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
Building forests from phosphogypsum Updated September 3 2021 They say sometimes you can t see the forest for the trees Or in this case the gypstack Phosphogypsum is a powdery gypsum byproduct of the phosphate fertilizer production process Huge piles of the material known as gypstacks are found at phosphate sites worldwide including
Reactive silica additives such as clays can increase the filterability of phosphogypsum PG during wet phosphoric acid production from phosphate rock PR In this study the effect of adding inexpensive fly ash waste 34 kg per t PR together with lower quantities of pure silica kg per t PR on the radioactivity of PG was investigated The addition of fly ash waste/pure
The present work is directed to characterize the phosphogypsum PG wastes by means of in situ atmospheric radon measurements gross alpha and gamma ray spectrometry measurements
The report indicates it will allow reuse of phosphogypsum at radioactivity levels similar to what is found in the stacks around Central Florida The state is home to about two dozen stacks
The radionuclides present in phosphate ore phosphogypsum and soil samples in the vicinity of a phosphate fertilizer plants in Nigeria were identified and their activity concentration determined to assess the potential radiation impact on the environment due to fertilizer production The mean activity concentration of 238U 232Th and 40K radionuclides in
Depending on the quality of the rock source phosphogypsum can contain as much as 60 times the levels normally found prior to processing The most important source of phosphogypsum radioactivity is reported to be 226 Ra The storage of phosphogypsum without any prior treatment requires large land areas and can cause serious environmental
The concentrations of 238U 226Ra 232Th and 40K maintained in phosphate rock PR phosphoric acid PA and phosphogypsum PG samples and its possible radiation hazards have been measured The radionuclides in phosphate rock have been redistributed unsymmetrically between phosphoric acid and phosphogypsum during the production process
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 pollution but also wastes resources
Research shows that phosphogypsum can be reasonably designed transformed and used in different the radioactivity contained in phosphogypsum should be paid attention to because it has an impact on humans and the environment We believe that this research provides a comprehensive and systematic overview for future research on
phosphogypsum samples have been crushed and pulverized to a ne powder with particles< 50 100 μ m then dried for 24 h at 105 °C nally they were cooled and stored in a
DOI / Corpus ID 202179273; Phosphogypsum utilization in fired bricks Radioactivity assessment and durability article{Ajam2019PhosphogypsumUI title={Phosphogypsum utilization in fired bricks Radioactivity assessment and durability} author={Lasaad Ajam and Abdurahman Hassen and Nafa{^a} Reguigui} journal={Journal of
The concentrations of 238U 226Ra 232Th and 40K maintained in phosphate rock PR phosphoric acid PA and phosphogypsum PG samples and its possible radiation hazards have been measured The radionuclides in phosphate rock have been redistributed unsymmetrically between phosphoric acid and phosphogypsum during the production process
Phosphogypsum PG the main industrial by product of phosphate fertilizer industry primarily consists of calcium sulfate dihydrate However it contains various impurities with variable quantities depending on the origin of the phosphate rock The radioactivity varies by phosphate rock type and is primarily caused by the U 238 and Th 232
This study investigates the possible use of phosphogypsum a substantial byproduct of phosphate fertilizers as a green building material With an estimated yearly output of 5 million tons phosphogypsum poses environmental hazards when discharged as a pollutant However inventive ways can offset its negative consequences by reusing waste in a variety of
The concentrations of 238U 226Ra 232Th and 40K maintained in phosphate rock PR phosphoric acid PA and phosphogypsum PG samples and its possible radiation hazards have been measured
The chemical and radiological characterization of the radioactive isotopes present in phosphogypsum was performed by using inductively coupled plasma mass spectrometry ICP MS and the gamma spectrometry technique The radioactivity of the Polish phosphogypsum was then compared with the radioactivity of the phosphogypsum waste
Phosphogypsum PG is a waste product of phosphate fertilizer and phosphoric acid industries Vast quantities of the waste product are generally left stockpiled on the ground or discharged into rivers or ponds and pose serious environmental concerns and radioactivity properties; thus using raw PG alone as a backfill or embankment
This research aims to characterize the content of natural occurring radionuclides in phosphogypsum stacks at Imbituba Santa Catarina state Brazil Natural radioactivity in phosphates phosphogypsum and natural waters in Morocco Journal of Environmental Radioactivity 54 2011 pp 231 242
According to a previous study Lysandrou and Pashalidis 2008 which was focused on the uranium leachability from phosphogypsum there was a significant effect of the salinity on the uranium leachabiliby and the solubility of on that the presented study was initiated to investigate in more detail the impact of the salinity/ionic
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 and compared with those given in the literature for some other countries in light of permissible radiation dose rates A measurement of the radioactivity content of
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