Preparation method of strontium ion Sr<2+>-targeting adsorption material

A technology for adsorbing materials and strontium ions, which is applied in chemical instruments and methods, other chemical processes, nuclear engineering, etc., and can solve the problems of difficult solution separation and hindering the application of palygorskite clay materials.

Inactive Publication Date: 2021-08-20
MCC ENERGY SAVING & ENVIRONMENTAL PROTECTION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the powdery palygorskite clay is not easy to separate from the solution after adsorbing metal ions, it hinders the application of palygorskite clay materials.

Method used

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  • Preparation method of strontium ion Sr&lt;2+&gt;-targeting adsorption material

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preparation example Construction

[0021] The invention provides a targeted strontium ion Sr 2+ A method for preparing an adsorbent, the method comprising the following steps:

[0022] 1) Mix palygorskite clay powder, surfactant, and water, adjust the pH, perform magnetic stirring to obtain a modified system, centrifuge, discard the supernatant to obtain a powder, and dry the powder in an oven to obtain a modified system. Palygorskite clay powder after curing;

[0023] 2) The modified palygorskite clay powder is fully mixed with sodium alginate, and the peristaltic pump is used to drip calcium chloride solution into granules at a uniform speed, and after drying, the targeted strontium ion adsorption material is obtained.

[0024] In step 1) of the present invention, the type of surfactant can be selected in a wide range, but in order to further improve the effect of adsorbing strontium ions on the targeted strontium ion adsorption material, preferably, in step 1), select twelve At least one of sodium alkylsul...

Embodiment 1

[0041] 1) Set palygorskite clay powder, surfactant (sodium tetradecylsulfonate), and water at a ratio of 10:1:50, and use a magnetic stirrer to stir at 60r / min for 12h; after that, the mixed solution is centrifuged Machine 3000r / min, centrifuged for 10min; after that, dried at 105°C for 4h.

[0042]2) Mix the modified palygorskite clay powder, sodium alginate, and water in a ratio of 100:5:300. After stirring well, use a peristaltic pump at 2mL / min to drop the mixed solution into 0.05g / L of chloride Calcium solution, and then dried at 110°C for 2 hours to obtain the targeted strontium ion adsorption material A1.

Embodiment 2

[0044] 1) Set palygorskite clay powder, surfactant (sodium dodecylsulfonate), and water at a ratio of 10:0.6:50, and use a magnetic stirrer to stir at 60r / min for 12h; after that, the mixed solution is centrifuged Machine 3000r / min, centrifuged for 10min; after that, dried at 105°C for 4h.

[0045] 2) Mix the modified palygorskite clay powder, sodium alginate, and water in a ratio of 100:5:400. After fully stirring, use a peristaltic pump at 2mL / min to drop the mixed solution into 0.05g / L chloride Calcium solution, and then dried at 110°C for 2 hours to obtain the targeted strontium ion adsorption material A2.

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Abstract

The invention discloses a preparation method of a strontium ion-targeting adsorption material, which comprises the following steps: mixing palygorskite clay powder, a surfactant and water, adjusting the pH value, conducting stirring by using a magnetic stirrer to obtain a modified system, conducting centrifuging, discarding the supernatant, and drying the powder in a drying oven to obtain modified palygorskite clay powder; and fully mixing the modified palygorskite clay powder with sodium alginate and water according to a certain ratio, dropwise adding the mixed solution into a calcium chloride solution by using a peristaltic pump, granulating, and conducting drying in a drying oven to obtain the strontium ion-targeting adsorption material. The strontium ion-targeting adsorption material can effectively enrich strontium ions in nuclear emission wastewater, liquid-solid separation is easy, and meanwhile the preparation method is few in procedure and easy to operate.

Description

technical field [0001] The present invention relates to nuclear discharge wastewater, in particular to a targeted strontium ion (Sr 2+ ) Preparation method of adsorbent material. Background technique [0002] Strontium (II) exists in many industrial activities such as radioactive waste disposal, nuclear activities, and accidental release of radioactive substances. Due to the radiotoxicity and long ecological half-life of strontium (II) ions, it poses a great threat to the ecological environment. There are many ways to remove strontium (II) ions in nuclear discharge wastewater, such as membrane filtration, ion exchange, and adsorption methods. Among them, adsorption method is one of the most effective methods for removing heavy metal ions in wastewater. Many kinds of adsorbents can be used to remove strontium (II) Ions, including zeolite, activated carbon, magnetic particles, etc. Palygorskite (Pal) clay is a kind of crystalline hydrated magnesium silicate, which is in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30G21F9/12
CPCB01J20/12B01J20/24G21F9/12
Inventor 周爱霞张硕
Owner MCC ENERGY SAVING & ENVIRONMENTAL PROTECTION
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