Method for removing radioactive cobalt by using graphene loaded nanometer zero-valent iron composite material

A technology of nano-zero-valent iron and composite materials, which is applied in the fields of radioactive purification and nuclear engineering. It can solve the problems of high surface energy, easy agglomeration, and difficult separation, and achieve the effects of easy recovery, mild experimental conditions, and large adsorption capacity.
CN103578593AActive Publication Date: 2014-02-12TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2014-02-12

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Abstract

The invention discloses a method for removing radioactive cobalt by using a graphene loaded nanometer zero-valent iron composite material, and belongs to the technical field of radioactive waste treatment. The method comprises the following steps: adding the graphene loaded nanometer zero-valent iron composite material into a water sample containing the radioactive nuclide Co, vibrating the mixture at constant temperature, and removing the radioactive nuclide Co after a certain time. The graphene loaded nanometer zero-valent iron composite material used in the method disclosed by the invention can absorb and select the nuclide, is large in adsorption capacity, and less susceptible to desorption; the absorbed particle has the magnetic property, easy to recycle, small in size, and convenient to store temporarily, the experiment condition is mild, and therefore the composite material has an advantage in the aspect of removing the nuclide Co in the radioactive wastewater. The maximal equilibrium adsorption capacity of the graphene loaded nanometer zero-valent iron composite material used in the method disclosed by the invention on Co is 114.08mg / g.
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Description

technical field

[0001] The invention belongs to the technical field of radioactive waste treatment, and in particular relates to a method for removing radioactive cobalt by using a graphene-loaded nano-zero-valent iron composite material. Background technique

[0002] The safe disposal of radioactive waste is one of the major environmental issues facing the world today. Among them, radionuclides 60 Co is a neutron activation product in a nuclear reactor and a medical gamma radiation source, which can be used in radiotherapy and chemotherapy. 60 Co has the characteristics of high toxicity, long half-life (5.27 years), and high gamma ray energy (average 1.25MeV). If it is not properly disposed of, it will have a great impact on the environment and human health.

[0003] At present, the main treatment technologies of radioactive wastewater include chemical precipitation method, evaporation concentration method, ion exchange method, soil infiltration, membrane treatment method...

Claims

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