treatment process for removing radioactive thorium from

US6991731B2 - Treatment process for removing

The liquid effluent from solvent extraction contains radioactive thorium Th-231 and Th-234. This invention uses an ion exchange process to remove and concentrate the thorium. The process is designed so that the thorium remains on the ion exchange column until it decays to uranium and protactinium. These decay products are subsequently replaced by additional thorium.

Study on Thorium Removal from Effluent by

2019-11-19 · presently for treatment of low level radioactive waste are chemical treatment, membrane separation and ion-exchange. Sinha et al. demonstrated that co-precipitation process involving calcium phosphate and cerium oxalate may be used for the separation and removal of thorium from the effluents [2]. Removal of thorium from

(PDF) Remediation of Thorium (IV) from Wastewater:

2019-7-12 · Radioactive waste treatment is the most important process where the aim is to change the radio active waste characteristics. The basic concept of waste treatment involves the reduction in

Study on Thorium Removal from Effluent by

2019-11-19 · thorium decay like 228Ac and 208Tl are radioactive as compared to uranium decay. Hence, more stringent measures are to be followed in case of thorium bearing effluent treatment and disposal at Hyderabad which is a land locked area. The most common methods for low level radioactive waste treatment arising from the front

A safer and cleaner process for recovering thorium and ...

2021-3-15 · Process for the separation of thorium and rare earth elements from radioactive waste residues using Cyanex® 572 as a new extractant Hydrometallurgy , 169 ( 2017 ) , pp. 158 - 164 , 10.1016/j.hydromet.2017.01.005

Process for removing thorium and recovering vanadium

1996-1-1 · Abstract. A process for removal of thorium from titanium chlorinator waste comprising: (a) leaching an anhydrous titanium chlorinator waste in water or dilute hydrochloric acid solution and filtering to separate insoluble minerals and coke fractions from soluble metal chlorides; (b) beneficiating the insoluble fractions from step (a) on shaking tables to recover recyclable or otherwise useful ...

Separative technologies for the removal of thorium from

1993-1-1 · Several separative technologies for the removal of thorium isotopes from a waste nitric acid raffinate were evaluated. The implications of interfering ions and the efficiency of thorium recovery are described. A comparison of the various techniques studied is reported with particular reference to: (1) secondary waste, (2) scale-up, and (3 ...

STUDY ON TECHNOLOGY FOR RADIOACTIVE WASTE

2009-6-3 · radioactive waste contains Uranium (U238), Thorium (Th232), Radium (Ra226) and some heavy metals and mainly is low radioactive waste. Our project has researched and built up appropriate technology for treating and managing the radioactive waste. After researching and experimenting, we have built up four technology processes as follows:

Options For Removing Uranium & Thorium From Zircon

2017-5-31 · Options For Removing Uranium & Thorium From Zircon Mineral Sands ... • CSIRO has developed a process which reduces the radiation level of zircons by using a heat process ... • Heat pre treatment • Cold & hot Acid leaching • Nitric, sulphuric and hydrochloric acid

Method for removing radioactive substances from

The present invention relates to the treatment of potable water to remove radioactive materials, and more particularly to the subterranean removal of such radioactive materials from water adjacent a well. 2. Description of the Related Art. Water for human consumption commonly is obtained for

Study on Thorium Removal from Effluent by

2019-11-19 · thorium decay like 228Ac and 208Tl are radioactive as compared to uranium decay. Hence, more stringent measures are to be followed in case of thorium bearing effluent treatment and disposal at Hyderabad which is a land locked area. The most common methods for low level radioactive waste treatment arising from the front

Process for removing thorium and recovering vanadium

1996-1-1 · Abstract. A process for removal of thorium from titanium chlorinator waste comprising: (a) leaching an anhydrous titanium chlorinator waste in water or dilute hydrochloric acid solution and filtering to separate insoluble minerals and coke fractions from soluble metal chlorides; (b) beneficiating the insoluble fractions from step (a) on shaking tables to recover recyclable or otherwise useful ...

Thorium(IV) removal and recovery from aqueous

2020-8-26 · radioactive element, and found in small amounts in most rocks, where it is about three times abundant than ura-nium. Thorium-232 radioactive daughter products can pose human health and ecosystems risk [2]. Therefore, removal and recovery of thorium(IV) from aqueous solution is urgent and essential. Removing thorium from aqueous solution

Options For Removing Uranium & Thorium From Zircon

2017-5-31 · Options For Removing Uranium & Thorium From Zircon Mineral Sands ... • CSIRO has developed a process which reduces the radiation level of zircons by using a heat process ... • Heat pre treatment • Cold & hot Acid leaching • Nitric, sulphuric and hydrochloric acid

Selective Capture Mechanism of Radioactive Thorium from ...

Furthermore, a solvent extraction process including six extraction stages, six scrubbing stages, and six stripping stages was designed for the preparation of highly pure thorium from thorium ...

Fundamentals of Radium and Uranium Removal from

2021-6-25 · Processes for Uranium Removal RO >99% Effective but expensive Regenerate with 2-4 M NaCl after 10,000-50,000 BV Anion >95% Exchange Higher pH = greater removal. Mg2+ helps at pH > 10.6. Lime 80-99% Softening Coagulation 50-90% Effective at pH near 6 and 10 w Fe/Al Treatment Removal Comment Method

Thorium - Mining Process , Technology, Applications ...

2008-7-11 · Treatment Process for Removing Radioactive Thorium from Solvent Extraction Liquid Effluent; Project. Correlation of Thorium-232 Radiation to ATP Production Rate of Mitochondria; European Transmutation Fuels Projects

A System's Guide to the Management of Radioactive ...

2014-4-4 · A System’s Guide to the Management of Radioactive Residuals from Drinking Water Treatment Technologies Community water systems (CWSs) that use source water containing radium-226 (Ra-226), radium-228 (Ra-228), gross alpha particle activity, beta particle and photon radioactivity, or uranium must comply with the Radionuclides Rule

Method for removing radioactive substances from

The present invention relates to the treatment of potable water to remove radioactive materials, and more particularly to the subterranean removal of such radioactive materials from water adjacent a well. 2. Description of the Related Art. Water for human consumption commonly is obtained for

Treatment of radioactive spent extraction solvent by ...

2017-9-4 · Radioactive spent extraction solvent was treated by supercritical water oxidation. In this work, influences of reaction conditions on total organic carbon (TOC) removal, the volume percentage of CO2 yielded, and the distributions of radionuclides in gas, liquid and solid phase have been investigated. The results show that the TOC removal and the volume percentage of CO2 would be increased up ...

Treatment methods and comparative risks of thorium

1997-7-1 · This study was done to examine the risks of remediation and the effectiveness of removal methods for thorium and its associated radioactive decay products from various soils and wastes associated with DOE`s Formerly Utilized Sites Remedial Action Program (FUSRAP). Removal of {sup 230}Th from uranium process residues would significantly reduce the buildup of {sup 226}Ra (half-life

Thorium(IV) removal and recovery from aqueous

2020-8-26 · radioactive element, and found in small amounts in most rocks, where it is about three times abundant than ura-nium. Thorium-232 radioactive daughter products can pose human health and ecosystems risk [2]. Therefore, removal and recovery of thorium(IV) from aqueous solution is urgent and essential. Removing thorium from aqueous solution

Thorium - Mining Process , Technology, Applications ...

2008-7-11 · Treatment Process for Removing Radioactive Thorium from Solvent Extraction Liquid Effluent; Project. Correlation of Thorium-232 Radiation to ATP Production Rate of Mitochondria; European Transmutation Fuels Projects

Fundamentals of Radium and Uranium Removal from

2021-6-25 · Processes for Uranium Removal RO >99% Effective but expensive Regenerate with 2-4 M NaCl after 10,000-50,000 BV Anion >95% Exchange Higher pH = greater removal. Mg2+ helps at pH > 10.6. Lime 80-99% Softening Coagulation 50-90% Effective at pH near 6 and 10 w Fe/Al Treatment Removal Comment Method

RADIOACTIVE ELEMENT REMOVAL FROM WATER USING

2021-5-25 · Radioactive Element Removal From Water Using Graphene Oxide (Go). (May 2014) ... thorium compounds, aviation, and scrap metal processing1. 2 Treatment and decontamination of waste products and contaminated groundwater containing human-made radionuclides, among which the transuranic elements are the most toxic, is an ...

Selective Capture Mechanism of Radioactive Thorium from ...

Request PDF | On Jul 29, 2021, Lei Xu and others published Selective Capture Mechanism of Radioactive Thorium from Highly Acidic Solution by a Layered Metal Sulfide | Find, read and cite all the ...

Method for removing radioactive substances from

The present invention relates to the treatment of potable water to remove radioactive materials, and more particularly to the subterranean removal of such radioactive materials from water adjacent a well. 2. Description of the Related Art. Water for human consumption commonly is obtained for

Development of separation technology for the removal of ...

Conventional cancer drug treatments such as chemotherapy are often ineffective. The targeted cancer radiotherapy under development in Bayer AS which utilizes the radioactive element thorium-227, may give hope to cancer patients through a localized and efficient therapy within a number of cancer types.

A System's Guide to the Management of Radioactive ...

2014-4-4 · A System’s Guide to the Management of Radioactive Residuals from Drinking Water Treatment Technologies Community water systems (CWSs) that use source water containing radium-226 (Ra-226), radium-228 (Ra-228), gross alpha particle activity, beta particle and photon radioactivity, or uranium must comply with the Radionuclides Rule

Nuclear Waste Bioremediation - Stanford University

2016-8-2 · Microbes are not the only organism capable of doing remarkable metal chemistry. In a process dubbed phytoremediation, scientists harness the capabilities of plants to accumulate radioactive species instead. Singh et al. describe the use of fast-growing Vetiver grass (Vetiveria zizanoides) to absorb Sr-90 and Cs-137 from its environment. [11]

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