thorium uranium removal

thorium uranium removal

Removal of thorium and uranium from leach solutions of

2020-6-1 · The removal of radioactive elements thorium and uranium from the leach solution of ion-adsorption rare earth ores by aluminum sulfate was studied using di(2-ethylhexyl) [N-(2-ethylhexyl)aminomethyl] phosphonate (Cextrant 230, L).The extraction of thorium, uranium, rare earths, aluminum and other elements was investigated in detail, especially for uranium.

Removal of thorium and uranium from aqueous solution

2019-7-3 · Removal of thorium and uranium from aqueous solution by adsorption on hydrated manganese dioxide. Taoyuan Xiu 1,3, Zhirong Liu 1,2, Lingfang Yang 4 & Yun Wang 1,3 Journal of Radioanalytical and Nuclear Chemistry volume 321, pages 671–681 (2019)Cite this article

The Removal of Uranium and Thorium from Their Aqueous ...

The sorption of uranium and thorium from their aqueous solutions by using 8-hydroxyquinoline modified Na-bentonite (HQ-bentonite) was investigated by the batch technique. Na-bentonite and HQ-bentonite were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier Transform Infrared (FTIR) spectroscopy.

TREATMENT OF URANIUM &THORIUM BEARING

2019-11-19 · removal of uranium, thorium, radium and possibly all alpha emitting actinides. The established process was able to generate decontaminated effluent up to 1 ppm of uranium, less than 1 ppm of thorium and 35 Bq/L radium which corresponds to 0.1 Bq/g of solid for alpha and 1.6 Bq/g of solid for beta activity. ...

Fundamentals of Radium and Uranium Removal from

2021-6-25 · Uranium Removal from Drinking Water Supplies Dennis Clifford University of Houston . Important Radium Isotopes 224Ra 3.64 d Alpha Thorium 228Ra 5.7 y Beta Thorium 226Ra 1600 y Alpha Uranium Decay Series Primary Emission Radium Half Life Isotope . Important Uranium Isotopes

Separation of thorium, uranium, and rare earths from a

2020-11-1 · Test results indicate that selective precipitation was effective for the removal of thorium at a pH value approaching 5 while solvent extraction preferentially removed uranium from rare earths. Therefore, a modified experimental protocol consisting of both selective precipitation and solvent extraction was subsequently developed and implemented.

Study on Thorium Removal from Effluent by

2019-11-19 · may be used for the separation and removal of thorium from the effluents [2]. Removal of thorium from nitrate [medium by Ammonium Molybdophosphate (AMP) was studied by Ali et al 3]. AMP is an inorganic ion-exchanger having high affinity for thorium and was used in its separation from uranium.

Salvadora Persica branches biomass adsorbent for removal ...

2019-7-22 · Moreover, separation, removal and purification of uranium and thorium ions from their ores and nuclear waste have become major topics and have attracted the attention of researchers in recent years. Therefore, and due to the safety regulations and economic benefits, the separation and removal of these radioactive ions are necessary and ...

Thorium power has a protactinium problem - Bulletin of

2018-8-6 · The uranium 233 produced in thorium reactors is contaminated with uranium 232, which is produced through several different neutron absorption pathways. Uranium 232 has a half-life of 68.9 years, and its daughter radionuclides emit intense, highly penetrating gamma rays that make the material difficult to handle.

The Removal of Uranium and Thorium from Their Aqueous ...

2019-9-10 · The sorption of uranium and thorium from their aqueous solutions by using 8-hydroxyquinoline modified Na-bentonite (HQ-bentonite) was investigated by the batch technique. Na-bentonite and HQ-bentonite were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier Transform Infrared (FTIR) spectroscopy.

Removal of uranium(VI) and thorium(IV) from aqueous ...

2021-11-8 · F. Khalili, A. Khalifa, G. Al-Banna, Removal of uranium(VI) and thorium(IV) by insolubilized humic acid originated from Azraq soil in Jordan, J. Radioanal. Nucl. Chem., 311 (2017) 1375–1392. S. Seyhan, M. Merdivan, N. Demirel, Use of o-phenylene dioxydiacetic acid impregnated in Amberlite XAD resin for separation and preconcentration of ...

Fundamentals of Radium and Uranium Removal from

2021-6-25 · Uranium Removal from Drinking Water Supplies Dennis Clifford University of Houston . Important Radium Isotopes 224Ra 3.64 d Alpha Thorium 228Ra 5.7 y Beta Thorium 226Ra 1600 y Alpha Uranium Decay Series Primary Emission Radium Half Life Isotope . Important Uranium Isotopes

TREATMENT OF URANIUM &THORIUM BEARING

2019-11-19 · removal of uranium, thorium, radium and possibly all alpha emitting actinides. The established process was able to generate decontaminated effluent up to 1 ppm of uranium, less than 1 ppm of thorium and 35 Bq/L radium which corresponds to 0.1 Bq/g of solid for alpha and 1.6 Bq/g of solid for beta activity. ...

Evaluation of polybenzimidazole-based polymers for the ...

Evaluation of polybenzimidazole-based polymers for the removal of uranium, thorium and palladium from aqueous medium R Soc Open Sci. 2018 Jun 20;5(6):171701. doi: 10.1098/rsos.171701. eCollection 2018 Jun. Authors V Vijaya Kumar 1 ...

Study on Thorium Removal from Effluent by

2019-11-19 · may be used for the separation and removal of thorium from the effluents [2]. Removal of thorium from nitrate [medium by Ammonium Molybdophosphate (AMP) was studied by Ali et al 3]. AMP is an inorganic ion-exchanger having high affinity for thorium and was used in its separation from uranium.

Characterization of thorium and uranium contaminated

1994-2-1 · Soil contaminated with thorium and uranium from the grounds of a nuclear fuel manufacturing facility was subjected to remediation efforts. A light acid leach was able to remove only 30% of the thorium suggesting that the thorium was present in two or more forms.

KGS--Geological Log Analysis--The Gamma Ray Log

The thorium, uranium, and potassium curves in Tracks 2 and 3 record the quantities of these elements, which can be used in a more systematic analysis. Spectral gamma-ray log analysis is commonly made on the basis of the thorium-to-potassium (Th/K) ratio; and the thorium-to-uranium (Th/U) ratio

The Thorium Molten Salt Reactor – Thorium MSR Foundation

When including uranium extracted from the oceans it becomes an inexhaustible source of energy. But in a molten salt reactor one can also use thorium as a fuel and it is estimated that there is a factor 3 more thorium on earth that uranium. Thorium is easily accessible and at this moment is mostly a by-product of rare-earth mining.

Removal of uranium(VI) and thorium(IV) from aqueous ...

2021-11-8 · F. Khalili, A. Khalifa, G. Al-Banna, Removal of uranium(VI) and thorium(IV) by insolubilized humic acid originated from Azraq soil in Jordan, J. Radioanal. Nucl. Chem., 311 (2017) 1375–1392. S. Seyhan, M. Merdivan, N. Demirel, Use of o-phenylene dioxydiacetic acid impregnated in Amberlite XAD resin for separation and preconcentration of ...

RECOVERY OF THORIUM, URANIUM, AND RARE EARTHS

2021-11-19 · When a mixture of rare earths, thorium, and uranium at pH 1.0 in sulfate medium is passed through a column (1.5 x 12 cm) of Dowex A-1(H/sup +/), rare earths pass through. Then thorium is eluted with 6N hydrochloric acid and subsequently the uranium with 2N nitric acid.

Characterization of thorium and uranium contaminated

1994-2-1 · Soil contaminated with thorium and uranium from the grounds of a nuclear fuel manufacturing facility was subjected to remediation efforts. A light acid leach was able to remove only 30% of the thorium suggesting that the thorium was present in two or more forms.

Thorium power has a protactinium problem - Bulletin of

2018-8-6 · The uranium 233 produced in thorium reactors is contaminated with uranium 232, which is produced through several different neutron absorption pathways. Uranium 232 has a half-life of 68.9 years, and its daughter radionuclides emit intense, highly penetrating gamma rays that make the material difficult to handle.

Molten Salt Reactors - World Nuclear Association

Thorium, uranium, and plutonium all form suitable fluoride salts that readily dissolve in the LiF-BeF 2 (FLiBe) mixture, and thorium and uranium can be easily separated from one another in fluoride form. Batch reprocessing is likely in the short term, and fuel life is quoted at 4-7 years, with high burn-up.

The Thorium Molten Salt Reactor – Thorium MSR Foundation

When including uranium extracted from the oceans it becomes an inexhaustible source of energy. But in a molten salt reactor one can also use thorium as a fuel and it is estimated that there is a factor 3 more thorium on earth that uranium. Thorium is easily accessible and at this moment is mostly a by-product of rare-earth mining.

Radioactivity : Thorium Fuels

2020-3-22 · Uranium-233 breeding with slow and fast neutrons The fission of uranium-233 produces more than two secondary neutrons per capture. If one of these neutrons generates a new fission, and a second is absorbed by a thorium-232 nucleus which transforms later

KGS--Geological Log Analysis--The Gamma Ray Log

The thorium, uranium, and potassium curves in Tracks 2 and 3 record the quantities of these elements, which can be used in a more systematic analysis. Spectral gamma-ray log analysis is commonly made on the basis of the thorium-to-potassium (Th/K) ratio; and the thorium-to-uranium (Th/U) ratio

王琳-中国科学院大学-UCAS

(16) Efficient removal of uranium from aqueous solution by zero-valent iron nanoparticle and its graphene composite, J. Hazard. Mater., 2015, 第 2 作者 (17) Template-Free Synthesis and Mechanistic Study of Porous Three-Dimensional Hierarchical Uranium