A treatment method for water bodies polluted by radioactive iodide ions

A technology of ion pollution and radioactive iodine, which can be used in radioactive purification, nuclear engineering, etc., and can solve the problem of low utilization efficiency of adsorbents

Inactive Publication Date: 2021-07-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But nano Cu 2 O / Cu-C is used in a single-stage adsorption process, and the utilization efficiency of the adsorbent is low

Method used

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  • A treatment method for water bodies polluted by radioactive iodide ions

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Effect test

Embodiment 1

[0034] Embodiment 1: utilize described method to process the distilled water that contains 5.00mg / L radioactive iodide ion. The volume of water polluted by radioactive iodide ions added to the reactor is 200mL, and the nanometer Cu in the reactor 2 The dosage of O / Cu-C adsorbent is 1.0g / L. The dilution factor F was chosen to be 0.200. The mechanical stirring speed of the first-stage adsorption is 200 rpm. The contact time between the adsorbent and the water polluted by radioactive iodide ions is 90 minutes. The static settling time of the adsorbent in the stage of draining out the old adsorbent is 3 minutes. The flow rate of the pump to discharge the old adsorbent is 80mL / min, and the volume of the solution taken by the old adsorbent out of the reactor is 10.0mL. Nano-Cu in the second-stage adsorption of the two-stage countercurrent adsorption process 2 The dosage of O / Cu-C adsorbent is 1.0g / L. In the effluent stage, the effluent volume is 160mL. The specific operation ...

Embodiment 2

[0035]Embodiment 2: Utilize described method to process the distilled water water body containing 20.0mg / L radioactive iodide ion. The volume of water polluted by radioactive iodide ions added to the reactor is 200mL, and the nanometer Cu in the reactor 2 The dosage of O / Cu-C adsorbent is 1.0g / L. The dilution factor F was chosen to be 0.400. The mechanical stirring speed of the first-stage adsorption is 200 rpm. The contact time between the adsorbent and the water polluted by radioactive iodide ions is 120min. The static settling time of the adsorbent in the stage of draining out the old adsorbent is 5 minutes. The flow rate of the pump to discharge the old adsorbent is 100mL / min, and the volume of the solution taken away by the old adsorbent out of the reactor is 10.0mL. Nano-Cu in the second-stage adsorption of the two-stage countercurrent adsorption process 2 The dosage of O / Cu-C adsorbent is 1.0g / L. In the effluent stage, the effluent volume is 160mL. The specific o...

Embodiment 3

[0036] Embodiment 3: Utilizing the method to treat tap water containing 2.00 mg / L radioactive iodide ions. The volume of water polluted by radioactive iodide ions added to the reactor is 200mL, and the nanometer Cu in the reactor 2 The dosage of O / Cu-C adsorbent is 1.0g / L. The dilution factor F was chosen to be 0.200. The mechanical stirring speed of the first-stage adsorption is 200 rpm. The contact time between the adsorbent and the water polluted by radioactive iodide ions is 60 minutes. The static settling time of the adsorbent in the stage of draining out the old adsorbent is 3 minutes. The flow rate of the pump to discharge the old adsorbent is 80mL / min, and the volume of the solution taken by the old adsorbent out of the reactor is 10.0mL. Nano-Cu in the second-stage adsorption of the two-stage countercurrent adsorption process 2 The dosage of O / Cu-C adsorbent is 1.0g / L. In the effluent stage, the effluent volume is 160mL. The specific operation process of the ex...

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Abstract

The invention relates to a method for treating radioactive iodine ion polluted water bodies. The bottom of the two-stage countercurrent adsorption reactor is equipped with a cone angle; the stirring blade is controlled by the agitator, the top of the reactor is equipped with a feed inlet, and the side is a water outlet, which is drained by gravity; The peristaltic pump is connected, and by adjusting the speed, the adsorbent precipitated at the bottom of the cone is discharged through the silica gel tube with a small amount of liquid; a certain amount of water remains in the reactor when the water is discharged; the volume of the retained solution after each discharge of water is defined and the solution in the reactor The ratio of the total volume V is the dilution factor F, and the effluent volume should be (1‑F)V. Each cycle is divided into five stages: water inlet process, primary adsorption, draining old adsorbent, adding new adsorbent, secondary adsorption, and water discharge; making full use of the adsorption performance of the adsorbent, reducing the dosage of adsorbent, and being able to It is an economical and practical method to remove iodide ions in radioactive water to achieve high removal rate and decontamination factor.

Description

technical field [0001] The invention relates to a method for treating radioactive iodide ion polluted water bodies, which uses a novel two-stage countercurrent adsorption process to treat radioactive iodine ions in water bodies. Background technique [0002] With the rise of nuclear power and the increase of nuclear facilities, as well as the wide application of radioactive iodine in fields such as medicine, industry, agriculture and scientific research, the risk of water bodies being polluted by radioactive iodine nuclides is increasing. The iodine nuclides released into the water body are mainly iodide ions, so it is necessary to establish a treatment method for radioactive iodide ions to remove it from radioactively polluted water bodies to protect the environment and human health. [0003] The adsorption method is used to remove radioactive iodide ions in water, which has the advantages of simple process, low energy consumption, and cleanliness. [0004] Nano-cuprous ox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/12
CPCG21F9/12
Inventor 顾平张晓媛周师帅张光辉董丽华侯立安
Owner TIANJIN UNIV
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