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High-efficient environmental-friendly treatment method of radioactive waste water

A radioactive waste water and treatment method technology, applied in radioactive purification, nuclear engineering, etc., can solve the problems of poor membrane stability and low interception rate of radionuclide interest, and achieve good membrane stability, less pollution, and high interception rate Effect

Inactive Publication Date: 2016-10-26
辽宁海华能源装备集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent (200410042589.8) discloses a method for treating radioactive wastewater, including three steps of pretreatment, membrane separation and posttreatment; It is carried out in the nanofiltration membrane element, and the post-treatment is carried out in the anion-cation exchange resin treatment system. This method can effectively remove radioactive substances in water, with low cost and convenient operation, but the membrane used has poor stability and the rejection rate of radionuclide interest is low. Low

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0028] A highly efficient and environmentally friendly radioactive wastewater treatment method, comprising the following steps:

[0029] (1) Preparation of graphene oxide-based composite film:

[0030] a) Soak the alumina in a silane coupling agent ethanol solution with a concentration of 0.2mM for 2h, take it out and heat-treat it at 120°C for 0.5h to obtain alumina pre-modified by the silane coupling agent;

[0031] b) Put graphene oxide in water and stir to disperse, add tris-hydrochloric acid solution, adjust the pH of the solution to 8-9, and sonicate for 0.5h under 500W power to obtain graphene oxide with a concentration of 0.1mg / mL Dispersions;

[0032] c) Add dopamine hydrochloride solution to the graphene oxide dispersion prepared in step b), stir and react at 20°C for 1h, centrifuge for 3-5 times, and then dry at 40°C to obtain a polydopamine-graphene oxide composite , wherein the mass ratio of graphene oxide to dopamine is 2:1;

[0033] d) mixing and stirring the...

Embodiment 2

[0039] A highly efficient and environmentally friendly radioactive wastewater treatment method, comprising the following steps:

[0040] (1) Preparation of graphene oxide-based composite film:

[0041] a) Soak polytetrafluoroethylene in a silane coupling agent ethanol solution with a concentration of 0.2 mM for 2 hours, take it out and heat-treat it at 150° C. for 2 hours to obtain polytetrafluoroethylene pre-modified by a silane coupling agent;

[0042] b) Stir and disperse graphene oxide in water, add tris-hydrochloric acid solution, adjust the pH of the solution to 8-9, and sonicate for 2 hours under 1000W power to obtain a graphene oxide dispersion with a concentration of 3 mg / mL ;

[0043] c) Add dopamine hydrochloride solution to the graphene oxide dispersion prepared in step b), stir and react at 80°C for 6h, centrifuge for 3-5 times, and then dry at 60°C to obtain polydopamine-graphene oxide composite , wherein the mass ratio of graphene oxide to dopamine is 8:1;

[0...

Embodiment 3

[0050] A highly efficient and environmentally friendly radioactive wastewater treatment method, comprising the following steps:

[0051] (1) Preparation of graphene oxide-based composite film:

[0052] a) Soak silicon oxide in a silane coupling agent ethanol solution with a concentration of 0.2mM for 2h, take it out and heat treat it at 130°C for 0.8h to obtain silicon oxide pre-modified by a silane coupling agent;

[0053] b) Put graphene oxide in water and stir to disperse, add tris-hydrochloric acid solution, adjust the pH of the solution to 8-9, and sonicate for 0.8h under 600W power to obtain graphene oxide with a concentration of 0.5mg / mL Dispersions;

[0054] c) Add dopamine hydrochloride solution to the graphene oxide dispersion prepared in step b), stir and react at 30°C for 2h, centrifuge for 3-5 times, and then dry at 45°C to obtain a polydopamine-graphene oxide composite , wherein the mass ratio of graphene oxide to dopamine is 4:1;

[0055] d) mixing and stirri...

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Abstract

The invention discloses a high-efficient environmental-friendly treatment method of radioactive waste water. The high-efficient environmental-friendly treatment method comprises pretreatment, membrane separation and post treatment, wherein the pretreatment comprises sequentially performing activated carbon filtration and ultra filtration membrane filtration; the membrane separation is oxidized graphene-based composite membrane filtration, wherein an oxidized graphene-based composite membrane is prepared on a schistose porous carrier pre-modified by a silane coupling agent after oxidized graphene is compounded with polydopamine, and a membrane-layer two-dimensional water channel is smaller than 0.45nm; and the post treatment is second-class reverse osmosis treatment, water conductivity is smaller than or equal to 40<mu>s / cm through the second-class reverse osmosis treatment, and a discharging requirement of radioactive substances is met. The method disclosed by the invention not only can effectively remove the radioactive substances in the waste water, the stability is good, the operation is simple and the cost is low.

Description

Technical field: [0001] The invention relates to the field of radioactive wastewater treatment, in particular to an efficient and environment-friendly radioactive wastewater treatment method. Background technique: [0002] The rapid development of my country's economy and the continuous depletion of fossil energy make the large-scale development of nuclear energy an inevitable choice. After the Fukushima nuclear accident in Japan in March 2011, the importance of nuclear safety and nuclear waste disposal has attracted more and more attention. With the rapid development of my country's nuclear energy industry, the demand for economical and efficient new technologies for radioactive waste treatment is becoming more and more urgent. In addition, the application of radionuclides in military, energy, industry, agriculture, medicine and other scientific research is becoming more and more urgent. The amount of radioactive waste gas, waste liquid and solid waste produced in these pro...

Claims

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Application Information

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IPC IPC(8): G21F9/12G21F9/06
CPCG21F9/06G21F9/12
Inventor 王文庆
Owner 辽宁海华能源装备集团有限公司
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