Assessment of the mobility of potentially toxic trace …
Phosphogypsum (PG) is a solid by-product of the phosphate industry, rich in contaminants and produced in large quantities. Raw materials and stabilized specimens, consisting of bentonite-lime-PG mixtures, were characterized by mineralogical, microstructural, chemical, alpha-particle, and gamma-ray spectrometry analysis before …
Phosphogypsum chemistry under highly anoxic conditions
Phosphogypsum (PG), primary byproduct from phosphoric acid production, is accumulated in large stockpiles and occupies vast areas of land. ... Reduction of sulfate found in PG and significance of sulfide production in reducing aqueous concentrations of toxic metals were studied. Mississippi River alluvial sediment amended with PG was ...
Phosphogypsum-Based Ultra-Low Basicity Cementing …
Traditional Portland cement is widely used in the preparation of various hydraulic concrete. However, the high alkalinity produced by cement hydration threatens the survival of aquatic animals and plants. In this paper, a new eco-friendly, ultra-low alkalinity, cementitious material was prepared with industrial waste phosphogypsum, granulated …
A review on the environmental impact of phosphogypsum …
The phosphogypsum valorization became a necessity when the U.S. Environmental Protection Agency (EPA) legislation was modified in 1992 and allowed …
The leaching characteristics of common toxic elements in phosphogypsum …
Phosphogypsum (PG) is an acid by-product from the production phosphate fertilizers that is produced in large amounts all over the world. However, it is challenging to reuse this waste due to the quantities of various impurities in PG and technical restrictions, resulting in PG accumulation, which threatens adjacent environments.
Production Waste Management: Qualitative and Quantitative
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 …
(PDF) Potentially Toxic Effects of Phosphogypsum on …
We studied effects of phosphogypsum (PG) rates ranging from 1.4 to 84.2 Mg ha−1 applied to the Ap horizon of a plinthic Palexerult on the ionic composition of the soil solution, as well as their ...
Phosphogypsum
Phosphogypsum is a by-product of the phosphate fertilizer industry. It is generally treated by stacking, which not only causes environmental pollution, but also wastes resources. …
Potentially Toxic Effects of Phosphogypsum on …
Potentially Toxic Effects of Phosphogypsum on Palexerults in Western Spain We studied effects of phosphogypsum (PG) rates ranging from 1.4 to 84.2 Mg ha−1 applied to the Ap horizon of a plinthic Palexerult on the ionic composition of the soil solution, as well as their impact on biomass production in wheat [Triticum aestivum (L.), cv. Jabato ...
Plasma Technology for Phosphogypsum Treatment
The phosphate industry generates a large amount of waste called phosphogypsum (PG). Generally, this waste is discharged without any treatment, and it causes considerable environmental problems. Hence, the objective of this study is the treatment of phosphate waste using thermal plasma technology. First, the waste is …
Former Piney Point Owner found Liable for Pollution Tied to …
HRK's Piney Point facility was linked to a massive fish kill after 215 million gallons of toxic wastewater were discharged into Tampa Bay to avert the catastrophic collapse of a waste impoundment. ... Phosphogypsum is radioactive waste derived from processing phosphate ore into phosphoric acid, which is predominantly used in fertilizer ...
'Not Just Carcinogenic, It's Radioactive': Groups …
By Johnathan Hettinger. U.S. regulators are failing to address toxic "open-air dumps" that in some cases tower many hundreds of feet tall and hundreds of acres wide, according to a group of …
Phosphogypsum
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 ...
Mosiac plan to reuse phosphogypsum in road construction …
Phosphogypsum. Mosaic wants to use phosphogypsum in road construction Mosaic is backing bills that would allow the use of the mildly radioactive fertilizer waste, which emits radon gas, in road ...
The Synergistic Mechanism and Stability Evaluation of Phosphogypsum …
Geopolymer prepared from solid waste is a high value-added means. However, when used alone, the geopolymer produced by phosphogypsum has the risk of expansion cracking, while the geopolymer of recycled fine powder has high strength and good density, but its volume shrinkage and deformation are large. If the two are …
Harmless treatment technology of phosphogypsum: …
Mechanistic analysis indicates that the solidification and stabilization of toxic and hazardous substances in phosphogypsum is perfectly achieved owing to the …
Florida governor urgently working to prevent
Manatee County officials had ordered the evacuation of around 300 homes in the area on Saturday, due to "further collapse of phosphogypsum stacks." Phosphogypsum is a byproduct of fertilizer from phosphate rock, and is considered to be weakly radioactive. Why is the reservoir leaking?
Florida governor urgently working to prevent 'catastrophic …
Manatee County officials had ordered the evacuation of around 300 homes in the area on Saturday, due to "further collapse of phosphogypsum stacks." Phosphogypsum is a byproduct of fertilizer from phosphate rock, and is considered to be weakly radioactive. Why is the reservoir leaking?
Properties, Purification, and Applications of Phosphogypsum: …
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 …
Simultaneous enhanced phosphorus removal and hydration …
A further consideration for short-term impact assessments of groundwater environments is the bleeding rate of filling slurry, which directly affects the leaching rate of toxic elements in phosphogypsum after slurry filling stops (Wang et al., 2011; Zhang, 2022). Comparatively to the reference sample with a bleeding rate of 4.61%, PAC and …
Agronomy | Free Full-Text | Influence of EMR–Phosphogypsum…
This study investigates the growth dynamics and heavy metal immobilization in Sudan grass cultivated on substrates composed of electrolytic manganese residue (EMR), phosphogypsum, and chili straw biochar. Pot experiments revealed that a substrate with phosphogypsum constituting 75% of the mix hinders Sudan grass seed …
Solubility study and valorization of phosphogypsum salt …
Measurements of Tunisian phosphogypsum solubility in different aqueous solutions. • Better solubility of Tunisian phosphogypsum was obtained in NaCl solution (25 g/L).. Precipitation of CaCO 3 after addition of (NH 4) 2 CO 3 to the PG salt solution.. Crystallization of NaHSO 4.H 2 O rods after solution decarbonation and evaporation.. …
Phosphogypsum waste as a source of rare earth elements
The U.S. can source crucial rare earth elements domestically by exploiting waste generated by phosphoric acid production. Researchers tested different mineral and organic acids, instead of the toxic pollutant-generating Rare earth oxides of gadolinium, praseodymium, cerium, samarium, lanthanum and neodymium. Source: U.S. …
Biochar: Oman's Sustainable Solution for Agriculture and …
Oman embraces biochar for sustainable agriculture and climate change mitigation. Champion Ahmed Rashid Salim al Rabaiai's research highlights biochar's benefits for soil health, fertility, and water retention. Investments in biochar technology and collaborations aim to revolutionize agriculture, enhancing productivity while reducing …
Phosphogypsum stacks, toxic ponds, leaks and spills
The title image shows what the Phosphogypsum stacks at Piney Point look like, filled with what's known as process water. The stack rises 70+ feet above the surrounding area; the pond is about 20 ...
Toxic Chinese Drywall May Contain Radioactive Phosphorus Substance
Toxic Chinese drywall has caused thousands of homeowners across the United States to experience strong sulfuric smells, ... The EPA banned phosphogypsum in 1989 because it contains radium, which ...
Radioactive waste roads in Florida: …
Radioactive waste roads in Florida: Phosphogypsum can be tested in paving Conservation groups had urged the governor to veto the bill, saying phosphogypsum would hurt water quality and put road ...
Exploring the potential reuse of phosphogypsum: A waste or …
Abstract. Phosphogypsum (PG), the main industrial by-product of phosphate fertilizer industry, primarily consists of calcium sulfate dihydrate. However, it contains …
The treatment of phosphogypsum leachate is more urgent …
Phosphogypsum(PG) is one of the typical bulk industrial solid wastes generated in the phosphate chemical industry. Due to its huge production volume and immature resource treatment technology, a large amount of PG can only be stored and disposed in slag yards, and its impact on the ecological environment is becoming increasingly significant during …
Potentially Toxic Effects of Phosphogypsum on
Potentially Toxic Effects of Phosphogypsum on Palexerults in Western Spain We studied effects of phosphogypsum (PG) rates ranging from 1.4 to 84.2 Mg ha −1 applied