Phosphogypsum radiation

Phosphogypsum radiation

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Radiochimica Acta Ingenta Connect Table Of Contents

Uranium sorption from waste solutions by Talc Phosphogypsum ferri silicate synthetic new sorbent pp 93 106 14 Authors Hagag Mohammed S Esmaeel Shaimaa M Salem Fatma Zaki Salah A Ali Amr H Add to favourites Favourites ADD Investigation of Re VII diffusion in Tamusu clayrock core by through diffusion method

Guest Op/Ed Phosphogypsum and Radiation The Bradenton Times

Phosphogypsum stacks are located in Louisiana Idaho Illinois North Carolina Arkansas and Florida 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

Natural radioactivity and radiation hazard assessment of industrial

This work is a first contribution to the knowledge of natural radionuclides 226 Ra 238 U 40 K and 232 Th activities in phosphate rock NORM phosphogypsum and phosphogypsum foam TENORM from the coastal fertilizer plants of Gabes Southeastern Tunisia and the assessment of their radiation hazards on human health and the surrounding environment

Evaluating radiation risks and resource opportunities associated with

Five clusters were formed a red cluster phosphogypsum recycling in the construction industry green cluster radiation pollution problem of phosphogypsum and phosphate fertilizers yellow cluster

Plants Free Full Text Impacts of Phosphogypsum Soluble Fertilizer

Legumes play critical dual roles in grazed grassland ecosystems providing nitrogen inputs and high quality feed for grazing livestock However many species fail to persist in acidic low fertility soils A glasshouse study was conducted to investigate the response of lucerne Medicago sativa to phosphogypsum PG lime and soluble P S fertilizer PS application to two soils Phosphorus

EPA approves use of radioactive phosphogypsum in roads reversing long

The Environmental Protection Agency s limits on using phosphogypsum date to 1989 Phosphate mining a leading industry in Central Florida involves pulling up rocks that hold uranium and

The radiological impact of phosphogypsum stockpile in Wiślinka

The essence of radiotoxicity of the phosphogypsum is both gamma radioactivity and high content of natural alpha radioactive elements 234 U 235 U 238 U 226 Ra 210 Po and also beta emitter 210 Pb which could be leached by rain and bioaccumulated in plants and animals as well as in humans

Variations of radon and airborne particulate matter near three large

Approximately 1 billion tons of phosphogypsum PG a by product of the fertilizer industry are currently stacked in Florida PG emits radon gas which is a risk factor for lung cancer and can also increase particulate matter PM associated non cancer mortality in exposed individuals We measured concentrations of atmospheric radon and particulate matter near PG stacks and their short term

Applied Sciences Free Full Text Phosphogypsum Recycling A Review

The Environmental Protection Agency prohibits the use of phosphogypsum because of its radioactivity For example phosphogypsum from Central Florida has an average of 26 pCi/g radium and that from North Florida has 10 pCi/g radium

Process for reducing radioactive contamination in phosphogypsum

The Department of Energy s Office of Scientific and Technical Information

The use of phosphogypsum in Syrian cement industry Radiation dose to

Radiation dose assessment due to the presence of phosphogypsum PG in cement was investigated The assessment was performed using appropriate radiation exposure model based on

Radioactivity and chemical characteristics of Alberta phosphogypsum

The PG was elevated in total content of Ag Au Ca Cd P S Se Sr U and some of the light rare earth elements and Y relative to shale Average 226 Ra activity determined by the radon emanation method was 890 Bq kg −1 Activity of 212 Pb in equilibrium with 228 Th was Bq kg −1

The application of phosphogypsum in agriculture and the PubMed

This radionuclide in soil tilled with phosphogypsum used for agricultural purposes varied from 50 to 479 Bq kg 1 average 205 Bq kg 1 while in the regular soil of cultivated fields it varied from 37 to 54 Bq kg 1 average 48 Bq kg 1

TENORM is on the Regulatory Agenda in Multiple States

Evaluating the impacts of new or proposed regulations requires an understanding of the factors that generate TENORM in different types of waste as well as background levels of radioactivity TENORM content can vary considerably depending on the waste source pipe/tank scale waste phosphogypsum or combustion residuals Moreover

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

Minerals Free Full Text Comparing Permeability and Drying Shrinkage

Fly ash FA and ground granulated blast furnace slag GGBS are the most widely used mineral admixtures in engineering However their roles in concrete under the equal strength grade a common comparison method in engineering were seldom reported This study investigated the chloride ion permeability and drying shrinkage of concrete samples containing FA or GGBS under an equal strength grade

Radioactivity of Phosphogypsum in South West of Spain Radiation

Abstract 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

PDF RADIATION RISKS FROM SELECTED USES OF BY PRODUCT PHOSPHOGYPSUM Nucleus

Phosphate rock is naturally radioactive and contains uranium series radionuclides Phosphogypsum PG is a by product of the production of phosphoric acid for phosphate fertilizer industry PG is also naturally radioactive and contains uranium and uranium decay products notably radium Ra 226 Current PG management in US is land disposal in stacks

Subpart R National Emission Standards for Radon Emissions From

Phosphogypsum is a solid waste byproduct that results from processing phosphate ore to make phosphoric acid that is later used in fertilizer Because the phosphate ore contains uranium and radium phosphogypsum also contains these radionuclides The radium is of particular concern because it decays to form radon a cancer causing radioactive gas

A comparative study of alternative methods for 210Pb determination in

The accurate determination of the levels of 210Pb in environmental samples atmospheric aerosols waters soils biota etc is essential due to its multiple applications in geochronology radiation protection groundwaters flows air masses movement etc

Extraction of natural radionuclides in TENORM waste phosphogypsum

The radionuclide 226 Ra from the decay of 238U is one of main contributors of the radiation in phosphogypsum it is present as a trace material and chemically linked to SO42 since radium has chemical properties similar to calcium producing radium sulfates Radium and calcium sulfates have different solubility when exposed to an acid solution

Phosphogypsum Management Perspectives Massive Valorization or Massive

Five clusters were formed a red cluster phosphogypsum recycling in the construction industry green cluster radiation pollution problem of phosphogypsum and phosphate fertilizers yellow cluster

Detailed Data

The effective dose assigned to evaluate whole body health effects upon exposure to radioactivity and is employed exclusively for radiation protection Dose is shown in Sv sievert units The effective dose is calculated on the basis of the dose calculation method of the RP 122 European Commission assuming typical work environments

Stacks water and waste What the Piney Point leak means for WFLA

Highly contaminated water being released from Phosphogypsum in Manatee County Phosphogypsum is the radioactive waste left over during phosphate mining formed as a by product from

In Situ Remediation of Phosphogypsum with Water Washing Pre Treatment

The overall results proved that in treated phosphogypsum based cemented paste backfill TCPB the altered particle size distribution can alleviate the shear thinning characteristic The mechanical properties were significantly optimized of which a maximum increase of 183% of stress value was observed

PDF RADIATION RISKS FROM SELECTED USES OF BY PRODUCT PHOSPHOGYPSUM Nucleus

EPA defines Phosphogypsum 40CFR61 Subpart R …as a radioactive waste product that results from processing phosphate ore to make phosphoric acid that is later used in fertilizer Because the phosphate ore contains uranium and radium phosphogypsum also contains these radionuclides The radium is of particular concern because it

Recycling of radioactive phosphogypsum wastes ScienceDirect

Effect of radiation contamination of phosphogypsum Radium 226 is present in various concentrations in all soils and rocks and is widely distributed in the environment It is extracted from soils by plants and enters the human food chain [3] Radon is one of the most dangerous radioactive gases in the environment

Radiation hazard indices in the application of phosphogypsum SBPR

Phosphogypsum PG a by product from the phosphoric acid industry is being worldwide stockpiled posing environmental problems Viability of the PG safe re use in civil construction has been studied as PG can contain natural radionuclides in significant concentrations We propose a policy for using PG as a building material limiting the total concentration of 226Ra plus 228Ra by mixing PG

Measurement and evaluation of natural radioactivity in phosphogypsum in

PG contains significant quantities of radioactive materials such as 238 U and 226 Ra Phosphogypsum produced from sedimentary phosphate rock contains typically activity concentrations of 238 U in the range 100 600 Bq × kg −1 and 226 Ra in the range 500 1300 Bq × kg −1 [ 5 ]

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