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Gel spherical cesium ion adsorbent, its preparation method and application

A cesium ion and adsorbent technology, applied in the field of selective separation of metal ions, can solve the problems of complex composition, great interference of cesium ion adsorption and separation, inability to separate cesium ions from other ions, etc., and achieves low production cost and radiation resistance. And the effect of good thermal stability and high mechanical strength

Inactive Publication Date: 2016-01-20
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complex composition of the actual salt lake brine, oilfield water, and geothermal water systems, trace amounts of cesium ions coexist with various other constant ions, and the coexisting constant ions greatly interfere with the adsorption and separation of cesium ions
Based on the technology disclosed in existing patents, the separation of cesium ions from other ions in complex systems such as salt lake brine, oilfield water, and geothermal water cannot be realized

Method used

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  • Gel spherical cesium ion adsorbent, its preparation method and application
  • Gel spherical cesium ion adsorbent, its preparation method and application
  • Gel spherical cesium ion adsorbent, its preparation method and application

Examples

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preparation Embodiment 1

[0045] Prepare sodium alginate hydrosol with a mass fraction of 2%; mix sodium alginate hydrosol and rubidium silicotungstate powder at a mass ratio of 5:1 to form a sol mixture; drop the sol mixture into 4% chlorine In the calcium chloride solution, the gel is aged for 48 hours, and the gel balls are obtained after solid-liquid separation, and washed with distilled water until there is no impurity ion.

preparation Embodiment 2

[0047] Prepare sodium alginate hydrosol with a mass fraction of 2.5%; mix sodium alginate hydrosol and rubidium silicotungstate powder at a mass ratio of 100:1 to form a sol mixture; drop the sol mixture into 5% chlorine In the calcium chloride solution, the gel is aged for 12 hours, and the gel balls are obtained after solid-liquid separation, and washed with distilled water until there is no impurity ion.

preparation Embodiment 3

[0049] Prepare sodium alginate hydrosol with a mass fraction of 2.5%; mix sodium alginate hydrosol and rubidium silicotungstate powder at a mass ratio of 10:1 to form a sol mixture; drop the sol mixture into 5% chlorine In the calcium chloride solution, the gel was aged for 20 hours, and the gel balls were obtained after solid-liquid separation, and were washed with distilled water until no impurity ions were present.

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Abstract

The invention relates to a technology for selective separation of metal ions and particularly discloses a gel sphere-type cesium-ion adsorbing agent which is rubidium silicotungstate-calcium alginate gel microspheres. The invention also discloses a preparation method of the adsorbing agent, and an application thereof for separating and extracting cesium from a solution system containing cesium ions. The gel sphere-type cesium-ion adsorbing agent disclosed by the invention has the advantages that the adsorption capacity is high, and the selectivity is good; the radiation resistance and the heat stability are good and the mechanical strength is high; the gel sphere-type cesium-ion adsorbing agent exists in the form of microsphere particles, so that the solid-liquid separation is convenient; the preparation method is simple and convenient, and the production cost is low; the gel sphere-type cesium-ion adsorbing agent can be used for separating and extracting cesium by an adsorbing method and removing radioactive cesium ions and has no secondary pollution.

Description

technical field [0001] The invention relates to a metal ion selective separation technology, and specifically discloses a gel spherical cesium ion adsorbent, a preparation method and an application thereof. Background technique [0002] Cesium (Cs) is located in the sixth period of the first main group in the periodic table of elements. It is an active metal and a highly dispersed rare alkali metal, which is expensive. Cesium has strong chemical activity and excellent photoelectric effect performance, and plays an important role in many fields such as medical treatment, electronic device manufacturing, and catalytic synthesis. In nature, cesium mainly exists in two forms of ore and brine. [0003] my country is rich in cesium resources, cesium resources in the form of cesium garnet and other solid minerals are mainly distributed in Xinjiang, Jiangxi, Sichuan and other places; Cs in the form of brine is widely distributed in salt lakes, geothermal water, oil and gas fields i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/291B01J20/30C02F1/28C02F1/62G21F9/12
Inventor 吴志坚郭探郭敏李权叶秀深刘海宁
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI