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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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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Phosphogypsum (PG) is a hazardous industrial solid waste product from the wet phosphate industry 1,2.The widespread deposition of that fine, light- to dark-grey, powder with a slight odor and ...
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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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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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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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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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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 …
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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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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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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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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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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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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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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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This study contributes to sustainable construction practices by exploring the use of phosphogypsum, a commonly discarded byproduct, in the production of recycled aggregates. Addressing both environmental and economic aspects of sustainability, we investigate the feasibility of employing phosphogypsum as a primary raw material, in …
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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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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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DOI: 10.1016/j.wasman.2014.11.012 Corpus ID: 9399950; Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste composting. @article{Yang2015EffectsOP, title={Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste …
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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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The U.S. Department of Energy's Office of Scientific and Technical Information
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This study investigated the effects of phosphogypsum and superphosphate on the maturity and gaseous emissions of composting kitchen waste. Two amended compost treatments were conducted using phosphogypsum and superphosphate as additives with the addition of 10% of initial raw materials (dry weight). A control treatment was also …
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Phosphogypsum (PG) is a solid waste product generated during wet-process phosphoric acid production. Various impurities considerably reduce the purity, …
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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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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(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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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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A long-term field experiment was performed on an Oxisol in Parana State, Brazil to evaluate the effects of triple superphosphate (TSP) and phosphogypsum application rates on nutrition and grain yield of soybean, wheat, and black oat under no-till. Applying TSP in the sowing furrow of soybean and wheat increased soybean yield by 14 …
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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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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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