High-technetium acid radical adsorbent as well as synthesis method and application thereof in radioactive wastewater treatment

A synthesis method and technology of pertechnetic acid radicals, which are applied in the direction of adsorption of water/sewage treatment, radioactive pollutants, water/sewage treatment, etc., can solve the problems of increasing use costs and safety risks, and achieve fast adsorption kinetics, easy regeneration, The effect of high adsorption capacity

Active Publication Date: 2017-05-31
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, thorium is contained in the NDTB-1 cationic framework material. As a radioactive substance, radiation prote...

Method used

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  • High-technetium acid radical adsorbent as well as synthesis method and application thereof in radioactive wastewater treatment
  • High-technetium acid radical adsorbent as well as synthesis method and application thereof in radioactive wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In a beaker, 0.34 gram of silver nitrate and 0.29 gram of tetrakis [4-(1-imidazolyl) phenyl] methane are dissolved in 20 milliliters of acetonitrile, then add 20 milliliters of water; The temperature was raised to 90°C at a rate of °C / h, kept for 4 days, and then cooled to room temperature at a rate of 1.25°C / h. Wash with acetonitrile and water, filter, and oven-dry at 50 °C for 12 hours to obtain pertechnetate adsorbent with a yield of 60%.

Embodiment 2

[0028] In a beaker, 0.68 gram of silver nitrate and 0.29 gram of four [4-(1-imidazolyl) phenyl] methane are dissolved in 20 milliliters of acetonitrile, then add 20 milliliters of water; The temperature was raised to 90°C at a rate of °C / h, kept for 4 days, and then cooled to room temperature at a rate of 1.25°C / h. Wash with acetonitrile and water, filter, and oven-dry at 50 °C for 12 hours to obtain pertechnetate adsorbent with a yield of 54%.

Embodiment 3

[0030] In a beaker, 1.36 grams of silver nitrate and 0.29 grams of tetrakis [4-(1-imidazolyl) phenyl] methane were dissolved in 20 milliliters of acetonitrile, then 20 milliliters of water were added; The temperature was raised to 90°C at a rate of °C / h, kept for 4 days, and then cooled to room temperature at a rate of 1.25°C / h. Wash with acetonitrile and water, filter, and oven-dry at 50 °C for 12 hours to obtain pertechnetate adsorbent with a yield of 38%.

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Abstract

The invention discloses a high-technetium acid radical adsorbent as well as a synthesis method and application thereof in radioactive wastewater treatment. The synthesis method comprises the following steps: by taking silver nitrate and tert[4-(1-imidazolyl) phenyl] methane as a raw material and an organic solvent and water as mediums, performing hydrothermal reaction; after the reaction is completed, washing, filtering a reaction liquid, and drying obtained filter cakes, so as to obtain the high-technetium acid radical adsorbent. The high-technetium acid radical adsorbent disclosed by the invention is of a porous three-dimensional unlimited extension structure, and high-technetium acid radicals can be effectively exchanged with free nitrate inside pores, therefore, the radioactive wastewater can be efficiently treated.

Description

technical field [0001] The invention belongs to the field of radioactive waste water treatment, and in particular relates to a pertechnetate adsorbent, a synthesis method thereof and an application in treating waste water containing pertechnetate. Background technique [0002] The radionuclide technetium-99 is a long-lived fission product with a half-life of 2.13×10 5 years, with long-term potential environmental hazards. In nuclear waste, technetium-99 is mainly composed of pertechnetate anion TcO with strong water solubility and high stability. 4 − form exists. Currently the most widely used form of nuclear waste storage is completely unable to block TcO 4 − , and technetium can use Tc with higher vapor pressure in the spent fuel reprocessing process 2 o 7 Therefore, technetium-99 is one of the most easily leaked radionuclides in nuclear waste, and its migration ability in the natural environment is extremely strong, almost unhindered. At the same time, there are m...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/22C02F1/28C02F101/20
CPCB01J20/226C02F1/28C02F1/285C02F2101/006C02F2101/20
Inventor 肖成梁王殳凹盛道鹏朱琳
Owner SUZHOU UNIV
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