Phosphogypsum radioactivity

Phosphogypsum radioactivity

Phosphogypsum an overview ScienceDirect Topics

Phosphogypsum Phosphogypsum a waste by product from wet acid production of phosphoric acid contains variable levels of metal impurities Cd Zn barium Ba and radionuclides mainly uranium U thorium Th and radon Ra depending on the composition of the phosphate rock and efficiency of the wet process used Rutherford et al 1994

Radioactive Material From Fertilizer Production US EPA

The waste that is left behind is called phosphogypsum Most of the naturally occurring uranium thorium and radium found in phosphate rock ends up in this waste Uranium and thorium decay to radium and radium decays to radon a radioactive gas Because the wastes are concentrated phosphogypsum is more radioactive than the original phosphate rock

Use of an industrial by product phosphogypsum in the production of

Dihydrate phosphogypsum PG is the main by product of the production of fertilizers in SC Lifosa Lithuania The specific gravity of phosphogypsum is 2360 kg/m 3 its average pH value is XRD pattern of this material Fig 1 curve a confirms that the dominant compound is dihydrate gypsum CaSO 4 ⋅2H 2 O d nm also minerals of whitlockite Ca 3 PO 4

Natural radioactivity assessment of a phosphate fertilizer plant area

The phosphogypsum and rock phosphate samples were analysed for the estimation of radioactivity in them along with the soil samples The results for activity concentration of 238 U 226 Ra 232 Th and 40 K in the samples were compared with other studies carried out worldwide Table 2 shows the wide variation of activity concentrations of all the radionuclides observed by a number of researchers

Fertilizer giant reactivates March Against Mosaic Facebook

Mosaic has said it was able to retrieve that water which contains low levels of radioactivity The site of the sink hole is sealed and would not be reopened for this expansion Mosaic spokesperson Jackie Barron told The Daily Sun Thursday A Mosaic photo is of the phosphogypsum stack in New Wales near Mulberry that collapsed inward in 2024

EPA Sued For Approving Radioactive Roads WUSF Public Media

For about three decades it s been the position at the EPA that a product called phosphogypsum — a radioactive waste that s left over from creating chemicals used for fertilizer — poses an unreasonable risk to public health if it were put into roads The substance produces radon gas a hazardous air pollutant

Is phosphorite a mineral Explained by FAQ Blog

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

EPA allows use of radioactive material in some road construction

The Environmental Protection Agency EPA has approved for use in government road construction projects a substance that has been regulated due to radioactivity Phosphogypsum a waste product

Phosphogypsum Stacks Florida Poly

To conveniently discuss common amounts of radioactivity such as that associated with phosphogypsum we often talk in terms of picocuries pCi A picocurie is one trillionth of a curie The activity is then related to a given mass or volume of material like a liter or a gram depending on whether the material is liquid solid or gas

PDF Comparative Analysis of IAEA Safety Standards and Domestic Regulations

radioactive materials NORM such as raw materials Ex Zircon dioxide Monizite Potassium compounds Phosphogypsum Red mud consumer products consumer products manufactured by processing or using raw materials or NORM residues which are justified and have a relatively low risk it is recommended that safety standards and confirmation

Florida reservoir collapse What is phosphogypsum and is it radioactive

Phosphogypsum is a radioactive waste product that forms when phosphate ore is processed into fertiliser The material emits the radioactive gas radon and contains trace amounts of uranium thorium

Slope Stability Analysis for the Phosphogypsum Stockpiles A Case Study

The process of making phosphates fertilizer involves taking the soft rock phosphate and mixing it with sulphuric acid This process creates a gypsum by product phosphogypsum Although gypsum is a widely used material in the construction industry most of the produced phosphogypsum is not processed around the world and is stacked into large piles over the land especially near coastal areas

IE55482B1 Phosphohemihydrate purification Google Patents

radioactivity slurry Prior art date 1982 06 29 Application number IE1425/83A Other languages English en Other versions IE831425L en Original Assignee United States Gypsum Co Priority date The priority date is an assumption and is not a legal conclusion Google has not performed a legal analysis and makes no representation as to the accuracy

My articles Radioactivity in phosphogypsum

Phosphogypsum is not an innocuous material Besides many heavy elements it may contain significant quantities of radioactive materials such as uranium 238 and radium 226 Phosphogypsum produced from imported rock phosphates contains typically activity concentrations of U 238 in the range Bq/g and Ra 226 in the range Bq/g

Hydrocarbon‐degrading potential of microbial communities from Arctic

Microbial enumeration Microscopic counts and colony forming units are shown in Table counts of rhizospheric samples were numerically higher and significantly different P ≤ 0·05 from those of bulk highest microscopic bacterial count 5·9 × 10 9 cell g −1 was detected in rhizospheric sample V‐Es and the lowest 1·5 × 10 9 cell g −1 in bulk sample Bb

SSU Presented First Results of Priority 2024 Programme Implementation

A new material for the road surface has been developed phosphogypsum road Its production is characterised by low cost and due to it highways should be reconstructed twice as rarely The researchers have developed a catalyst for the synthesis of acrylic acid nitrile with a unique control of the catalyst directly in real time

Strategic minerals are needed to deliver the energy transition

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Radioactivity and chemical characteristics of Alberta phosphogypsum

Gypsum based by products of phosphate fertilizer production termed phosphogypsum PG are stockpiled at numerous locations worldwide Although dominated by gypsum PG contains accessory minerals trace elements and radionuclides This study was conducted to characterize the composition and pore water chemistry of PG samples from a plant site in southern Alberta Canada Pore water chemistry

17 Postdoc jobs in Physical Chemistry Academic Positions

Post Doc Valorization of Phosphogypsum Phosphogypsum to Critical Raw Materials 18 months European Synchrotron Radiation Facility ESRF Grenoble France Postdoc ID15B The European Synchrotron the ESRF is an international research centre based in Grenoble its innovative engineering pioneering scientific vision

EPA approves use of radioactive fertilizer byproduct in roads

Phosphogypsum is a radioactive byproduct produced during the process of extracting chemicals typically for fertilizer from rocks that often also contain uranium and radium by soaking

Potential Uses of Phosphogypsum and Associated Risks Background

In addition to radionuclides phosphogypsum contains some trace metals in concentrations which the EPA believes may pose a potential hazard to human health and the environment EPA90 Two contaminants chromium and arsenic were identified in phosphogypsum from some facilities at concentrations that may pose significant health risks

PDF Distributionofuraniumandthoriumchainsradionuclidesindifferent fractions

fractionation in phosphogypsum State of radioactive equilibrium is an excellent tool for study ing radionuclides fractionation and their distribution in chem ical processes both in a laboratory and industrial scale For sufficiently old raw materials it can be easily assumed that naturally occurring decay chains are in secular equilibrium state

Radioactive Waste Phosphogypsum Free America

Phosphogypsum is a radioactive toxic waste created by the fertilizer industry Phosphogypsum is stored in stacks rather than placed in a landfill or recycled because the Environmental Protection Agency EPA has determined the radon gas it emits presents an unacceptable risk to public health Yet even in stacks phosphogypsum poses a

Treatment of phosphogypsum waste using suitable organic PubMed

Phosphogypsum PG is a residue of the phosphate fertilizer industry that has relatively high concentrations of harmful radioactive materials The reduction in concentration of the radionuclides from PG was investigated The removal process is based on leaching of radionuclides using suitable organi …

Radioactivity of Phosphogypsum in South West of Spain DeepDyve

Phosphogypsum is the by product of producing phosphoric acid by reacting phosphate rock with sulphuric acid In the south west of Spain and near the town of Huelva there is a big industrial complex with some factories devoted to the production of phosphoric acid which produce annually 3 x 10 6 metric tonnes of phosphogypsum Of this amount 80% is stored in nearby sites named gyp stacks

Phân bón Wikipedia tiếng Việt

Phân bón là Chất Dinh Dưỡng do con người bổ sung cho cây trồ phân bón chứa nhiều chất dinh dưỡng cần thiết cho cây Các chất dinh dưỡng chính trong phân là đạm lân và kali gọi là nhóm nguyên tố đa lượài các chất trên còn có các nhóm nguyên tố vi lượ

Radiochemistry of Florida phosphogypsum Semantic Scholar

The natural radioactivity of Brazilian phosphogypsum M Taddei Environmental Science 2024 Phosphogypsum is a high volume by product from the phosphoric acidindustries containing naturally occurring radionuclides Envisaging the usesof phosphogypsum a characterization of this material in… Expand 47 Save Alert

Guest Op/Ed Phosphogypsum and Radiation The Bradenton Times

Phosphate companies have dumped in excess of 900 million tons of radioactive wastes in Florida and are producing over 30 million tons of phosphogypsum waste annually as the industry continues to expand its dumping operations Phosphogypsum has no economic value because of its impure content Phosphogypsum has a high radium content

Phosphogypsum is radioactive Sample Clauses Law Insider

Phosphogypsum is radioactive Phosphogypsum has very high levels of gross alpha and beta radiation 10 to 100 pCi/g relative to levels in typical soils approximately 1 pCi/g 265 Radium 226

EPA Approves Use of Phosphogypsum in Road Construction

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

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