term irrigation (over 50 years) and to improve existing measures to slow down degradation processes by introducing phosphogypsum. The possibility of simultaneously addressing the ecological issue of using large amounts of …
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Review Article Recent research in utilization of …
The phosphate industry produces a hazardous byproduct called phosphogypsum (PG). A rising global stockpiling of PG poses severe threats to public …
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Application of phosphogypsum in soilization: a review
Phosphogypsum(PG) CaSO 4 ·2H 2 O is a by-product of phosphate ore processing, phosphate fertilizer and compound fertilizer containing phosphorus, and wet phosphoric acid production, which is acidic (pH = 1–4.5) and poorly mobile (Zirnea et al. 2013).The reaction of PG generated in the wet process of phosphoric acid production is …
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Effective and innovative procedures to use phosphogypsum …
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 …
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Effects of phosphorus-containing additives on carbon …
In addition to control treatment (CK) without additive addition, other three treatments were performed to be added 10% of phosphogypsum as well as 2.5% and 10% of superphosphate based on dry mass (DM), which were named as PPG, SSP-L, and SSP-H, respectively. 10% phosphogypsum and 2.5% superphosphate had identical …
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Effects of phosphogypsum, superphosphate, and …
This study investigated the effects of phosphogypsum, superphosphate, and dicyandiamide on gaseous emission and compost quality during sewage sludge composting. Results showed that phosphogypsum reduced ammonia (NH3) and methane (CH4) emissions but increased …
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Performance of phosphogypsum and calcium magnesium phosphate …
Pig manure and cornstalk were completely mixed at a ratio of 6:1 (wet weight) as raw composting materials. Apart from a control treatment (denoted as "Control"), three treatments were performed, in which phosphogypsum, calcium magnesium phosphate fertilizer, and their blend (1:1 w/w) was added at the beginning of composting, …
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Phosphogypsum
Phosphogypsum is a waste by-product from the processing of phosphate rock in plants producing phosphoric acid and phosphate fertilizers, such as superphosphate. The wet chemical phosphoric acid treatment process, or 'wet process', in which phosphate ore is digested with sulfuric acid, is widely used to produce phosphoric acid and calcium ...
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Realising the circular phosphorus economy delivers for …
During the process of phosphoric acid production, the potentially hazardous waste by-product phosphogypsum, hydrated calcium sulfate, is produced at a quantity 5-times that of phosphoric acid 110,143.
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Potential uses of phosphogypsum: A review
Phosphogypsum (PG) is a by-product of the phosphate fertilizer industry, produced during the production of phosphoric acid. It is a grey, damp, fine grained powder, silt or silty …
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Phosphogypsum: Properties and Potential Use in Agriculture
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. ... (2015) Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste …
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Realising the circular phosphorus economy delivers for …
During the process of phosphoric acid production, the potentially hazardous waste by-product phosphogypsum, hydrated calcium sulfate, is produced at a quantity 5 …
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Effects of phosphogypsum, superphosphate, and dicyandiamide on …
Combination of superphosphate and dicyandiamide reduced NH 3, CH 4 and N 2 O emissions by 12.3%, 81.0% and 88.2%, respectively. More importantly, with the addition of 10% initial raw materials, phosphogypsum and superphosphate conserved nitrogen and improved compost quality by introducing additional nutrients.
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Radioactivity of phosphate ore, superphosphate, and phosphogypsum …
Radioactivity of phosphate ore, superphosphate, and phosphogypsum in Abu-Zaabal phosphate plant, Egypt Health Phys. 1994 Sep;67(3):280-2. doi: 10.1097/00004032-199409000-00010. Author E M Hussein 1 Affiliation 1 Nuclear Materials Authority, Abu ...
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Oman becomes world's largest gypsum exporter
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 …
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Effects of phosphogypsum and superphosphate on compost …
This study investigated the effects of phosphogypsum and superphosphate on the maturity and gaseous emissions of composting kitchen waste. Two amended …
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Phosphogypsum impacts on soil chemical properties and
Phosphogypsum (PG) is a by-product of phosphorus fertilizer that is typically stacked near production sites. Phosphogypsum contains trace elements and naturally occurring radioactive materials which may be hazardous to the surrounding environment. Phosphogypsum stack reclamation typically involves placing a soil cap …
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Effects of phosphogypsum and superphosphate on …
Currently, phosphogypsum is mainly used for the direct preparation of construction materials and chemical auxiliary materials, but the amount of phosphogypsum used in this process is small, so its ...
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Effects of dicyandiamide, phosphogypsum and superphosphate …
Dicyandiamide and superphosphate increased the seed germination index (145.55 %). • Dicyandiamide addition reduces N 2 O emissions by 32 % during composting.. Phosphorus additives decrease NH 3 and CH 4 emissions by 20 % and 38 %, respectively.. Combining dicyandiamide and phosphogypsum effectively reduces total GHG emissions.
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Effects of phosphogypsum and superphosphate on …
The addition of phosphogypsum and superphosphate drastically reduced CH4 emissions (by 85.8% and 80.5%, respectively) and decreased NH3 emissions (by 23.5% and 18.9%, respectively). However, a slight increase in N2O emissions (by 3.2% and 14.8%, respectively) was observed. Composting with phosphogypsum and …
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Microbial succession and molecular ecological networks
This study assessed the effects of superphosphate (SPP) and phosphogypsum (PPG) on the bacterial and fungal community succession and molecular ecological networks during composting. Adding SPP and PPG had positive effects on the bacterial richness and diversity, negative effects on the fungal richne …
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Role of phosphorous additives on nitrogen conservation and …
This study compared different types and addition amounts of phosphorous additives on nitrogen conservation and maturity during pig manure composting. Phosphogypsum and superphosphate were applied with the same amount of phosphorus (5% of the initial total nitrogen, molar basis) or weight (10% of initial dry matter) and …
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Effects of phosphogypsum and superphosphate on …
The addition of phosphogypsum and superphosphate drastically reduced CH 4 emissions (by 85.8% and 80.5%, respectively) and decreased NH 3 emissions (by 23.5% and 18.9%, respectively). However, a slight increase in N 2 O emissions (by 3.2% and 14.8%, respectively) was observed. Composting with phosphogypsum and …
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Effects of dicyandiamide, phosphogypsum and superphosphate …
Dicyandiamide combined with phosphogypsum or superphosphate could enhance mitigation of the total greenhouse gas (29.55 %-37.46 %) and NH3 emission (18.28 %-21.48 %), which was mainly due to lower pH value and phosphoric acid composition. The combination of dicyandiamide and phosphogypsum exhibited the most pronounced …
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Effects of dicyandiamide, phosphogypsum and superphosphate …
Dicyandiamide combined with phosphogypsum or superphosphate could enhance mitigation of the total greenhouse gas (29.55 %–37.46 %) and NH 3 emission (18.28 %–21.48 %), which was mainly due to lower pH value and phosphoric acid composition. The combination of dicyandiamide and phosphogypsum exhibited the most …
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Potential uses of phosphogypsum: A review
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.
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Phosphogypsum impacts on soil chemical properties and
Phosphogypsum (PG) is a by-product of phosphorus fertilizer that is typically stacked near production sites. Phosphogypsum contains trace elements and naturally …
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Effects of dicyandiamide, phosphogypsum and superphosphate …
Phosphogypsum and superphosphate were applied with the same amount of phosphorus (5% of the initial total nitrogen, molar basis) or weight (10% of initial dry matter) and compared to a control ...