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Gel ball type rubidium/caesium ion adsorbent, and preparation method and application thereof

A cesium ion and gel ball technology, applied in the field of selective separation of inorganic metal ions, can solve the problems of lack, lack of extraction and utilization of rubidium and cesium resources, etc., and achieves low production cost, good thermal stability and mechanical strength, adsorption High volume effect

Inactive Publication Date: 2013-07-24
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, the separation of rubidium and cesium by adsorption method is mainly focused on the treatment of cesium in nuclear waste liquid pollutants, and there is a lack of research on the extraction and utilization of rubidium and cesium resources from liquids.
In particular, there is a lack of research on the separation and extraction of rubidium and cesium resources from alkali metal ion competition systems such as salt lake brine, oil field water, and geothermal water, where there are symbiotic elements such as lithium, sodium, potassium, magnesium, and calcium.

Method used

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  • Gel ball type rubidium/caesium ion adsorbent, and preparation method and application thereof
  • Gel ball type rubidium/caesium ion adsorbent, and preparation method and application thereof
  • Gel ball type rubidium/caesium ion adsorbent, and preparation method and application thereof

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preparation example Construction

[0028] The gel spherical rubidium and cesium ion adsorbents directly separated from calcium chloride or strontium chloride solutions generally contain calcium, strontium, and other impurity ions, which may affect the adsorption performance of the adsorbent on rubidium and cesium ions or Adsorption capacity, therefore, the preparation method of the present invention may also include the step of washing the gel spherical rubidium and cesium ion adsorbent with water to remove impurity ions. Specifically, the gel balls can be washed directly with pure water.

[0029] The gel spherical rubidium and cesium ion adsorbent prepared by the method of the present invention can generally have a particle diameter of 2-4mm. It should be understood that the smaller the particles, the more fully the contact between the gel ball and the adsorbed solute ions, and the greater the adsorption capacity, but if the particles are too small, it may be difficult to prepare due to the influence of the vi...

Embodiment 1

[0039]Preparation of gel spherical rubidium and cesium ion adsorbents: prepare sodium alginate hydrosol with a mass fraction of 2%; mix sodium alginate hydrosol and potassium tetraphenylborate powder at a mass ratio of 10:1 to form a sol Mixed solution: drop the sol mixed solution into 4% calcium chloride solution, age the gel for 48 hours, obtain gel balls after solid-liquid separation, and wash with distilled water until there is no impurity ion.

[0040] The particle diameter of the gel spherical rubidium and cesium ion adsorbent is 2-4mm.

[0041] figure 1 Shown is the SEM image of the gel spherical rubidium and cesium ion adsorbent obtained in this embodiment, as can be seen from the figure, the surface morphology of the obtained gel spherical rubidium and cesium ion adsorbent is uniform, and the potassium tetraphenylborate particles evenly distributed.

Embodiment 2

[0043] Preparation of gel spherical rubidium and cesium ion adsorbents: prepare sodium alginate hydrosol with a mass fraction of 2%; mix sodium alginate hydrosol and potassium tetraphenylborate powder at a mass ratio of 5:1 to form a sol Mixed solution: drop the sol mixed solution into 0.5% calcium chloride solution, age the gel for 48 hours, and separate the solid and liquid to obtain gel balls. Wash the gel beads with distilled water until free of impurity ions.

[0044] The particle diameter of the gel spherical rubidium and cesium ion adsorbent is 2-4mm.

[0045] figure 2 Shown is the XRD pattern of the gel spherical rubidium and cesium ion adsorbent obtained in this embodiment. After the adsorbent gel balls are dried and ground, an XRD experiment is carried out. According to the XRD pattern, it can be confirmed that the adsorbent of the present invention contains potassium tetraphenylborate with relatively high purity.

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Abstract

The invention discloses a gel ball type rubidium / caesium ion adsorbent, and a preparation method and application thereof. The gel ball type rubidium / caesium ion adsorbent is prepared by the following steps of: preparing sodium alginate hydrosol, mixing potassium tetraphenylborate powder and the sodium alginate hydrosol to form a sol mixing solution, dropping the sol mixing solution into a calcium chloride or strontium chloride solution and performing aging and separation. The preparation method is simple and low in production cost. The obtained rubidium / caesium ion adsorbent is high in adsorption capacity for rubidium / caesium ions and is high in selectivity. The gel ball type rubidium / caesium ion adsorbent can be used for removing the caesium ions from radioactive nuclear waste and is used for extracting the rubidium / caesium ions from an alkali metal competition system.

Description

【Technical field】 [0001] The invention relates to the technical field of selective separation of inorganic metal ions, in particular to a rubidium / cesium ion adsorbent, its preparation method and application. 【Background technique】 [0002] Rubidium and cesium are extremely important and highly dispersed metal resources, which are expensive and play important roles in many fields. For example, it can be used to treat neurasthenia, cancer, and tumors in medicine; rubidium and cesium have excellent photoelectric properties and can be used to manufacture advanced photocells, photocells, spectrographs, scintillation counters, etc.; rubidium, cesium metals and their compounds It has a very good catalytic effect and has been widely used in the catalytic process of hydrogenation, cracking and other reactions in the biological and chemical fields; rubidium and cesium can also be used in aviation technology propulsion, magnetic fluid power generation technology, and the manufacture o...

Claims

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Application Information

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IPC IPC(8): B01J20/291B01J20/30G21F9/12
Inventor 吴志坚郭探郭敏李权叶秀深刘海宁张慧芳
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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