1. Introduction. Nanoparticles (minerals, organic and/or inorganic amorphous phases, and complex mixtures) are of great environmental relevance with respect to the life on our planet and the quality of the atmosphere (Hochella et al., 2008, 2019).Nanoparticles (NPs) are global carriers of minor elements (both nutrients and toxins) and play an …
قرأ أكثر
Phosphogypsum, a by-product in phosphoric acid manufacturing process, produced in bulk quantity especially from the fertilizer industry, typically used as a supplementary fertilizer for soil ...
قرأ أكثر
Phosphogypsum disposal was a very simple matter in the early days of the industry. If at all possible, you located your plant near the ocean or on a river and dumped the phosphogypsum into the sea or the river. If you were foolish enough to locate where water disposal was not possible, you suffered the economic penalty of having to stack the ...
قرأ أكثر
Florida lawmakers are pushing a new bill that, if signed off by Gov. Ron DeSantis, could pave the way for new roads across the state to be made with "radioactive" mining waste that critics say ...
قرأ أكثر
The issue has drawn attention, at least in part, because phosphogypsum includes radioactive elements. It is stored in huge stacks. Opposition to phosphogypsum in roads. Opponents raised questions about the potential hazards of using phosphogypsum, including whether it could harm people working on roads and …
قرأ أكثر
Storage of phosphogypsum in waste heaps poses an environmental hazard, even if the facility is operated correctly. The problem of the utilization and storage of phosphogypsum is relevant for many …
قرأ أكثر
Phosphogypsum (PG) is a by-product of phosphate fertilizer production that contains radioactive and hazardous elements. This review evaluates the geochemical …
قرأ أكثر
Phosphogypsum (PG) is a by-product of phosphate fertilizer manufacturing. 30+ years ago, the EPA required PG be stored in stacks based on very conservative risk exposure guidelines. Today, science tells us a different story. ... Science once told us that PG must be stacked and stored away from people, but after more than 30 years of research ...
قرأ أكثر
Phosphogypsum is a waste by-product produced in the production of phosphoric acid and phosphate fertilizers ... all life on Earth. As a requirement of all biological beings, it is a cornerstone of nutrition for plants, animals, and people. Phosphogypsum is a waste by-product from the processing of phosphate rock in plants …
قرأ أكثر
Phosphogypsum contains substantial quantities of P, which can be beneficial if large amounts of gypsum are applied. The levels of the other elements in the materials are so low that they are of little importance. Phosphogypsum from Florida contains 226 Ra and gives off radon (222 Rn) gas, which poses a potential health hazard (Mays and Mortvedt ...
قرأ أكثر
Phosphogypsum is a byproduct material of phosphate fertilizer production. It is regulated for the presence of radium-226, a naturally occurring radioactive substance that produces radon gas, a hazardous air pollutant. The Clean Air Act requires the disposal of phosphogypsum in stacks, except for limited agricultural and research uses.
قرأ أكثر
"Phosphogypsum contains appreciable quantities of uranium and its decay products, such as radium-226," according to the EPA, which also notes that because the fertilizer production process ...
قرأ أكثر
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 …
قرأ أكثر
Phosphogypsum (PG) is a radioactive industrial by-product produced in large quantities when processing phosphate ores into fertilizers. With rapid growth of high concentration phosphate and compound fertilizers production in China, PG production is increasing every year. Phosphogypsum is usually stored in such a way that it not only …
قرأ أكثر
Potential Uses of Phosphogypsum and Associated Risks (pdf) (4.89 , May 1992, EPA 402-R92-002) Background Information Document. Revised Request for Approval of Additional Uses of Phosphogypsum Pursuant to 40 C.F.R. § 61.206 (pdf) (2 , April 2020) Petition for approval of other uses of phosphogypsum and risk …
قرأ أكثر
The P 2 O 5 and F are found in three forms: (i) on the surface of phosphogypsum crystals with water-soluble compounds (H 3 PO 4, Ca(H 2 PO 4) 2 ·H 2 O, NaF); (ii) substituted in the lattice of phosphogypsum crystal (effectively solid solutions of CaHPO4·2H 2 O or Na 2 SiF 6) in PG; and (iii) as insoluble compounds (Ca 3 (PO 4) …
قرأ أكثر
Culturally speaking, the culture of Oman basically describes the cultural aspects of people living in Oman, which is deeply rooted and defined by the religion of Islam. Oman has its own unique subsect of Islam, known as Ibadhism, however other strands of Islam such as Sunni and Shi'a are also practised. 1. Qaboos bin Said Al Said …
قرأ أكثر
Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. Phosphogypsum contains radium, …
قرأ أكثر
Phosphogypsum (PG) is a solid by-product generated in the production of phosphoric acid (PA) using conventional synthesis methods. The raw material, about 50 times more …
قرأ أكثر
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. The aim of this ...
قرأ أكثر
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 …
قرأ أكثر
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 …
قرأ أكثر
Florida phosphogypsum road debate continues: what the material is and isn't. By Jeff Butera Tampa. ... citing concerns it would harm people and hurt the environment. "It is a toxic material and ...
قرأ أكثر
Phosphogypsum (PG) is a by-product of phosphate fertilizer production that contains various impurities and radionuclides. This review explores its properties, …
قرأ أكثر
Potential Phosphogypsum Uses. Phosphogypsum is a by-product of the chemical reaction called the "wet process," whereby sulfuric acid is reacted with phosphate rock to produce the phosphoric acid needed for fertilizer production. There are approximately five tons of phosphogypsum produced for every ton of phosphoric acid produced.
قرأ أكثر
This article reviews the physical-chemical properties and environmental impacts of phosphogypsum (PG), a byproduct from phosphate fertilizer production. It …
قرأ أكثر
Research hotspots and trends of comprehensive utilization of phosphogypsum: Bibliometric analysis. Zhongqi Wei, Zhengbin Deng, in Journal of Environmental Radioactivity, 2022. Abstract. Phosphogypsum is a by-product of the phosphate fertilizer industry. It is generally treated by stacking, which not only causes environmental …
قرأ أكثر
The Florida Senate on Monday gave final approval to a bill that could be a step toward using phosphogypsum, a byproduct of the phosphate industry, in building roads. Senators voted 34-4 to approve ...
قرأ أكثر
UPDATE 04/08/2021: The immediate human threat may have passed, but the environmental threat is just rearing its head. We may no longer be looking at a catastrophic event at Piney Point, where just days ago we were facing the threat of a 400 million gallon immediate release that could have sent a 20-foot wall of toxic water hurtling through …
قرأ أكثر