Method for extracting technetium from molybdenum solution by means of activated carbon materials

An activated carbon and solution technology, applied in the field of radionuclide separation, can solve the problems of complex material structure, poor radiation resistance, poor consistency of chromatographic column, etc., and achieve stable adsorption separation performance, good radiation resistance, low price and easy to use. the effect

Inactive Publication Date: 2017-08-01
HTA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

ABEC-2000 also has some disadvantages, such as its poor radiation resistance, complex material structure, and poor consistency of chromatographic columns made of it.

Method used

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  • Method for extracting technetium from molybdenum solution by means of activated carbon materials
  • Method for extracting technetium from molybdenum solution by means of activated carbon materials

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Slowly add 50mL of 6mol / L NaOH aqueous solution to 5g of natural molybdenum oxide powder after thermal neutron activation, so that the molybdenum oxide powder is fully dissolved, and the 99 Mo decays into 99m Tc and 99 Tc, to obtain a mixed solution containing molybdenum and technetium. The hydroxide ion concentration in the obtained solution was 4.6 mol / L. Use 3g of 200 mesh coconut shell activated carbon to make a chromatographic column, pump the mixed solution containing molybdenum-technetium through the chromatographic column at a flow rate of 10mL / min, and recover the molybdenum-containing effluent. At this point, technetium is adsorbed on the chromatography column. Use 20 mL of 5 mol / L NaOH solution to pump through the chromatographic column at a flow rate of 10 mL / min to wash a small amount of molybdenum attached thereto. Finally, at a flow rate of 10 mL / min, pump through 10 mL of sterile water for injection to elute technetium on the column. The obtained el...

Embodiment 2

[0050] Slowly add 50mL of 4mol / L NaOH aqueous solution to 5g of natural molybdenum oxide powder after thermal neutron activation, so that the molybdenum oxide powder is fully dissolved, and the 99 Mo decays into 99m Tc and 99 Tc, to obtain a mixed solution containing molybdenum and technetium. The hydroxide ion concentration in the obtained solution was 2.6 mol / L. Use 1g of 200 mesh coconut shell activated carbon to make a chromatographic column, pump the mixed solution containing molybdenum-technetium through the chromatographic column at a flow rate of 10mL / min, and recover the molybdenum-containing effluent. At this point, technetium is adsorbed on the chromatography column. Use 20 mL of 5 mol / L NaOH solution to pump through the chromatographic column at a flow rate of 10 mL / min to wash a small amount of molybdenum attached thereto. Finally, at a flow rate of 10 mL / min, pump through 10 mL of sterile water for injection to elute technetium on the column. The obtained el...

Embodiment 3

[0052] Slowly add 50mL of 6mol / L NaOH aqueous solution to 5g of natural molybdenum oxide powder after thermal neutron activation, so that the molybdenum oxide powder is fully dissolved, and the 99 Mo decays into 99m Tc and 99 Tc, to obtain a mixed solution containing molybdenum and technetium. The hydroxide ion concentration in the obtained solution was 4.6 mol / L. Use 3 g of coal-based activated carbon to make a chromatographic column, pump the mixed solution containing molybdenum-technetium through the chromatographic column at a flow rate of 10 mL / min, and recover the molybdenum-containing effluent. At this point, technetium is adsorbed on the chromatography column. Use 20 mL of 5 mol / L NaOH solution to pump through the chromatographic column at a flow rate of 10 mL / min to wash a small amount of molybdenum attached thereto. Finally, at a flow rate of 10 mL / min, pump through 10 mL of sterile water for injection to elute technetium on the column. The obtained eluent is a ...

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Abstract

The invention belongs to the field of radioactive nuclide separation, and particularly relates to a method for extracting technetium from a molybdenum solution by means of activated carbon materials. The method comprises the following steps that 1, a molybdenum and technetium mixed solution with the hydroxide ion concentration larger than or equal to 1 mol/L is prepared; 2, technetium in the molybdenum and technetium mixed solution obtained in the first step is adsorbed through the activated carbon materials; 3, a small amount of technetium which adheres to the surfaces of the activated carbon materials is washed with a washing solution; and 4, technetium adsorbed to the surfaces of the activated carbon materials is desorbed with a leaching solution with the hydroxide ion concentration smaller than 1 mol/L. The method has the advantages that the solid-phase separation material is good in radiation-resistant performance, stable in adsorption and separation performance, low in price and easy to obtain.

Description

technical field [0001] The invention belongs to the field of separation of radionuclides, and in particular relates to a method for extracting technetium from a molybdenum solution by using activated carbon materials. Background technique [0002] 99m Tc has become one of the most commonly used radionuclides in nuclear medicine because of its relatively pure low-energy γ-rays (141keV) and short half-life (6.03h). Currently, 99m Tc mainly through 99 Mo / 99m Obtained by Tc chromatographic generator. In the generator, the parent nuclide 99 Mo decays to 99m The efficiency of Tc is 88.6%, and the remaining 11.4% decays directly to 99 Tc. this kind 99 Mo / 99m Tc generator, which can convert daughter nuclides 99m Tc(T 1 / 2 = 6h) from the parent nuclide 99Mo (T 1 / 2 =66.7h) extracted. In this way, short-lived radionuclides can be provided to areas far from nuclear facilities through long-distance transportation 99m Tc, and can do daily shower 99m Tc, like milking a co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/24C22B61/00C22B34/34
CPCC22B3/24C22B34/34C22B61/00Y02P10/20
Inventor 阳国桂胡骥罗联哲卿晶
Owner HTA CO LTD
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